| Inland Reservoir | Coastal Reservoir |
Dam-site | Limited (mountainous area) | Unlimited (inside/outside river mouth) |
Dam design | High pressure | Low pressure but with wave/tidal surge |
Seepage | By pressure difference | By density difference |
Pollutants | Land based | Land based + seawater |
Resettlement costs | High | None |
Water supply | By gravity | By pump |
Water catchment | Small part | Whole catchment |