Environment - ތިމާވެށި
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Item Environment impact assessment for the construction of weather mast at Hoarafushi, HA. Atoll(2016-03) Land and Marine Environmental Resources GroupThe non-technical summary outlines the findings of the Environmental Impact Assessment of the construction of a 77m (with the instrument boom and lightning arrester total hight will be 82m) high weather mast at HA. Hoarafushi for collection of wind data. The proponent of the proposed project is Ministry of Environment and Energy. The total estimated cost of this project is USO 191,000.00. . This project is a component of "Renewable Energy Resource Mapping and Geo-spatial Resource Mapping - Maldives Project". The current works are part of second phase of the project which involves data collection for 24 months at several locations around Maldives for developing a validated mesoscale wind atlas for the Maldives. Key impacts, mitigation measures and alternatives The proposed project is not expected to have any impacts during the operational phase. The Impacts on the environment from various activities of the construction work have been identified through interviews with the project management team, field data collection and surveys and are also based on past experience of consultant. Mitigation measures have also been identified for impacts. Impact analysis was done using the Leopold matrix. Impact analysis showed that impact due to the project was minor and on various parameters of the terrestrial environment such as vegetation and groundwater. Mitigation measures are discussed in the report for potential impacts. Given the scope of the project the only possible alternatives for the project was a no-project scenario or alternative location for construction of tower. The "do-nothing" option or no project scenario would mean that the data requirement for the wind model will not be available and alternative island to be selected. The selection of the island is made based on phase one of the project which identified locations for data points spread around the island for modeling purposes. Since renewable energy ventures and development of the sector is a policy of government it is essential to undertake all data collection and feasibility studies to be able to make an informed decision. Furthermore the project is a grant from World Bank and government is required to fulfill its obligation in facilitating the project. Therefore given that the benefits of project are high and environmental impacts are low, the no project scenario is rejected.Item Environmental impact assessment for construction and development of water supply system at Dhangethi, Adh. Atoll(2016-12) Land and Marine Environmental Resources GroupThe non-technical summary outlines the findings of the Environmental Impact Assessment of the construction and development of a freshwater production and distribution system at ADh. Dhangethi. The proponent of this project is the Ministry of Environment and Energy and total estimated cost of the project is MRF 17 million. To meet the water supply demand and to provide a quality treated water RO desalination with rainwater collection scheme is proposed for the island. The project involves the setup of a RO plant facility with two RO plants each with a capacity of producing 60m3 of freshwater per day One RO plant will be operational at anyone time while the remaining plant will be kept as a backup. Rainwater will be collected from the public buildings which will go through separate treatments before being mixed with RO desalinated water. Key impacts, mitigation measures and alternatives Impacts on the environment from various activities of the project development work (constructional impacts) and operational impacts have been identified through interviews with the Project management team, field data collection and surveys and are also based on past experience of consultant in similar projects. Impacts were analysed for their significance with the aid of a Leopold Matrix. In any development project, major direct impacts to the environment occur mainly during the construction phase. Potential direct or indirect impacts on the environment from the proposed project include: Minor to moderate impacts to the groundwater resource during drilling and construction work Impact on vegetation due to the need to cut down vegetation located at the plot Impact due to air and noise pollution during construction work Impact on marine environment due to discharge of brine Positive impact on social wellbeing and health Mitigation measures are discussed for the activities which would have potential impacts during the construction and operational phase of the project. In general, during the construction stage it is important to use a method of construction which has the least impact on the environment. Specific measures highlighted include following of established guidelines when carrying out excavation works and dewatering and transplantation of Coconut palms around the periphery of the project site. Detailed mitigation measures are discussed in Section 11 of the report. Alternatives have been considered for various components of the project and are given as possible options that may be either more practical or less expensive to the preferred options. The proposed alternatives also have taken into consideration the environmental consequences resulting from these options as compared to the preferred options. The following