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    Technical Report
    Environmental impact assessment for the proposed development of an agricultural island Dhurureha Thaa Atoll, Maldives
    (2017-09) Sandcays
    This report discusses the findings of a social and environmental impact study under the proposed development of agriculture on Dhururehaa, Thaa Atoll. The project is proposed by Mohamed Latheef. The proponent aims at developing Dhurureha as an agricultural island; providing job opportunities, reducing dependency on imported produce and ultimately working towards economic diversification and growth of Maldivian economy. The agricultural activities on Dhurureha will be carried out in greenhouses as a hydroponics system. A total of 12 greenhouses (100ft by 50ft each) is proposed to be built for growing tomato, capsicum, bell pepper and lettuce. Additionally, a 60m by 30m nursery will be built on the island. Access to the island is to be provided by dredging an access channel and a 200m jetty. Water requirement for the project is to be met by utilizing an RO plant. A suitable size diesel generator will be used throughout the project to meet power requirement. Staff facilities such as accommodation, mesh room, mosque and office building will also be constructed on the island. A cold storage, general storage and small packaging facility will also be constructed on the island during construction stage. A waste collection and management station will be established for using during construction phase and operational phase of the project At present, Dhurureha is an uninhabited island not used for any purpose. However, locals of the nearby communities use the island to collect coconuts, go on picnics and gather firewood. Alternatives to project components have been identified in the project document. These include alternative uses of the island such as for a tourist resort. However, upon closer analysis of these options, the proposed development of the island for agricultural purpose was found to be more viable based on the present circumstances under which the island has been leased. Therefore, the consultants propose exploring use of alternative renewable sources to the proposed fuel based energy generation. Environmental impacts were assessed for both the construction and operation phase of the project. Most of the environmental impacts of the project have been identified as minor negative with highly positive socio-economic impacts. The main negative impacts from the project include habitat loss from vegetation clearance, sedimentation and consequent impacts on marine wildlife health and waste generation during the operational phase. The mitigation measures outlined for these impacts include conserving mature trees to the greatest possible extent, relocating large live corals at the proposed access channel area and establishing dust control plans in addition to employing best-practice guidelines during the operational phase. The most positive socio-economic impacts related to the project are increase in job opportunities, reduction in prices of agricultural produce and increase of national revenue. It is inevitable that there would be some negative environmental impacts. However, most of the impacts of the proposed project are minor compared to the positive socio-economic benefits of the proposed system. Yet, monitoring to ensure the effectiveness of the proposed project would be necessary. Therefore, a monitoring component has been suggested which takes in to consideration, the most important elements that require regular checks. This monitoring component will be adhered to and will allow the assessment of changes due to construction and implementation of the proposed agriculture project. Monitoring is specifically focussed on employment opportunities, price changes in the market, direct and indirect economic ventures, ground and marine water quality, changes in the hydrodynamics of the project area as well as impacts on the reef or marine ecological area of importance. In conclusion, it appears justified from a technical and environmental point of view, to carry out the proposed project to develop Dhurureha as an agricultural island.
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    Technical Report
    Environmental impact assessment proposed milkfish aquaculture project Matu, Gaafu Alif Atoll
    (2017-07) Sandcays
    This report addresses the environmental concerns of the proposed milkfish (Chanos chanos) hatchery project in Ga. Matu. The project is proposed by Ministry of Fisheries and Agriculture. Concerns about live-bait availability over prolonged periods are being raised in recent years, especially in the southern atolls of Maldives. The development of aquaculture for selected bait species is seen as one possible measure to manage the live bait shortage currently faced by local fishermen. Cultured milkfish has been in use for the longlining industry in different parts of the world, and successfully piloted for the pole-and-line industry in Indonesia and Kiribati. Unlike most of the live bait species currently in use in the pole-and-line fishery, hatchery technology is well developed for milkfish. In addition, the relatively short duration to reach bait-size makes milkfish an ideal species for aquaculture development. Supplementing the tuna fishermen with cultured bait is expected to reduce the time spent on bait search, and in turn, result in increased effort directed to the tuna fishery. As live bait shortage is mostly reported from the southern atolls, the proposed hatchery site was selected from Gaafu Alif atoll, for logistical ease in distribution for the most needed areas can be made. The selected island, Matu from Ga. Atoll is 5.9 Ha small uninhabited island on the northern side of Ga.Atoll. The closest inhabited islands to the project site are Ga. Villingili and Kolamaafushi. The project aims to produce 100 tons of milkfish raised to the size of live bait used in the pole-and-line fishery. All required technical and support infrastructure will be constructed during the construction phase of the project. The operational phase will involve water circulation, feeding and rearing of cultured stock. In addition to hatchery, nursery and broodstock modules built on land, sea cages will be built for brood stock. Power will be provided for the project