Pressure of water shortage on agriculture in arid region of China

The arid areas in China are mainly located in North China and Northwest China. The North China is the main region for food production. There is 31.19% of the total farmland and 26.01% of the total population, but only 6.14% of the available water resources of China. Groundwater is over pumped (6.53×109m3 every year) in the regions of Beijing, Tianjin, and Hebei Province, so water supply could not meet the water demand there. The distribution of...