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Title: | Ministry of housing and environment initial environmental impact assessment report harbour restoration works at Hithadhoo, Addu City |
Authors: | Land and Marine Environmental Resources Group |
Keywords: | Existing environment Environmental impacts Construction impacts |
Issue Date: | Mar-2011 |
Citation: | Land and Marine Environmental Resources Group. (2011). Ministry of housing and environment initial environmental impact assessment report harbour restoration works at Hithadhoo, Addu City. Male': Maldives |
Abstract: | This Environmental Impact Assessment (EIA) report is to fulfill the regulatory requirements
under the Environmental Protection and Preservation Act of Maldives prior to the proposed
harbor restoration at Hithadhoo in Addu City.
2. Project proponent of the proposed harbor restoration project is Ministry of Housing and
Environment. The project was bided as a design and build project. The contractor for the project is Works Corporation Limited.
3. The proposed development project involves renovation and restoration of Hithadhoo
harbor. The existing harbor quay wall is badly damaged at the southern side of the harbor
and is in need for repair. Under the proposed project, new quay wall (concrete sheet piles, L
section) will be constructed. The harbor basin and entrance channel will also undergo
maintenance dredging to -3MSL, while the harbor will be expanded at the southern side.
Approximately 230m. The concept plan is formulated in light of the new third generation
harbor concept which is focused at functionality of the harbor. In this regard harbor usage
components such as passenger embarking/disembarking, loading unloading area, fish
landing, water and fuel recharging and mooring area will be demarcated.
4. The island of Hithadhoo lies at the north western side of the Addu atoll approximately
526km south of Capital city Male. Measuring 8.7 km in length and around 1.7 km in width
(at maximum), the island covers an area of 551ha; the island is oriented north west to south
east. The island is located at 00° 36' 25" N and 73° 05' 19" E.
5. The existing harbor facility is located at the eastern side of the island facing the deep lagoon.
The site boundaries are harbor basin area. The harbor facility will undergo expansion,
maintenance dredging and construction of new quay wall.
6. Overall existing harbor design and footprint area will not change apart from extension of the
quay wall and basin southwards approximately 230m (part of basin already deepened, 80m
length, therefore approximately 150m length of basin is required for deepening). The length
of the harbor after completion of renovation works will be 533m and width 76. The existing
entrance channel route will be used after restoration as access to harbor; no additional
dredging is required at this area apart from few shallow spots. The shallow area near the quay
wall will be dredged to -3.0MSL (the rest of the basin existing has a depth of -4.5 on
average).
7. Dredge material removed from the harbor basin (maintenance dredging and expansion
works) will be initially stockpiled near harbor area till required for construction works.
Dredged material will be used for back filling makeshift harbor and areas at the quay wall
extension area. Approximately 50,000m3 (back filling works) of sediment will be used of the
construction work, and short coming of dredged material be met by dredged material
removed from harbor restoration works at S. Feydhoo and harbor expansion area of Hithadhoo harbor.
8. Due to relative large distance from the harbor no detailed assessment of the reef was carried
out. However, qualitative assessment of the sea grass and reef flat was carried out to get
information on the general setting of these two habitats adjacent to the harbor. Hithadhoo
protected Area (HPA) in approximately 400 meters from the harbor which may lead to some
level of impacts from sedimentation associated with the harbor maintenance works such as
quay wall reconstruction and back filling of quay wall.
9. It is important to note that the most significant impact associated with the project would be
impact on the marine environment from sedimentation. Dredging and excavation often carry
a heavy load of sediments increasing sediment load in the water column causing
discoloration due to suspended sediments of the impact area for a prolonged period. Since
the project is a restoration project, the extent of sediment plum will be limited at the harbor
basin area; the natural deep lagoon and manmade deep channel paths at the area will limit the
spread of the sediment plume.
10. Since the proposed project is a restoration project, environmental impacts associated with
the proposed project are considered minor to moderate.
11. Mitigation measures are provided in the report for impacts that were categorized minor to
moderate. Impact mitigation measures and monitoring is carried out to compare predicted
and actual impacts occurring from project activities to determine the efficiency of the
mitigation measures. The eastern side of Hithadhoo is modified over the years, with major
reclamation works and coastal modifications. In this regard harbor proximity area, has no
natural shoreline but composed of reclaimed shoreline and revetment structures.
12. With due consideration to main environmental components identified and the magnitude of
impacts on these components from the proposed developments, the consultant concludes
that the project components and designs are feasible and appropriate mitigation measures are
given to correct and minimize unfavorable environmental consequences. Furthermore, the
public and community consultation responses were in favor of the project due to the socioeconomic
benefits foreseen to the community from a functional harbor. |
URI: | http://saruna.mnu.edu.mv/jspui/handle/123456789/3212 |
Appears in Collections: | ތިމާވެށި Environment A
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