components of the project have been discussed in providing these alternatives; Location of RO plant facility Source of feedwater for RO plant Brine discharge location The no-project scenario is also considered, which would mean that all environmental impacts due to the project would no longer be an issue. However, this also means that the community would have to continue using only rainwater and groundwater as main freshwater sources. Additionally, it would also mean increased health risks faced by the community due to the use of contaminated water and the loss of potential additional job creation during the operation of the service. The environmental impacts predicted for the project are minor to moderate, hence the benefits of establishing the system, though with a cost to the environment is seen to be far more beneficial than the cancellation of the project, as the health risks faced by the community is not something that should and can be overlooked. Therefore the “no-project” scenario is not a feasible solution and it is recommended that the project be continued, but with the proper implementation of all mitigation measures proposed in the report. Details of the various alternatives considered and the selected alternatives are shown in Section 10 of the report.Item Environmental impact assessment for the development of aquatic animal quarantine facility at Ibrahim Nasir International Airport(2016-07) Land and Marine Environmental Resources GroupThe non-technical summary outlines the findings of the Environmental Impact Assessment of the proposed construction of a live aquatic animal quarantine facility at the Ibrahim Nasir International Airport. The proponent of the project is the Ministry of Fisheries and Agriculture. The proposed project is a part of the institutional strengthening component of the Mariculture Enterprise Development Project (MEDeP) implemented by the Ministry. It involves construction and set up of the live aquatic animal quarantine facility, which is inclusive of a quarantine building and pump station. The seawater for the holding tanks will be sourced through a seawater well located at the lagoon area to the west of project site (back reef area of Hulhule reef), while wastewater discharge will be through pipeline laid from facility to the western reef (pipeline south of facility and run near quay wall of harbor southern side of Hulhule Island Hotel, close to the along-side berthing area for fuel tanker ships). Key impacts, mitigation measures and alternatives Impacts on the environment from various activities of the construction work and during the operation of the facility have been identified through interviews with the project management team, field data collection and surveys. The impacts identified are also described according to their location, extent and characteristics. Impact analysis was done using the Leopold matrix. Impacts due to project were few and minimal, mainly with low effects. Impacts were mainly envisaged on seawater quality and marine environment, as well as vegetation (due to removal of coconut palms). Details of impact analysis are discussed in Section 9 of the report. Detailed mitigation measures are discussed in Section 11 of the report. Given the minimal impacts, mitigation measures due to project are few. However, the formulation of contingency plans in case of equipment breakdown or incidence of other events such as fire and floods should be given a priority. Due to the scope of the project and the means of implementation, an alternative scenario has also been given for the means of wastewater disposal. The „no project‟ alternative is also considered. Although this would mean avoidance of environmental impacts, this option is not feasible due to the necessity of the project, especially if the mariculture sector was to expand. Hence the project, with current designs and methods is considered feasible, and Consultant feels that appropriate mitigation measures have been given in the report.Item Environmental impact assessment for coastal modification and construction of a causeway between Hoan’dehdhoo and Madaveli, Gaafu Dhaalu Atoll(2016-10) Land and Marine Environmental Resources GroupThe non-technical summary outlines the findings of the Environmental Impact Assessment for the construction of a causeway of length 441m, linking Hoan‟dehdhoo and Madaveli and the reclamation of 3.5ha of land area in Madaveli in Gaafu Dhaalu Atoll in the South of Maldives. This project was earlier addressed through another EIA submitted in 2012 (SEAMARC, 2012), though due to delays in implementation of the project, the EIA period is now void. Furthermore, design of the causeway and changes to other components of the project, requires submission of a second EIA for the project, prior to commencement. The project proponent of the proposed project for coastal modification and construction of causeway between Hoan‟dehdhoo and Madaveli is Ministry of Housing and Infrastructure while the contractor for the project is Maldives Transport and Contracting Company Plc.The project includes two components: 1. Construction of a causeway linking the islands of Hoan‟dehdhoo and Madaveli. The proposed causeway has a total length of 441m and width of 15m. The causeway between the two islands will be constructed in two parts connected by the uninhabited island of Haadhoo which lies in the shallow lagoon area between the two islands. Construction of the causeway will be through reclamation of land area between