Shaanxi Land Engineering and Technology Research Institute Co. Ltd. Xi an 710075 ChinaShaanxi Land Engineering Construction Group Co. Ltd. Xi an 710075 ChinaKey Laboratory of Degraded and Unused Land Consolidation Engineering Ministry of Natural Resources Xi an 710075 ChinaShaanxi Land Consolidation Engineering Technology Research Center Xi an 710075 China;
Three-River Headwater Region; Ecological environment; Humanistic environment; Topographic heterogeneity;