via diesel generators, while potable water will be provided via RO plants. Accommodation for staff and administrative buildings and waste management centre will also be constructed on the island. Access to the island will be provided via access channel and a jetty. The naturally deep lagoon will be used as a harbour during the project. Social and environmental concerns regarding the proposed project include: • Vegetation clearance during site preparation for construction of land infrastructures. This impact is considered minor negative as outmost care will be taken to reduce cutting down mature vegetation. Buildings will be adjusted as much as possible to reduce requirement of cutting or relocation of mature trees. When unavoidable, two plants for every tree cut will be planted on the island. • Sedimentation during excavation of access channel and construction of main jetty. This impact is considered as negligible as the excavation involved is very minor. Measures to reduce this impact such as working during calm weather and low-tide has been suggested as mitigation measures. • Minor impacts due to human activity in the area including littering both during construction and operational phases. • Increased nutrient loadings from faeces and uneaten food wastes, which will either dissolve or settle on the seabed beneath the cage. Since the water is deep and adequate currents exist, eutrophication is, however, unlikely. The proposed project is expected to be managed in conformity with local and international regulations and standards of relevance, especially environmental regulations and standards. Therefore, environmental impacts will be well managed, minimized and mitigated. Given that the project has major socio-economic benefits and some environmental benefits (potential to reduce pressure on wild populations of baitfish), it is recommended to allow the project to proceed as proposed. It is important to consider uncertainties and continue to monitor the project impacts and undertake appropriate mitigation measures in consultation with the EPA and other relevant government agencies. It is also necessary to undertake regular environmental monitoring activities.
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    Technical Report
    First addendum: K. Villimale environment impact assessment to Villimale' west harbour construction project, Kaafu Atoll, Maldives
    (2017-10) Hussain, Firdous
    This is the first Addendum to the Environment Impact Assessment (EIA) for the west harbour project in Villimale’, Kaafu Atoll. The project is proposed by Ministry of Housing and Infrastructure. A Scoping Meeting for EIA addendum was held on 13 July 2017, following the addendum application where main issues related to the proposed change were discussed. This EIA addendum report aims to assess the issues highlighted in Terms of Reference (ToR) agreed between EPA and proponent. Furthermore it is to fulfil the requirement of the Environmental Protection and Preservation Act of the Maldives (Law No. 4/93). Construction of K.Villimale’ West Harbour was contracted with MTCC on 19th May 2015, whereas an environmental assessment was undertaken for this project on November 2015 by MEECO. Construction phase of the project was commenced during November 2016 during the extended period of EIA DS, but it was halted within few days to bring changes to the concept. According to the EIA, condition of the existing harbour has been deteriorated over the years with the existing sand-cement breakwater fallen apart providing no wave protection from the west side. In addition to being used as a harbouring area, west harbour in Villimale’ also serves as a boat beaching and maintenance area. On top of these issues, the project aims to provide a proper landing craft (LC) loading area for waste transportation between Villimale’ and Thilafushi as the island has never had such an area before. Initially waste loading was carried out from a temporary ramp located on the west side of the island near the waste disposal area. The ramp was open to the sea on the west with no protecting seawall or reakwater. Similarly, current ramp used by LC is a temporary rock boulder bed shaped in the form of a ramp which is located at the southern end of the west harbour old breakwater. The area still phase the issues of being open to the predominant wave direction during the southwest monsoon. Considering the issues, Vilimale’ is in urgent need of a south west harbour reconstruction accommodating a better and feasible ramp for LC operation. In the initial harbour concept, LC loading ramp was proposed to be constructed at the southern end of the harbour in such a way that it can be accessed from within the harbour. Consequently, operating LCs would be subjected to move back and forth along a length of about 100m (total length of the harbour and channel) which is a risky task given the size of the landing craft and the anchoring vessels. Maneuvering a LC within the harbour may not be practical as the harbour width is 21m and clearance from all sides may not be available at all times of operation. LCs operated by WAMCO for waste transportation measures around 35m by 10m in size. At present, LC operates to Villamle’ around 2-3 days a week. However, WAMCO is planning to continue operation every day to cater the increasing amount of waste from Villimale’. To continue the operation smoothly on a regular basis without obstruction, a proper loading area with suitable anchoring facilities are needed. Therefore, an amendment to the initial concept has been proposed to dredge a new channel from the south end of the harbour, opening to west which will mostly be used by the LCs in waste transportation between Villimale and Thilafushi. The channel measures 34m by 16m in dimension with its south side proposed to be protected by concrete T-units. A concrete ramp measuring 16m by 12m will be constructed on the eastern side of the channel. The ramp will be reoriented to face the newly proposed channel. This is a much needed amendment as the initial location of the ramp is not feasible for LC operation. Though the channel will be open to the western sea, ramp area will provide proper anchoring facilities with a quay-wall to anchor alongside. In the EIA report the consultant has recommended to consider including culverts in the breakwater to enhance