| Used-cover type | 1949 | 1958 | 1976 | 1986 | 2010 |
| Water | 14 (24%) | 0 | 0 | 1 (2%) | 1 (2%0 |
| Swamps | 32 (54%) | 4 (7%) | 4 (7%) | 2 (3%) | 4 (7%) |
| Flooded | 13 (22%) | 0 | 0 | 0 | 0 |
| Field Crops | 0 | 35 (59%) | 46 (79%) | 34 (58%) | 40 (68%) |
| Uncultivated | 0 | 10 (17%) | - | 8 (14%) | 3 (5%) |
| Other | 0 | 5 (8.5%) | 2 (3%) | 6 (10%) | 4 (7%) |
| Orchards | 0 | 0 | 2 (3%) | 5 (8%) | 6 (9%) |
| Fish Ponds | 0 | 5 (8.5%) | 3 (8%) | 3 (5%) | 1 (2%) |
| Total | 59 | 59 | 59 | 59 | 59 |