the islands, whereby stretch of land between Madaveli to Haadhoo is proposed to have a length of 261m, while that between Haadhoo and Hoan‟dehdhoo is proposed to have a length of 180m. The area will be reclaimed to a height of 1.4m above Mean Sea Level (MSL) and protected through construction of a sand cement bag revetment along the whole length of both sides of the causeway. Concrete culverts at 50m apart will be placed along the length of the causeway to allow tide flow. The length of the culverts is equal to the width of the causeway (15m) and 6m wide. 2. The second component of the project is the reclamation of 3.5ha of land at the southeastern side of Madaveli. Reclamation of the land will be to a height of 1.3m above MSL, using sand sourced from the lagoon area. Proposed borrow area for the project is located at the eastern side lagoon between the two islands. A total of 73,500m3 of sand is required for this work and the recommended borrow area is proposed to be dredged to a depth of -3m from the seabed.Impacts on the environment from various activities of the project (both during construction and operation) have been identified through interviews with the project management team, field data collection and surveys and are also based on past experience of consultant in similar development projects. Impacts which have been identified were analysed with the aid of a Leopold Matrix, which gives numerical assessment of the magnitude and importance of an impact. The proposed project involves construction of a causeway between Madaveli and Hoan‟dehdhoo and reclamation of 3.5ha of land area on the southeastern side of Madaveli. The main construction stage impact associated with the project is due to dredging and reclamation works, which have the potential to greatly impact the marine environment through direct habitat loss and indirectly through sedimentation. Impacts discussed are; Direct loss of habitat due to dredging and reclamation work Sedimentation impact due to dredging and reclamation work Mobilization of equipment and labor Impact on vegetation due to causeway and road construction Noise, vibration and disturbance to nearby residents Impact on vegetation Pollution of natural environment due to possible spillage, solid waste, disposal of untreated waste water Risk of accidents and pollution on workers and local population The proposed borrow area is located at the eastern side of the reef between the two islands. Dredging works is proposed to be undertaken using excavator and transported using interim bonds. Dredging works at the borrow area will create sediment plume and expected to flow eastwards (tidal currents). Sand bund is proposed around the periphery of dredging area hence spread of fines will be reduced. The causeway construction works will close the aperture between Madaveli/Haadhoo/Hoan‟dehdhoo and stop flow of water. The culverts will be laid after connecting the islands, hence sediment plume will be minor and only depend on tidal currents (west to east on the eastern side of causeway). Impacts of sedimentation during causeway reclamation are therefore categorized as moderate and short termed. Significant negative impact on western side (southern side bay area of both islands) shoreline and immediate land area adjacent to proposed causeway is envisaged in the operational phase. In the event of storm surge (udha), water will pile up at the western side bay area causing rise of water level consequently causing flooding. Even at present, periodic flooding is experienced during SW monsoon due to storm surge. Therefore protection against storm surge is thought to be less and negative impacts high due to current design of the causeway. Mitigation measures for the various components which are expected to have impacts, have been proposed in the report, including the recommendation to revise the current design of causeway and include revetment at the southern side of reclamation area. Given that this project is developed specifically for these two islands, an alternative location is not considered. Alternatives for the project have been considered for the following; Design of the causeway Materials used to construct the revetment Borrow location Reclamation design The no-project scenario is also considered, the environmental impacts which arise due to the project such as change to hydrodynamics and loss of marine habitat and possible increase in surge related flooding can be avoided. However, should this option be chosen, this means that the social benefits (increased employment opportunities, easier travel between islands, better public services and increased housing plots) provided by the project will be cancelled. Hence given the high positive impact on the socioeconomic environment, discontinuation of the project is not seen to be a feasible option. Although this may be the case, the current causeway design is envisaged to increase surge related flooding hence this component is not feasible and needs to be revised. Details of the various alternatives considered and the selected alternatives are shown in Section 10 of the report. The consultant concludes that the proposed project component, especially the causeway with current design which lacks coastal protection measures in the vicinity of the causeway on either island is likely to cause significant environmental damage (specifically coastal flooding) at both islands. It is therefore recommended that an alternative design for the causeway should be considered.