Modelling the Crop Water Requirement Using CROPWAT: A Case Study of Samrat Ashok Sagar (Halali) Project Command

Abstract

This paper is focuses on analyzing the crop water requirement of Wheat crop using 9 year (2005-2013) average climatic data of Samrat Ashok Sagar reservoir command area in Vidisha district of Madhya Pradesh state, India. CROPWAT & ILWIS are used to estimate Crop water requirement and Area distribution under different canals respectively. Four type of Soils existed in command area are considered for Irrigation scheduling as per their parameter. Study shows that the Crop Water Requirement in the Samrat Ashok Sagar command has been estimated to be 106.50 MCM based on the climatic consideration only and 110.83 MCM as per Climatic with Soil parameter both. At least 16 % less water will be required as compared to the designed crop water requirements of 131.89 MCM for the SAS Project command, if the irrigation scheduling is planned according to CROPWAT model. The savings in irrigation water may be utilised for extension of command area.