Abstract:
An efficient planning of groundwater expansion using modern
techniques is essential for the proper consumption and management of this precious but
reduction natural resource. With the advent of powerful, professional techniques for
water management have advance, of which GIS and RS (Geographical Information
Systems and Remote Sensing) are of great significance. Groundwater resources
potential has been evaluated in Nintavur DSD using GIS and RS techniques. With the
help of Survey of Sri Lanka top sheets and satellite data, various thematic maps like
base map, drainage map, geology map, geomorphology map, slope map, drainage
density map, population density map and land use map of the study area have been
prepared using Arc GIS software. These thematic maps have been integrated and
appropriate weights have been assigned to various factors controlling rate of
groundwater. The results show that there are four categories of groundwater potential
zones ranging from very good to poor. The categorization of groundwater potential
zones is in general agreement with the acquired yield data of the existing dug wells.
This depicts the favorable potential zones in the study area for evaluation of
groundwater resources. Finally it is concluded that the GIS and RS techniques are very
efficient and useful for the demarcation of groundwater potential zones.