water circulation to prevent water stagnation within the harbour basin. But the newly proposed channel will ensure proper water circulation within the harbour alleviating the need for culverts. This addendum addresses the mentioned modifications to the harbour concept together with its environmental aspects. Thus, Villimale’ West harbour project with the proposed change will alleviate three main issues related to socio-economic development of the island. They are providing a safe and secure harbouring facilities to the vessels together with an easily accessible beaching area and a feasible waste transfer mechanism for the LCs of WAMCO. Environmental impacts of the proposed change were assessed for both construction and operation stage of the project. Most of the identified impacts are positive as they will improve the socio-economic situation of the island. As in all construction projects of this nature and explained in Villimale’ harbour construction EIA, the main negative environmental impact of the project is identified to be the movement and settlement of sediment on the reef and habitat loss during the dredging and breakwater construction. However, the benthic cover of the project area including the proposed channel location is predominantly composed of dead corals, sand and rubble. Hence, combined negative effects are considered to be insignificant compared to the positive effects of the project with the proposed change. Effective impact mitigation measures are to be taken during the construction. It is advised to keep the proposed channel closed until all the dredging is carried out which will prevent the dispersion of suspended sediments. In addition to this, it is strongly recommended to adhere to the mitigation measures proposed in the initial EIA which is sufficient for the project. A special attention should be paid to protect the coral gardening area on the north of the west harbour against sedimentation. Environment monitoring program discussed in 2015 EIA is sufficient and should be followed. Additionally, it is important to visually access and conduct a community consultation to identify whether the harbour basin experiences rough turbulence due to the two channels to an extent where it makes the usage of harbour difficult. In an environmental and technical point of view, the proposed change to the west harbour concept of K.Villimale is justified and beneficial in number of ways.
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    Technical Report
    Environmental impact assessment for the proposed commercial sand mining project at Fushidhiggarufalhu, South Malé Atoll
    (2017-11) Sandcays
    This report discusses the findings of an environmental impact assessment undertaken for the purpose of approval for commercial sand mining at Fushidhiggarufalhu in South Malé Atoll. The project is proposed by Endheri and Sons, who are currently involved in manual sand mining activities in Kaafu Atoll. The EIA is required because the Proponent wishes to use pumps for sand mining to increase their productivity and subsequent sales. The project involves the mining of sand by using sand pump at Fushidhiggarufalhu in South Malé Atoll. This lagoon has been approved for sand mining by the government. However, according to the Ministry of Fisheries and Agriculture, sand mining using sand pumps or other machinery and mining of large volumes of sand for commercial purposes would require EIA for approval. The Proponent wishes to use a 4 or 6-inch sand pump for mining sand from Fushidhiggaru lagoon. The project does not cover the fill location but pumping into containers and transporting the containers in dhoni or other vessel. Appropriate locations have been identified at the edges of the deep lagoon areas. It is estimated that if these areas are dredged to the same depth as the adjoining deep lagoon, over 600,000m3/ of sand may be taken from these areas. This would be equal to about 3 years of continuous sand mining using a 6-inch sand pump. Environmental impacts identified for the project are slightly positive overall due to the socio-economic benefits from the project. The main positive impacts are revenue and employment opportunities. The use of pumps will also reduce the safety concerns associated with manual mining, which has added benefits. The use of pumps makes the mining process less manual, therefore, safer for the workforce while increasing the productivity. This does not necessarily mean reduced workforce as additional job opportunities would be created. However, the socio-economic benefits of the project are not so strong due to the scale of the project. There is the concern that other sand miners will follow suit in which case it would be necessary to identify different locations for different miners and geographic areas that can be mined and to make other arrangements such as security posts. There is the potential for growth in the sand mining industry especially with the growing construction industry and several resorts in Malé Atoll where regular beach nourishment is a necessity but where there are no lagoon areas from which sand can be pumped. However, there are very few places in Malé Atoll from where sand can be mined as most of the lagoons have been leased for resort development. In fact, Fushidhiggarufalhu was previously leased for resort development and would possibly be leased again in the near future. There are no positive environmental impacts related to the project although it may be argued that sand mining would be an important activity that will reduce the dependence on imported construction material, which has large environmental impacts related to transport. The negative environmental impacts related to mining of sand using sand pumps include increased sedimentation during filling. The sediment as it flows from the vessel and into the marine environment would have some degree of unwanted particles including traces of oil and rust particles that would be on the vessel. Therefore, it would be important to keep the top of the vessel, where the containers are filled, clean and tidy at all times. The proposed borrow areas are several hundred metres from the reef areas, therefore, the impacts of sedimentation are not expected to degrade the closest reef areas. Yet, sediment control measures shall be in place in and outside the vessel. Since the project