水土保持研究2024，Vol.31Issue(4)：95-104,10.DOI:10.13869/j.cnki.rswc.2024.04.031
窟野河流域水沙变化及其驱动因素
Runoff and Sediment Load Variation and Driving Factors in the Kuye River Basin
摘要
Abstract
[Objective]The aims of this study are to investigate the spatial and temporal changes of runoff and sediment load in the Kuye River Basin,to quantify the contribution of climate change and human activities to variation of runoff and sediment load,and to provide scientific basis for the rational use of water resources and the optimal allocation of soil and water conservation measures in the Kuye River Basin.[Methods]Based on the runoff,sediment load and rainfall data of Xinmiao,Wangdaohengta,Shenmu and Wenjiachuan hydrological stations in Kuye River Basin from 1960 to 2020,the spatial and temporal variation characteristics of runoff and sediment load were analyzed by the linear trend method,Mann-Kendall trend test and Pettitt mutation test,and the double mass curve was used to quantitatively analyze the contribution rate of climate change and human activities to runoff and sediment load variation in different periods.[Results]Annual runoff and sediment load in the Kuye River Basin showed a significant decreasing trend from 1960 to 2020(p＜0.01).The runoff reduction rates of Xinmiao,Wangdaohengta,Shenmu and Wenjiachuan hydrological stations were 2.4 million m3/a,3.4 million m3/a,8.1 million m3/a,10.6 million m3/a,the reduction rates of sediment load were 0.438 million t/a,0.693 million t/a,1.603 million t/a and 2.721 million t/a,respectively.The annual runoff and sediment load of each hydrological station changed abruptly both in 1979 and 1996,so the runoff and sediment load sequences could be divided into the reference period(1960-1979,P1)and the change period(1980-1996,P2;1997-2020,P3).During the study period,the average annual runoff depth and sediment load modulus of different sub-basins showed a decreasing trend,but there were differences in space.[Conclusion]The increasing human activities(water conservancy and soil conservation measures,coal mining,etc.)are the dominant factors on variation of runoff and sediment load in the Kuye River Basin.Compared with the base period,the runoff and sediment load of each hydrological station decreased in both P2 and P3 periods,and reduction was more intense in P3 period.In the P2 and P3 periods,the contribution of human activities to the reduction of runoff sediment transport was higher than that of rainfall changes.关键词
径流量/输沙量/窟野河流域/时空变化/驱动因素Key words
runoff/sediment load/Kuye River Basin/spatial-temporal change/driving factors分类
天文与地球科学引用本文复制引用
兰泽凡,耿韧,赵广举,穆兴民,田小靖,张鹏..窟野河流域水沙变化及其驱动因素[J].水土保持研究,2024,31(4):95-104,10.基金项目
内蒙古自治区科技兴蒙行动重点专项(KJXM-EEDS-2020005-01) （KJXM-EEDS-2020005-01）
国家自然科学基金(U2243211,42077076,42077075) （U2243211,42077076,42077075）
