DEVELOPMENT OF DRAINAGE PLAN FOR WATERLOGGED AREAS

The combined use of remotely-sensed images and GIS based environmental applications in this work is needed for systematic ideas and scientific planning in the Darbhanga district of Bihar. Various indices such as NDVI NDWI MNDWI (Esri) MNDWI (IHS) had been obtained to assess the water-logged areas. The total area subjected to water-logging in the Darbhanga district was found to be 42282 ha. The area of water-logging was found in the two sub-divisions of the Darbhanga district. The blocks of Darbhanga and Biraul sub-division holding the water-logging area of 21899 ha and 20383 ha respectively. The surface drainage plan for the blocks of Darbhanga and Biraul sub-divisions have been expressed by showing the main drain lines and outlets which was based on the comparison of different thematic maps. The useful measures also have been suggested to execute the drainage plan in an active manner.