has minor negative impacts, an assessment of alternatives was not considered necessary. However, since the approved Terms of Reference requires alternative borrow areas and methods to be identified, three alternative borrow areas in Malé Atoll (near Malé) and alternative work methods of excavation including using of excavator has been identified. The only possible alternative borrow locations in Malé Atoll are Gulhee Falhu, Thilafalhu and the southwest end of Velassarufalhu. These locations would have greater conflicts of interest than the Fushidhiggarufalhu at present. However, Fushidhiggarufalhu will have conflicts in case it is leased for resort development, which could be the case soon. The alternative of using excavator for mining sand would not be acceptable due to the large degree of sedimentation that it would cause followed by aesthetic impacts. It would also not be feasible due to depth limitations. However, grab hoppers with large grab buckets may be considered a more feasible option for sand mining using machinery. In conclusion, it appears justified from a technical, administrative and environmental point of view, to carry out the proposed project. While a strict monitoring programme is not necessary, it is proposed to monitor and report to EPA the depths of the dredged areas and marine transect from a fixed location in the closest marine areas every six months.
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    Technical Report
    Environmental impact assessment for the proposed development of an agricultural island Faadhoo Lhaviyani Atoll, Maldives
    (2017-11) Sandcays
    This report discusses the findings of a social and environmental impact study under the proposed development of agriculture on Faadhoo, Lhaviyani Atoll. The project is proposed by Open Blue Pvt. Ltd. The project aims to use Faadhoo island for agriculture, and produce both local varieties, and some of the imported food. Among the proposed activities to be carried out on the island include the horticulture of watermelons, papayas, tomatoes, lettuce, herbs, salads, and mushrooms. Under the proposed project, there will be clearance of about 1.7ha of the land for construction of necessary infrastructure and construction of a jetty for access to the island. Services related to the proposed project such as water, sewerage, energy and waste will also be established during the construction phase. At present, Faadhoo is an uninhabited island not used for any official industrial or recreational purpose. There are two wetland areas listed as an environmental sensitive area (by EPA) on the island. The larger of the two wetlands has a mangal vegetation of 2.8ha (including the water body), dominated by Rhizophora mucronata (Ran’doo) and Bruguiera cylindrica (Kandoo); while the smaller one has a mangal vegetation of 0.5ha; with same species of mangroves. The proposed project activities will not fall within the boundary of these areas and the proponent has included a buffer zone between the ESA and project infrastructure. The small size of the Maldivian islands, and the absence of adequate natural freshwater supplies make it hard for the majority of food in the Maldives to be grown and harvested on a commercial scale within the country. Furthermore, climatic factors render it difficult to produce the imported food as well. However, there are some species such as melons, papayas, tomatoes, bananas, various herbs, and salads which can be farmed and harvested economically. The produce can be sold to the tourism industry, which imports majority of the agricultural products from other countries. Hence, the main goal of this project is to develop the agricultural industry of the Maldives, and to potentially cater for the market demand from tourism, as well as the local market. Alternatives for the proposed project have been identified in this document. These include alternative uses of the island such as development of the island as an ecotourism site due to the presence of a mangrove site, or leaving the island as it is in its natural state, which in the future may potentially increase the value of the island. The consultants recommend exploring use of renewable energy alternatives highlighted as well as organic farming and vertical farming to increase efficiency of space usage under this project. Environmental impacts were assessed for both the construction and operation phase of the project. Most of the environmental impacts of the project have been identified as minor negative, with positive socio-economic impacts, especially if the agricultural methods are done organically, or with limited use of fertilisers and pesticides. The main negative impacts from the project include biomass and habitat loss from vegetation clearance, sedimentation and consequent impacts on marine wildlife, and waste generation and effluents, especially during the operational phase. The mitigation measures outlined for these impacts include conserving mature trees to the greatest possible extent, creating vegetation buffer zones, and habitat corridors, using organic agricultural methods, using natural biofertilizers and pesticides and establishing dust and emission control plans, in addition to employing best-practice guidelines for agriculture during the operational phase. The most positive socio-economic impacts related to the project are reduction in prices of agricultural produce, and increase of national revenue, and job opportunities. A monitoring mechanism to ensure the effectiveness of the proposed project is also included in this document. This monitoring component allows for the assessment of changes that will occur during the construction and implementation of the proposed agriculture project. Monitoring is specifically focussed on environmental aspects such as ground and marine water quality, changes in the hydrodynamics of the project area, as well as impacts on the reef or marine ecological area, agricultural methods, and social aspects such as labour and occupational health and safety aspects. In conclusion, the proposed project is justified in terms of environmental impacts based on predicted economic and social benefits of the project. As such, the consultants are of the opinion the project may proceed as proposed; provided the recommended mitigation measures and environmental monitoring program is implemented.
