Seasonal (Kharif, Rabi and Zaid) Precipitation, Potential Evapotranspiration and Aridity Index with Respect to Various Agro Ecological Zones of India

Abstract

Climate change has very significant impact on livelihoods and food security. The geospatial technology provides a better understanding of various themes related to climate change. This study examined the seasonal (kharif, rabi and zaid) long term (1970-2000) monthly climatic parameters such as precipitation, potential evapotranspiration over the country of India. The seasonal Aridity Index was computed and analyzed with respect to various agro-ecological zones of India. The analysis of long term mean precipitation (mm) during kharif, rabi and zaid season was found to be in the range of (14-7463), (0-914) and (0-1722) respectively. The analyses of the long term mean potential evapotranspiration in all seasons was found notable high in arid/semiarid zones. The Aridity Index during kharif, rabi and zaid seasons was found to be in the range of (0.19-4.27), (0.03-0.73) and (0.01-1.48) respectively. The seasonal Aridity Index in some of the agro-ecological zones of the central India in the arid and semiarid regions was found to be notably low. A concrete plan with synergic approach including integrated watershed management and traditional ecological practices will help to fulfill crop water demand and maintain adequate soil moisture for the present and future crops.