Thursday, 13 July 2006

Mapping and Monitoring of Salt Affected Area of District Gurgaon Uisng Remote Sensing and Gis Techniques.

Shashi Jain, Mohinder Singh Grewal Sr., and M.S. Kuhad. CCS HAU, Hisar Haryana (India), Deptt. of Soil Science COA CCS HAU, Hisar, Hisar (Haryana), India

The salt affected area in different years with the use of multispectral and multitemporal satellite data like Landsat TM , IRS LISS II and IRS LISS III on different scale decreased during 1986 to 1998. This was due to the effect of reclamation measures, transfer of technology and supply of gypsum to farmers at subsidized rate adopted by different implementing agencies. The resolutions of different satellites have clearly shown that higher the resolution better are the mapping capabilities. Likewise small scale maps on 1:250000 scale were helpful in the identification of the units but aerial extents of these units were calculated more accurately with the help of large scale map on 1:50,000. Evaluation of capabilities offered by different satellite data revealed that IRS 1D LISS III provided the best results followed by LISS II and Landsat TM data. GIS and Digital image processing through various transformations were proved to be an important tool for preparing various layers in GIS environment. Thus this can be concluded from the study that remote sensing coupled with GIS and digital image processing techniques were helpful in recognizing, mapping and monitoring salt affected areas. Moreover, it is very easy for the implementing agencies to monitor the extent of these salt affected areas and to see the effects of various reclamation measures being adopted.

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