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    Technical Report
    Environmental impact assessment for the proposed development of Southwest Harbour Male’ City Maldives
    (2015-10) Sandcays
    This report discusses the findings of an Environmental Impact Assessment for the proposed development of Male’ Southwest harbour. The project is proposed by Ministry of Housing and Infrastructure. At present, Male’ city is overcrowded with numerous industrial operations right in the middle of residential areas. Among the numerous social and environment issues faced by the large community of Male’ city is waste management and pollution. The project aims at developing the southwest harbour so that some of the industrial work is relocated out of residential areas and provide a dedicated area for transfer of waste from Male’ area to Thilafushi. The proposed project entails reclamation of 3.7Ha at the southwest harbour and maintenance dredging of south harbour. In addition, a new access channel will be provided to allow access to southern harbour. Material for reclamation is to be obtained from maintenance dredging of harbours in the greater Male’ region, demolition waste from west coast development project and dredging activity at Gulhifalhu. There are very few practical alternatives to the proposed project; alternatives to dredge material and dredge areas are assessed in the report. Environmental impacts were assessed for both the construction and operation phase of the project. Most of the environmental impacts of the project have been identified as positive resulting mainly from improved socio-economic situation of Male’. The main negative environmental impact of the project is identified to be the possible movement of low to moderate levels of sediment on the reef during channel dredging and reclamation. Movement and settlement of fine sediments are expected to occur on the reef flat to a small degree. However, effects of this would not be severe as sediment plume is not expected to last longer and live coral cover at the location is minimal. In addition, temporary inconvenience to vessels using the harbour area is predicted during construction phase. Overall, the negative environmental impacts of the project are short-term and of moderate significance while long term socio-economic benefits are numerous. Hence the impact matrices done for the project indicates a net positive impact. Impact mitigation measures are few. In order to mitigate inconvenience to users of harbour during construction, an alternative location for their use for the duration of construction phase is proposed. In addition, bunds around reclamation area and creating settlement ponds are also suggested to reduce spread of sediment plume during construction phase of the project. Regular environmental monitoring and reporting is an essential element of the EIA process. During the construction phase, in-situ monitoring of total suspended solids and turbidity is usually undertaken in harbour and reclamation projects to ensure that water quality criteria are met and sedimentation on the reef does not occur. It is recommended to incorporate these into an island-wide monitoring programme, which is not within the scope of this EIA report. In conclusion, it appears justified from a technical and environmental point of view to carry out the proposed project to develop southwest harbour of Male’ city. However, before start of construction phase, the consultants recommend evaluating alternative dredge material option proposed in this report; as use of demolition waste from Male’ buildings is likely to reduce cost of project.
