Application of GIS to estimate crop water requirement

摘要

This paper discusses the application of Geographic Information System for water balance study using digital maps. In an irrigation water balance study, Crop water requirement is the major component to be estimated in arriving the irrigation demand ofa cultivable command area. This paper focuses on realizing crop water requirement in the command area of a canal applying GIS, an effective tool for spatial analysis. Our objective is to analyse the crop water requirements in a GIS environment in order to conduct a water balance study and analyse the surpluses or deficits in release from an irrigation tank for paddy cultivation.