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      https://www.ias.ac.in/article/fulltext/jess/129/0094

    • Keywords

       

      AHP; AUC; geospatial; RUSLE; soil erosion

    • Abstract

       

      Soil erosion has always been a major environmental problem in many parts of the world including the northeastern region of India. An increase in the rate of soil erosion has tremendous implications on land degradation, biodiversity loss, productivity, etc. Hence, assessment of soil erosion hazard and its spatial distribution is essential to serve as a baseline data for effective control measures. The present study uses revised universal soil loss equation (RUSLE) and analytical hierarchy process (AHP) approach integrated with geospatial technology for modeling soil erosion hazard zone of West Kameng watershed of Arunachal Pradesh, Northeast India. The assessment showed that the erodibility factor of soil ranged between 0 and 0.38 t/ha/MJ/mm and slope length and steepness factor increases with increase in slope angle. Lower normalized difference vegetation index (NDVI) values depict vegetation cover and higher values represent the rocky area or barren land. Spatial distribution of conservation support practice on soil loss indicated the variability (0–1) where lower value represents the higher conservation practice.The predicted average soil erosion rate was 124.21 t/ha/Yr. Normalized eigen vector values ranged between 0.03 and 0.20. The areas with more slope, relative relief, drainage density, lineament density, and frequency have shown comparatively higher eigen vector values, and it has been noticed that the strength of these eigen vectors reduces with a decrease in the values of the parameters. The spatial soil erosion potential map was delineated using eight geo-environmental variables (LULC, geomorphology, slope, relative relief, drainage density, drainage frequency, lineament density, and lineament frequency). The soil hazard map showed that the moderate soil erosion has the maximum(57.71%) area cover followed by high erosion class (26.09%)which depicts that most of the watershed areas are moderate to high vulnerable to soil erosion. The efficiency of the AHP was validated applying area under curve (AUC) method which result 84.90% accuracy in the present study. Based on the findings, it is being recommended that present watershed requires adequate control procedures on a priority basis to conserve soil resources and reduce flood events and siltation of water bodies.

    • Author Affiliations

       

      BISWAJIT DAS1 REETASHREE BORDOLOI1 LOBSANG TASHI THUNGON1 ASHISH PAUL1 PANKAJ K PANDEY2 MADHUSUDHAN MISHRA3 OM PRAKASH TRIPATHI1

      1. Department of Forestry, North Eastern Regional Institute of Science and Technology (Deemed-to-be University), Nirjuli, Arunachal Pradesh 791 109, India.
      2. Department of Agriculture Engineering, North Eastern Regional Institute of Science and Technology (Deemed-to-be University), Nirjuli, Arunachal Pradesh 791 109, India.
      3. Department of Electronics and Communication Engineering, North Eastern Regional Institute of Science and Technology (Deemed-to-be University), Nirjuli, Arunachal Pradesh 791 109, India.
    • Dates

       
  • Journal of Earth System Science | News

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