School of Water Resources North China University of Water Resources and Electric Power Zhengzhou 450045 China;
School of Water Resources North China University of Water Resources and Electric Power Zhengzhou 450045 China;
School of Water Resources North China University of Water Resources and Electric Power Zhengzhou 450045 China;
Construction and Administration Bureau of South-to-North Water Diversion Middle Route Project Beijing 100038 China;
Cusp catastrophe; Drought degree; Crop growth period; Soil moisture content; Maize;