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Photo-interpetation for erosion assessment in the beas catchment

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Abstract

Panchromatic vertical aerial photographs in the scale of 1: 15,000 were interpreted for assessment of erosion in the Bcas River Valley Project catchment, Himachal Pradesh in terms of the erosion intensity units. The erosion intensity units imply the relative quantum of sediment yield as deduced from the probable interaction of the significant parameters of erosion comprising physiography, slope, soil characteristics, Vegetation, land use and the visible erosion conditions. The procedure of photo-interpretation as also computation of sediment yield index for each of the different watersheds in the Beas RVP catchment is discussed. The survey revealed that out ofa total of 494 watersheds involving an area of 5.5 lakh ha, 132 watersheds comprising an area of 1.55 lakh ha, have silt yield index of over 1150 and need soil conservation measures on priority basis.

Application of photo-interpretation has proved 2 times more efficient than the conventionai method that was followed in a piain area of Matatilla RVP catchment. In a more simpler terrain than Beas catchment and with ideal photographic scale of 1:60,000, the efficiency is expected to increase by 2-3 times than was achieved in Beas RVP catchment

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References

  • Bali, Y.P. and Karale, R.L. (1977) Sediment Yield Index as a Criteria for Delinea- tion of Priority Watersheds. Accepted for presentation atInternat. Symp. Erosion andSolid Matter Transport, UNESCO, Paris.

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Authors and Affiliations

  1. All India Soil and Land Use Survey (Department of Agriculture), New Delhi

    R. L. Karale, Y. P. Bali & C. P. Singh

Authors
  1. R. L. Karale
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  2. Y. P. Bali
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  3. C. P. Singh
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Karale, R.L., Bali, Y.P. & Singh, C.P. Photo-interpetation for erosion assessment in the beas catchment. Journ. Ind. Soc. Photo-Int. 4, 29–36 (1976). https://doi.org/10.1007/BF02989265

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  • DOI: https://doi.org/10.1007/BF02989265

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