Environmental impact assessment for beach nourishment and maintenance dredging of access channels and harbour in Thulhaagiri Island

Abstract

1. Thulhaagiri is a small round island in the central North Malé Atoll. Located just north of Bandos Island resort, the island may be considered one of the oldest resorts in the Maldives, now operating for over 25 years. Currently in full operation, the resort has 52 beach bungalows and 34 over-water bungalows equipped with modern facilities and amenities. The current management of the resort is Angiri Resorts and Management Operation Pvt Ltd, which have been operating the resort for close to 15 years. 2. Owing to its somewhat isolated location in the centre of a large atoll basin, the island is exposed to wind driven waves from eastern and western side of the reef. Consequently the operators have been using two sides of the island for entry into the reef. During the SW monsoons season when winds are blowing from west the eastern entry is used and during north NE Monsoon when the winds are blowing from East and northwest the entry on the western side is used. 3. The inner reef flat used as a harbour sheltered by the well-developed reef crest. The area is shallow, but over time the reef flat becomes shallower due to deposition of sand. In order to maintain the depth at safer levels for the speedboats and vessels, a small pump is used to dredge the areas that get shallower. This has been the practice the resort operators. 4. The objective of the proposed project is to undertake maintenance dredging of the channels on the eastern and western side of the island and to deepen the reef flat area that is being used as harbour. And finally it is proposed to make use of the dredged sand to nourish the receding beaches on the north eastern side of the island. 5. The project activity is justified since these regular pumping and deepening of the channels and reef flat is inconvenient and hinders the smooth operation of the resort. During bad weather entry into the Thulhaagiri is dangerous and risky. There is also a need to rebuild the lost beach on the north-eastern side of the island, now felt necessary by the operators to maintain Thulhaagiri’s market position. 6. Following the recently established regulation on dredging and reclamation of the islands and lagoons, a permit was first obtained for the proposed reclamation and dredging followed by the scoping of the environmental impact assessment of these activities. This EIA is follows the Terms of Reference developed and agreed at the scoping meeting. 7. Dredging will be carried out by using a dredger mounted on a flat-top shallow-draft barge. A temporary sand bed may be constructed on the excavations area. Sand required for the construction of the bed will be obtained by excavation from the adjacent shallow areas. 8. Excavated material deposited on the barge will be transported and deposited on the beach identified for extending where it will be sieved. The coarse material will be deposited first for filling and extending the area followed the finer material on top. Temporary measures will be taken to avoid the sediment washing into the lagoon. Nourished beach will then be levelled using excavators, loaders or manually by the labourers. 9. It has been proposed that timing of this activity should be restricted to February and March, which is the transition period from northeast to southwest monsoon. Wind frequency and magnitude during the period is on the lower side. 10. The total time taken for this activity is estimated at 30 days following approval (or issuing of decision note) following successful evaluation of this report. The key mitigation measures other then timing is that limit dredging activity at lower or slack tide as much as possible. 11. The proponent has provided a commitment letter confirming accepting and confirming their responsibility on mitigation measures suggested in the report and environmental compliance during this undertaking of the proposed activities.