• Prioritization of soil conservation measures using erodibility indices as criteria in Sikkim (India)

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    • Keywords

       

      Erosion; erodibility indices; clay ratio; dispersion ratio; modified clay ratio; critical level of soil organic matter

    • Abstract

       

      Erodibility indices are important parameter that can be used to describe the intensity of the soil erosion problems causing environmental concerns. These indices are convenient to estimate the susceptibility to erosion where physical measurement is very difficult. Sikkim is one such state in India where measuringerosion is a tedious process due to its difficult and inaccessible terrain conditions. In the present study, spatial variation of susceptibility of erosion in East district of Sikkim was estimated by using indices such as clay ratio, dispersion ratio, mod clay ratio and critical level of soil organic matter. The result indicates soils in East district are mostly dominated by sand particles (40.5–81.06%) in majority of soilsamples. The dispersion ratio values in most of the soils were >15% indicating very high vulnerability to erosion. The values of clay ratio (3.44–9), modified clay ratio (mean value of 6.9) and critical level of soil organic matter content (<5%) indicated high susceptibility to erosion. The trends of indices were generated by IDW interpolation method to understand the spatial variation of the susceptibility toerosion. The interpolated maps were overlaid on subwatershed maps to prioritize the subwatershed for planning treatment measures.

    • Author Affiliations

       

      Kusre B C1 Parmita Ghosh2 Kishan Nath3

      1. Department of Irrigation and Drainage Engineering, College of Agricultural Engineering and PHT, Central Agricultural University, Ranipool, Sikkim 737 135, India.
      2. CSRE, IIT Bombay, Powai, Mumbai 400 076, India.
      3. PGDRM, Institute of Rural Management (IRMA), Anand, Gujarat 388 001, India.
    • Dates

       
  • Journal of Earth System Science | News

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