水土保持研究2024，Vol.31Issue(1)：151-158,8.DOI:10.13869/j.cnki.rswc.2024.01.013
罗玉沟流域水沙变化趋势及影响因素
Trends of Runoff and Sediment and Their Impact Factors in Luoyugou Watershed
摘要
Abstract
[Objective]The aims of this study are to explore trends and influencing factors of water and sedi-ment changes in small watersheds,and to provide reference basis for soil erosion control and soil conserva-tion measures in loess hilly and gully region.[Methods]The Spearman rank correlation test,cumulative anomaly,and double cumulative curve method were used to analyze the trend and evolution process of precip-itation,runoff,and sediment transport in Luoyugou watershed of loess hilly and gully region from 1986 to 2016.[Results](1)The trend change of annual precipitation was not significant in Luoyugou basin from 1986 to 2016.The changes in annual runoff and sediment transport in the watershed had obvious stages,with the year 1993 as the boundary,and the annual runoff and sediment transport showed a significant downward trend.(2)Precipitation and soil and water conservation measures affected the annual runoff and sediment transport in Luoyugou watershed,and their influence on the changes of water and sediment varied with dif-ferent precipitation levels.Soil and water conservation measures reduced the runoff and sediment transport in dry years of the watershed significantly.(3)The contribution rates of soil and water conservation measures to the reduction of annual runoff and annual sediment transport were 83.50％and 80.97％,respectively.[Conclusion]In the absence of significant changes in precipitation,soil and water conservation measures play a leading role in reducing the annual runoff and sediment transport in Luoyugou watershed.The comprehen-sive management of soil and water conservation has the greatest impact on the runoff and sediment transport in dry year.关键词
黄土丘陵沟壑区/罗玉沟流域/水沙变化/影响因素Key words
loess hilly and gully region/Luoyugou watershed/trends of streamflow and sediment/impact factors分类
农业科技引用本文复制引用
秦瑞杰,李平,肖培青,马田铂,王柯凡..罗玉沟流域水沙变化趋势及影响因素[J].水土保持研究,2024,31(1):151-158,8.基金项目
国家自然科学基金黄河水科学联合基金(U2243210) （U2243210）
黄河流域水土保持(12616201453102) （12616201453102）
黄委优秀青年人才科技项目(HQK-202303) （HQK-202303）
