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Oceanography / Meteorology
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Feasibility studies of changes in Coastline, Sri Lanka
| Area No. | Area in Sq. meters |
| 1 | 1076 |
| 2 | 497 |
| 3 | 3591 |
| 4 | 30187 |
| 5 | 44188 |
| 6 | 2967 |
| 7 | 4306 |
| 8 | 7589 |
| 9 | 7344 |
Study of change of main coastal habitats:
As the third step, it necessary to study the changes in costal habitats in the areas which subjected to changes along the coastal belt.
The most common coastal habitats found in coastal area in Sri Lanka are:
1.Coaral reefs:
There are ecosystems situated in shallow tropical seas. The location of the major reefs are mappable from large scale aerial photographs.
2. Estuaries:
There are all river mouths into which the tide flow and the locations could be know from the available topographical maps.
4.Mangroves:
The area which covered by tree along sea coasts, lagoons and river mouths. The location of mangroves are mappable from aerial photographs, high resolution satellite imageries and field investigation.
5.Salt marshed:
It consists of herbaceous salt tolerant plant growing sandy or muddy coastal flat in arid area. The location could be known from the aerial photographs and topographical maps.
6. Seagram beds:
These are occurring in shallow, nearshore coastal water are consisting of communities of rooted seed bearing, marine plants. It is difficult to interpret from the small scale aerial photographs and location could be mappable from large scale aerial photographs.
7.Coatal sand dunes:
These are wind blown accumulations of sand occurring in the in the coastalizone. Their location and changes in position of major sand dunes are mappable from aerial photographs and topographical maps.
8.Barrier beaches and spits:
These are accumulations of unconsolidated sediment transported to shore by waves and molded into a form that lies across abode of water. Most of the beaches in Sri Lanka are barrier beaches by largoons. The locations of this are known from aerial photographs and satellite imageries.
9.Marsh lands:
These are permanently wet and muddy uncultivable and frequently inundated area. The location of marsh lands are mappable from aerial photographs, high resolution satellite image and topographical maps.
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