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Not AvailableIn the present study, soil loss in Nagpur district of Maharashtra is predicted employing USLE method and adopting integrated analysis in GIS to prioritise the tehsils for soil conservation and for delineation of suitable conservation units. Remote sensing techniques are applied to delineate the land cover of the district and to arrive at annual cover factors. Results indicate that potential soil loss of very slight to slight (>5-10 tons/ha/year) exist in the valleys in north western, northern and in the plains of central and eastern parts of the district.- Moderate to moderately severe erosion rates (10 to 20 tones/ha/year) is noticed in the south- eastern and some central parts. Severe, very severe and extremely severe erosion types (20 to 80 tons/ha/year) are noticed in the northern, western, southwestern and southern parts of the district. The average soil loss is estimated to be 23.1 and 15.5 tons/ha/yr under potential and actual conditions respectively. Slight, moderate, moderately severe and extremely severe potential erosion covering about 41 per cent area of the district is reduced to negligible and very slight rates of actual erosion under the influence of present land cover leading to a reduction of 7421.2 tones of potential soil loss. Priority rating of the tahsils is evaluated from the area weighted mean quantum of soil loss. Multi-criteria overlay analysis with the parameters of soil erosion, slope, soil depth, land cover and surface texture with rating for the constituent classes has resulted in delineation of nine conservation units. Appropriate agronomic and mechanical practices are suggested in the identified units for minimizing the erosion hazard.Not Availabl

Location specific insitu soil and water conservation interventions for sustainable management of drylands

Identifying the suitable sites for insitu and ex-situ soil and water conservation interventions with the help of survey is one of the giant tasks for planners. Considering the time consumption for conventional geographical surveys for identification of potential sites, a methodology is being developed using the remote sensing and GIS techniques to find the suitable locations for different insitu soil and water conservation interventions. Different thematic layers of slope, soil, rainfall and land use land cover was intersected in ARCGIS and the selected criteria for each intervention was applied for identifying the suitable locations. This methodology was applied for identifying the suitable locations of different insitu soil and water conservation interventions such as contour bunds, semi-circular bunds, small pits, contour bench terraces, contour ridges and stone bunds in Adilabad District of Telangana state. Among the different interventions selected, stone bunds, contour bunds and small pits are more suitable for major portion of the Adilabad District. This methodology deciphers more precise, easier and less time consuming planning technique which has the ability to process districts or even large catchments.