On the Spatial and Temporal Patterns of Flood and Drought Hazards of China

The flood and drought hazards have been getting more serious attention since 1990's. And they become the obstacle factors constraining China's agriculture and sustainable economic development. This paper selected 2,359 county units and with disasters frequency as flood-drought hazard assessment index, through hazard digital mapping, the spatial and temporal patterns were analyzed and hence understood the flood-drought high risk zone and the transfer causing factors, presented disaster prevention measures for the high-risk zones. In sum, the key areas of preventing and controlling flood and drought disaster should be Northeast Plain, central and eastern Inner Mongolia, North China Plain, the northern part of Shaanxi Province, the middle and lower reaches of Yangtze River Basin, Yunnan-Guizhou Plateau, the southeast coastal region and northern Xinjiang.