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    Technical Report
    Environmental impact assessment for the proposed sewerage system Ihavandhoo, Haa Alifu Atoll, Maldives
    (2015-11) Sandcays
    This report discusses the findings of an environmental impact study under the proposed sewerage system project at HA. Ihavandhoo. The project is proposed by Ministry of Environment and Energy. The project entails establishment of a proper island-wide sewerage system with a sea outfall. The proposed project will involve installing a pipe network to collect sewage from all the households on the island and necessary pumping stations. Currently raw sewage is disposed onto the ground via house-level soak-pits; polluting groundwater greatly. The proposed outfall will pump wastewater beyond the house-reef at over 7m depth. A number of alternatives to the proposed project components have been identified in this document. Of these, the preferred alternative is to change the outfall location. It is also proposed to consider a treatment plant in the design, though the consultants are of the opinion, proposed system without a treatment plant but changed outfall location is the best option. Other alternatives include considering different disposal options; ground and lagoon, which are not recommended for reasons of greater environmental pollution. Environmental impacts were assessed for both the construction and operational phase of the project. Most of the environmental impacts identified for the construction phase of the project were minor negative; these include sedimentation from installing the outfall and temporary salinization of groundwater from de-watering to lay out the pipe network and pump stations. However, the impacts identified for the operational phase of the project were mostly moderate to major positive; improvement of groundwater quality from stopping the current sewage disposal practise and reduction of related health hazards. Disposal of sewage via proposed sea outfall is considered to have a minor negative impact. The main mitigation measures for this project during the construction phase are similar to other sewerage projects such as dust control plans, working during low- tide as much as possible and rigorous supervision. In case of deterioration of groundwater quality due to potential dewatering during construction of lifting stations in residential area, measures to water plants in the area that may be affected due to dewatering shall be in place. The design shall also ensure that dewatering is minimized. As for the operational phase trained maintenance staff to service the sewerage system and regular check-ups has been suggested in addition to monitoring water quality as well as reef health for potential impacts. Increasing awareness on groundwater conservation and promoting sustainable groundwater aquifer management, especially the skimming well technology has been suggested. The Proponent is willing to undertake monitoring during and after the construction phase in addition to undertaking the mitigation measures proposed by the consultants. In conclusion, it appears justified from a technical, administrative and to some extent environmental point of view, to carry out the proposed sewerage system development project. The alternative of wastewater treatment will involve greater operational costs; therefore, it is recommended to proceed the project as proposed while keeping the option open for future wastewater treatment, as and when required.
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    Technical Report
    Environmental impact assessment for the proposed sewerage system Gadhdhoo, Gaafu Dhaalu Atoll, Maldives
    (2015-11) Sandcays
    This report discusses the findings of an environmental impact study under the proposed sewerage system project at GDh. Gadhdhoo. The project is proposed by the Ministry of Environment and Energy. The project entails establishment of a proper island-wide sewerage system with a sea outfall. The proposed project will involve installing a pipe network to collect sewage from all the households on the island and necessary pumping stations. Currently raw sewage is disposed onto the ground via house-level soak-pits; polluting groundwater greatly. The proposed outfall will pump wastewater beyond the house-reef at about 15m depth. A number of alternatives to the proposed project components have been identified in this document. Of these, the preferred alternative is to include a treatment plant in the design, though the consultants are of the opinion, proposed system without a treatment plan is the best option. Other alternatives include considering different disposal options; ground and lagoon, which are not recommended for reasons of greater environmental pollution. Environmental impacts were assessed for both the construction and operational phase of the project. Most of the environmental impacts identified for the construction phase of the project were minor negative; these include sedimentation from installing the outfall and temporary salinization of groundwater from de-watering to lay out the pipe network and pump stations. However, the impacts identified for the operational phase of the project were mostly moderate to major positive; improvement of groundwater quality from stopping the current sewage disposal practise and reduction of related health hazards. Disposal of sewage via proposed sea outfall is considered to have a minor negative impact. The main mitigation measures for this project during the construction phase are similar to other sewerage projects such as dust control plans, working during low- tide as much as possible and rigorous supervision. In case of deterioration of groundwater quality due to potential dewatering during construction of lifting stations in residential area, measures to water plants in the area that may be affected due to dewatering shall be in place. The design shall also ensure that dewatering is minimized. As for the operational phase trained maintenance staff to service the sewerage system and regular check-ups has been suggested in addition to monitoring water quality as well as reef health for potential impacts. Increasing awareness on groundwater conservation and promoting sustainable groundwater aquifer management, especially the skimming well technology has been suggested. The Proponent is willing to undertake monitoring during and after the construction phase in addition to undertaking the mitigation measures proposed by the consultants. In conclusion, it appears justified from a technical, administrative and to some extent environmental point of view, to carry out the proposed sewerage system development project. The alternative of wastewater treatment will involve greater operational costs; therefore, it is recommended to proceed the project as proposed while keeping the option open for future wastewater treatment, as and when required.
