Estimation of Surface Runoff for Ahmedabad Urban Area using SCS-CN Method and GIS

Chiragkumar S.Bhura; Dr. N. P. Singh; Priteshkumar R. Mori; Dr. Indra Prakash; Khalid Mehmood

CALL FOR PAPERS : Mar-2023

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25-Mar-23

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Estimation of Surface Runoff for Ahmedabad Urban Area using SCS-CN Method and GIS

Author(s):

Chiragkumar S.Bhura , L. D. COLLEGE OF ENGINEERING, AHMEDABAD; Dr. N. P. Singh, L.D.C.E., AHMEDABAD; Priteshkumar R. Mori, L.D.C.E., AHMEDABAD; Dr. Indra Prakash, BISAG, Gandhinagar; Khalid Mehmood, BISAG, Gandhinagar

Keywords:

AMC-I, AMC-II and AMC-III), SCS

Abstract:

Soil conservation Service (SCS) model was used for the estimation of surface runoff for Ahmedabad urban area. Sub-watershed level areas covering Ahmedabad urban area are considered for the estimation of runoff. The daily rainfall data of 4 rain gauge stations (1988-2012) is collected. Thiesson polygon method is used for finding average distribution of rainfall in whole study area. Landuse/Landcover map was prepared from the satellite image and soil map of study area was prepared using GIS. Landuse/Landcover map and Soil map are used to estimate curve number for SCS method. Antecedent Moisture Conditions (AMC-I, AMC-II and AMC-III) are also used for selecting suitable curve number in study area. SCS-CN method was used to determine the runoff depth distribution using remote sensing and Geographic Information System.