文献类型：期刊文献

英文题名：Precipitation, landscape pattern and sediment connectivity differ in their effects on runoff and sediment transport

作者：Tian, Changyuan[1] Gao, Shenghua[2] Zhang, Xudong[2] Zhang, Yi[1] Li, Jianing[1] Zha, Tonggang[1]

第一作者：Tian, Changyuan

通信作者：Zha, TG[1]

机构：[1]Beijing Forestry Univ, Sch Soil & Water Conservat, Beijing 100083, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China

年份：2025

卷号：62

外文期刊名：JOURNAL OF HYDROLOGY-REGIONAL STUDIES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001702982600002)】；

基金：This research was supported by the National Key Research and Development Program (No. 2022YFF130300204).

语种：英文

外文关键词：Landscape patten; Sediment connectivity; Runoff; Sediment; Partial least squares-structural equation; Yangtze River Basin

摘要：Study region: Four major sub-basins of Yangtze River, China Study focus: Precipitation, landscape pattern and sediment connectivity significantly influence hydrological processes within a basin. However, the large-scale impacts of landscape patterns and sediment connectivity on watershed runoff and sediment transport remain poorly understood. This study focuses on the runoff and sediment changes in the four sub-watersheds of the Yangtze River from 2001 to 2022 and their comprehensive response to precipitation, landscape pattern and sediment connectivity, to elucidate the mechanisms through which climate and land use changes affect hydrological processes. New hydrological insights for the region: Our findings showed that precipitation and landscape pattern predominantly affects basin runoff, whereas sediment connectivity primarily influences sediment yield. Precipitation and landscape pattern accounted for 70.6 % of the variation in runoff, while precipitation, landscape pattern, sediment connectivity, and runoff jointly explained 43.2 % of the variation in sediment yield. Among the observed variables, the mean patch fractal dimension (FRAC_MN) contributed the most to the landscape pattern, precipitation erosivity contributed the most to the precipitation factor, and the maximum value of the sediment connectivity index (ICmax) contributed the most to sediment connectivity factor.