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    Technical Report
    Environmental impact assessment for the proposed water supply and sewerage system Kolamaafushi Gaafu Alifu, Maldives
    (2015-08) Sandcays
    This report discusses the findings of an environmental impact study under the proposed water supply and sewerage system project at GA. Kolamaafushi. The project is proposed by the Ministry of Environment and Energy. The project entails establishment of a proper island-wide water and sewerage system. The proposed project involves installing a water distribution network to supply desalinated water supplemented with treated rainwater to all households and a comprehensive sewerage system to dispose of domestic sewage and wastewater. At present rainwater tanks of 2500litres connected to household roofs are used for drinking and cooking purposes while groundwater is used for all other purposes. Sewage and wastewater at household level is disposed to the ground via household septic tanks causing aquifer contamination. Groundwater wells are also fixed with electric pumps to draw water which has been the main reason for excessive drawdown and subsequent salinization of the freshwater lens. The small water collection facilities at household level presents water shortage issues during the dry season while contamination of the groundwater lens with wastewater effluent and salinization of the lens has become an increasingly important public health issue. Hence, it is important to provide adequate supply of potable water and provide appropriate wastewater disposal systems to minimize faecal contamination and foul smell in the groundwater. In addition, a number of alternatives to the proposed project components have been identified in this document. Some of these alternatives consider alternative means of wastewater disposal including treatment, alternative means of water supply, alternative outfall locations and alternatives to sustainable groundwater. Treatment is considered as a favourable option while it has been argued that if the effluent can be disposed of at an appropriate location, there would not be a need for treatment since there will be good mixing and flushing in such areas. It has also been recommended to use solar desalination technologies since the initial demand would be low and production capacity minimal. Environmental impacts were assessed for both the construction and operational phase of the project. Most of the environmental impacts identified for the construction phase of the project were minor negative; these include excavation and related difficulties to road uses, sedimentation from installing the outfall and temporary salinization of groundwater from de-watering to lay out the pipe network and pump stations. However, the impacts identified for the operational phase of the project were mostly moderate to major positive; improvement of groundwater quality from stopping the current sewage disposal practise and reduction of related health hazards. Disposal of sewage via a sea outfall is considered as minor negative impact while decommission of existing septic tanks will improve groundwater quality of the island. The provision of safe and adequate supply of potable water enhances living environment and provides economic opportunities such as tourism establishments including guest houses and city hotels. The main mitigation measures for this project during the construction phase are similar to other water and sewerage projects such as dust control plans, working during low- tide as much as possible and rigorous supervision. In case of deterioration of groundwater quality due to potential dewatering during construction of lifting stations in residential area, measures to water plants in the area that may be affected due to dewatering shall be in place. The design shall also ensure that dewatering is minimized. As for the operational phase trained maintenance staff to service the water and sewerage system and regular check-ups has been suggested in addition to monitoring water quality as well as reef health for potential impacts. Increasing awareness on groundwater conservation and promoting sustainable groundwater aquifer management, especially the skimming well technology has been suggested. In conclusion, it appears justified from a technical, administrative, socio-economic, health and an environmental point of view, to carry out the proposed water and sewerage system development project. The alternative of wastewater treatment will involve greater operational costs; therefore, it is recommended to proceed the project as proposed while keeping the option open for future wastewater treatment, as and when required.
