China 1 Climate change 1 Dongjiang Basin 1 Dongjiang rivers 1 Drought 1 Drought conditions 1 Drought risks 1 Guangdong 1 Hydrologic drought 1 Hydrologic droughts 1 Land types 1 Land use 1 Land use and cover change 1 Land use and cover changes 1 Planning 1 Principal component analysis 1 Regression analysis 1 River basins 1 Runoff 1 Runoff indices 1 Spatially-variant 1 Standardized runoff index Standardized runoff index (SRI) 1 Watersheds 1 Weather forecasting 1 development strategy 1 drought 1 grassland 1 heterogeneity 1 land cover 1