Ponds are standing body of water having a seasonal fluctuation, basically excavated or embanked in nature, formed by natural or manmade processes. Historical evidences have proved that ponds have been excavated for the holistic development of an area. But it is the common feature throughout the world that these ponds are getting negligency in maintenance, conservation and also in research purposes especially in the developing countries. But this small unit has immense role in maintaining the balanced condition between the hydrological and ecological parameters of its surroundings. An investigation has made on the changing trend of the pond status in the Kopai river basin area of West Bengal. Normalize Difference Water Index (NDWI) have used to determine the changing trends of the pond in the study area, by ERDAS 9.2 and ArcGIS 10 Software. This index value has varied from +1 to -1 and is helpful to detect the small water body easily from the satellite images. Field surveys proved that number of ponds is being reduced in the urban areas but at the same time there is slow increase in the rural area. So the actual environmental crisis regarding pond is the deterioration of the water quality and the dearth of maintenance considering its impact on neighbouring society.
Changing Trend, NDVI, Pond management
