Mapping of waterlogged and salt affected areas of Muktsar District South West Punjab using Landsat-TM and IRS-ID, LISS-III data.

摘要

Indian Remote Sensing Satellite Linear Imaging Self Scanning Sensor and Landsat Thematic Mapper data in the form of standard false colour composite print at 1:250 000 scale covering Muktsar district of southwest Punjab, India, were used to delineate waterlogged areas and salt-affected soils through Normalized Difference Water Index (NDWI) and unsupervised classification approach, respectively. By using NDWI, the waterlogged areas were estimated to be 6347, 6977 and 4356 ha in 15 May, 11 November 1997 and 18 February 2002, respectively. The salt-affected areas estimated using unsupervised classification approach were 8918.25, 8715.46 and 15 223.85 in 15 May, 11 November 1997 and 18 February 2002, respectively. The spatial extent of salt-affected soils was observed during the period from 1997 to 2003..