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Runoff Estimation and Morphometric Analysis for Hesaraghatta Watershed Using IRS–1D LISS III FCC Satellite Data

  • R. K. Somashekar
  • P. Ravikumar
  • S. V. Sowmya
  • Mubhashir Aziz Dar
  • A. S. Ravikumar
Research Article

Abstract

The study area, Hesaraghatta watershed is located between 77° 20′ to 77° 42′ E longitude and 13° 10′ to 13° 24′ N latitude with an area of 600.01 km2. Thematic layers such as Land Use/Land Cover, drainage, soil and hydrological soil group were generated from IRS–1D LISS III satellite data (FCC). An attempt was made to estimate runoff using Soil Conservation Service (SCS) curve number model and it was estimated to be 1960, 2066, 1870 and 1810 mm for sub-watersheds 1, 2, 3 and 4 respectively. Quantitative morphometric analysis was carried out for the entire watershed and the four sub-watersheds independently by estimating their (a) linear aspects like stream order, stream length, stream length ratio, bifurcation ratio, length of overland flow, drainage pattern (b) aerial aspects like shape factor, circulatory ratio, elongation ratio and drainage density and (c) relief aspects like basin relief, relief ratio, relative relief and ruggedness number. Drainage density was estimated to be 1.23 km/km2 designating the study area as a very coarse textured watershed.

Keywords

Hesaraghatta Watershed Soil Conservation Service (SCS) Antecedent Moisture Conditions (AMC) Runoff Morphometric analysis 

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Copyright information

© Indian Society of Remote Sensing 2011

Authors and Affiliations

  • R. K. Somashekar
    • 1
  • P. Ravikumar
    • 1
  • S. V. Sowmya
    • 1
  • Mubhashir Aziz Dar
    • 1
  • A. S. Ravikumar
    • 2
  1. 1.Department of Environmental ScienceBangalore UniversityBangaloreIndia
  2. 2.Department of Civil Engineering, UVCEBangalore UniversityBangaloreIndia

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