National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The impact of comprehensive interventions in checking soil erosion, improving water availability, development of agro-forestry, sustainable management of natural resources, enhancement of agricultural productivity and socio-economic aspects of the farmers of watershed interventions implemented under River Valley Project (RVP) in 149 micro watersheds of Mettur reservoir catchment of Tamil Nadu has been studied through random evaluation of 22 sample watersheds. The results shows that the drainage line treatments made their impacts in terms of arresting silts at the rate of about 12.6 cum yr-1 per watershed. Surface runoff was found to be 4.5 to 5.6 per cent of the rainfall for selected rainfall events. Based on silt deposited behind selected check dams / ponds, soil loss was estimated to vary in the range of 2.3 to 3.51 t ha-1yr-1, which is very well within the permissible limit. Further, the study revealed that the net present value of the project was more than Rs. 943 crore with 1.75:1 BCR and 68 per cent IRR which proves that the project was technically feasible and economically viable. Though the project has made positive impact in the project area, it lacks required convergence and linkages with the line departments such as Agriculture, Horticulture, Rural Development and Forestry which suggests that during the phasing out stage, strong linkages should be developed with these departments to integrate the various developmental schemes with this project and ensure sustainability after its withdrawal.
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