Drought Risk Regionalization of Potatoes in Inner Mongolia

Drought is a primary determinant agro-meteorological disaster which constrains the potato yield in Inner Mongolia.The classification of drought risk is particularly significant for disaster risk assessment and mitigation.Utilizing meteorological data of 73 stations from 1979 to 2013,historical drought disaster records with potato yield data and social attribute data,the extent of the potato drought disaster in Inner Mongolia is investigated.Results from the use of GIS spatial analysis and the fuzzy clustering method are pertained from the aspects of drought-causing factor risk indices,the vulnerability of disaster-bearing bodies,the exposure of the disaster environment and the evaluation index system of disaster prevention and mitigation capacity in the region.Based on the regression model,thresholds for light drought,medium drought and heavy drought are derived from the regression model portrayed as linear between the percentage of negative anomalies of precipitation and the relative meteorological yield in