River system connectivity(RSC)is closely related with water security issues,including water resources allocation,flood and drought management,and the protection and restoration of aquatic ecosystems.Currently,there is a lack of comprehensive studies evaluating RSC at a national level,and few comparisons were conducted a-mong different water resource zones.To address this gap,an RSC evaluation system is established by employing hi-erarchical analysis and the entropy weight method.The evaluation indices reflect the quantitative,structural,and hydraulic characteristics in line with the fundamental connotation of RSC.The spatial distribution map of RSC val-ues on different scales(first-grade and third-grade national water resource zoning)is plotted.Results indicate that RSC values decline progressively from southeastern to northwestern China,categorizing into low(0.07-0.38),me-dium(0.39-0.50),and high(0.51-0.78)levels.Low RSC values primarily occur in the arid inland areas of northwest China,while medium values are found in hilly regions,and high values are concentrated in the plain riv-er networks of the middle and lower reaches of the Yangtze and Huaihe River basins.This study contributes to en-hancing RSC planning and development at both regional and catchment scales.
关键词
水系连通性/水系连通性评价体系/水资源分区尺度/全国范围/水力特征
Key words
river system connectivity/evaluation system of river system connectivity/scales of water resource zones/China/hydraulic characteristics
维普
万方数据