Spatial Analysis of Crop Water Demand in Asia Region

Abstract

Water is the most crucial resource. The need for water use is increasing globally, especially in the agricultural sector, which is the primary driver of the need for water use in many countries. Efficient use of irrigation water can be achieved by good crop management. One of the essential aspects of increasing irrigation efficiency is to perform an Irrigation Water Demand (IWD) analysis. An accurate Crop Water Demand (CWD) assessment is key to good water management. The method used in this study is remote sensing by utilizing NDVI data and Evapotranspiration Potential to determine the value of Kc and CWD. The spatial model analysis results show that Asia's crop coefficient and crop water demand show that, in general, the highest Kc values are found in the Central Asian region and parts of Southeast Asia. The highest CWD accumulation values can be seen in the Central and Southeast Asian areas, especially in India, Pakistan, parts of Indonesia, and Thailand.