7-Remote Sensing for Hydromorphogeological Investigations in River Basins.

Abstract

Remote Sensing Techniques using aerial Photographs, Landsat and IRS images in conjunction with the ground truth have enabled to study the hydromorphogeological features of the Guhiya basin in the Indian desert. The basin has been classified into geomorphic units and based on the geomorphic characteristics of these units surface and ground water resources have been evaluated. Out of nine sub-basins identified in the basin, four sub-basins have better runoff potentials due to the higher drainage density. Surface water bodies like streams, village ponds (Nadis) and reservoirs could easily be identified and inapp dfrom the Landsat products. The temporal change in the surface areas of water bodies have also been detected from multidate Landsat imagery. Based on the Hydromorphological characterics of the basin, seven aquifers have been identified and mapped in the basin and the new concept of the doner and receptor groundwater zones has been highlighted for the management of these aquifers.