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    Technical Report
    Environmental impact assessment for the proposed resort development Maareha Gaaf Alif Atoll, Maldives
    (2014-04) Sandcays
    This report addresses the environmental concerns of the proposed development of a resort on Maareha, Gaafu Alifu Atoll. The island is about 16.5hectares in its size and is located on a shared reef system at the eastern side of Gaafu Alifu Atoll. The Proponent of the proposed development is Moving International Pvt. Ltd. The Proponent proposes to develop a modern resort on Maareha with 20-bed Family Villas, 98-bed Water villas, 208-bed Beach Bungalows, 84-bed Beach Twin Villas and 4-bed Presidential Villas. Furthermore, it also includes Arrival Pavillion, Diving school, Medical Clinic, Mosque, Service jetty, Main Restaurant, Souvenir and Jewellery shops, Coffee shop / Bar, Swimming pool, Sports and recreation center for guests, Cinema, AV room, Karoake, Disco, Water Sports Center, Football Ground, Basketball Court, Tennis Court, Spa Complex, Children Play, Recycle House, Staff Recreation Center, Staff Training Center, Cafes and different utilities including desalination plant, sewage treatment plant, waste management center and powerhouse. The proposed development will conform to all current environmental legislation including the Regulation on the Protection and Conservation of the Environment in the Tourism Industry. The main negative impact of the proposed development will be the impact of sedimentation on the areas of the housereef on the west where the proposed harbour and access channel will be developed and the impact of deforestation due to land clearance for proposed buildings. These impacts are inevitable. Yet, every effort is to be made to minimize the impact and footprint of the impact. The impact of sedimentation on the reef will be minimized by taking into consideration appropriate hydrodynamic and tidal conditions, creating settlement basins as the dredging activity proceeds or by using silt screens. To minimize the impact of deforestation, buildings will be designed around mature trees minimizing their removal. If a mature tree were to be removed, they will be carefully uprooted and transplanted elsewhere. The negative impacts of the water villas include impacts on sediment transport around the northwestern side of Maareha and some minor degree of sedimentation on the reef nearby. There will be no impact on neighbouring Medhuhutta, which is about 50m, due to the strong currents in the channel between the two islands (over 0.5m/s) helping them to behave as two separate littoral systems. However, there are uncertainties given the lack of data and hence monitoring hydrodynamics and changes to shoreline of both islands during the construction as well as operational phase will further help to evaluate this impact more accurately. To minimize this impact on longshore sediment transport, the walkways of water villas will stand on piles with their footings buried in the seabed. The impact of sedimentation will be minimized by taking care to move the water villas as far away from the live reef areas as possible and transplanting any live corals that may be directly impacted. Care will also be taken to minimize sedimentation on the reef when placing water villa footings and columns. Precast footings and columns will be used and excavator movements shall be minimized. Excavator is preferably moved on barge to minimize sedimentation and if high bed excavators were to be used, they shall move as far from coral reef flat areas as possible. This impact of sedimentation will be short-lived given that tidal and wind-driven currents would normally carry the sediments away from the reef at all tides and monsoons. It is vital, therefore, to monitor the condition of the reef prior to the start of works, during the works and after the works to establish the true nature of the impact. The other environmental impacts of the proposed development include solid waste management, water supply, sewage disposal and energy generation. Solid waste will be generated both during the constructional and operational phase of the resort. Constructional waste will be disposed of by the Contractor to Thilafushi if a regional landfill or waste management site does not exist. During the operational phase, a waste management center established on the island will segregate waste and dispose of them in a manner prescribed in tourism regulations. It is during the construction stage that the waste is often not managed properly and waste ends up in the environment. Therefore, it is vital that waste management procedures are in place during construction phase to ensure waste is appropriately dealt with. Supervision and awareness of construction workforce is highly recommended. Desalination, sewage treatment and power generation are fuel-dependent processes and fuel efficient desalination technology, STPs and, especially, generator sets will be installed in the island. Solar water heaters have been proposed and photovoltaic system incorporated, the costs of which have already been taken into consideration. Gravity sewers will deliver the sewage and only a single pumping station will be used. Treated effluent with low levels of BOD (less than 20mg/l) will be disposed to the sea at not less than 10m below MSL and 5m away from the reef edge. Therefore, the impact from sewage disposal will be almost negligible. In fact, the daily peak flows is quite small that the proposed sea outfall would provide over 500-fold dilution to the sewage effluent even if it were raw sewage, which would occur only in the unlikely event that the sewage treatment plant fails. Hence, no further mitigation measures have been considered for sewage disposal and treatment. The project encompasses clean technology and an initial investment worth a million dollars would be spent on solar energy system. This will complement the proposed diesel generator sets. In addition, solar water heaters will be installed to provide hot water to all guest units. Also, to minimize fuel and water consumption, it is proposed to install energy and water efficient technology including faucets. The costs of these have already been included in the project. Environmental monitoring has also been incorporated into the project. Arrangements for monitoring during constructional and operational phase will be considered immediately upon EIA approval. Monitoring will be undertaken according to the monitoring programme recommended in this report. Recommended monitoring for the project includes the monitoring of shoreline at predetermined and bench-marked tide level, beach profiles and drogues at locations given in the EIA report, marine water quality at the location of the intake, brine discharge, sea outfall and a control location, groundwater at a location close to the powerhouse and desalination plant and a control location and quality of product water at 3 specified locations including product water tank. Annual monitoring reports have to be submitted to the Environmental Protection Agency over the monitoring period and shall include fuel and water consumption data and greenhouse gas emission calculations. The overall environmental impacts of the project have been assessed using appropriate matrices and the results indicated that the proposed project has net positive impact. Given that the project has major socio-economic benefits although there would be some negative environmental impacts, it is recommended to allow the project to proceed as proposed.