Integrated index construction and zoning of drought risk:a case study of winter wheat area in Hebei Province

Taking winter wheat growing areas in Hebei Province as example,and based on the natural water deficiency rate index,precipitation anomaly percentage index and drought resistance index,this paper constructed an integrated drought risk index,and carried out risk zoning.Also,by use of the percentage reduction of the yield of winter wheat due to drought and the regional historical drought occurrence frequency,the paper compared and validated the integrated drought risk index and risk zoning results.The results showed that the constructed integrated drought risk index in this paper is applicable for winter wheat drought risk zoning,and could give a reference to risk assessment and prediction of yield reduction of winter wheat caused by drought.