deficiency, high temperature etc… Soil water deficiency Plant water stress, reduced biomass and yield Reduced stream flow, inflow to reservoirs, Groundwater deficiency, …… Economic, Social, and Environmental impacts [from National Drought Mitigation Center, University of Nebraska-Lincoln, USA] See also [Mishra and Singh, 2010] meteorological Agricultural Hydrological 水文過程と生態系のダメージを陽に解いて干ばつをシミュレートする。水文過程と 生態系の相互作用に注目して干ばつの進行メカニズムを精緻に明らかにする