生态学杂志2024，Vol.43Issue(3)：861-868,8.DOI:10.13292/j.1000-4890.202403.006
赣江上游章水流域水沙变化及其归因分析
Variations of runoff and sediment and its attribution analysis in Zhangshui watershed of the upper reaches of Ganjiang River
摘要
Abstract
The runoff and sediment situation in the watershed has changed with climate change and the intensifica-tion of human activities.Quantitative analysis of the runoff and sediment effects of precipitation variation and human activities is a hot topic in current water science research.Based on the hydrological and meteorological observation data of Zhangshui watershed in the upper reaches of Ganjiang River from 1961 to 2020,we quantitatively analyzed the contribution rate of precipitation variation and human activities to the changes of runoff and sediment,and the critical value of the runoff and sediment effect of human activities to the annual precipitation response by using the slope change ratio of accumulative quantity and empirical statistical analysis.The results showed that precipitation and runoff showed a non-significant downward trend(P＞0.05),and the sediment transport showed a significant downward trend(P＜0.001).The abrupt change of precipitation and runoff was in 2003,and the abrupt change of sediment was in 1998.The contribution rates of precipitation variation and human activities to runoff reduction were 10.7％and 89.3％,and to sediment reduction were 3.5％and 96.5％,respectively.The critical values of runoff and sediment reduction effects of human activities in response to annual precipitation were 1170 mm and 858 mm,respectively.Our results could provide scientific basis for watershed ecological construction and optimal management of water and land resources.关键词
章水流域/降水变化/人类活动/水沙变化/临界值Key words
Zhangshui watershed/precipitation variation/human activity/runoff and sediment change/critical value引用本文复制引用
张婷,刘士余,盛菲,李俊,余敏琪..赣江上游章水流域水沙变化及其归因分析[J].生态学杂志,2024,43(3):861-868,8.基金项目
国家自然科学基金项目(31960331)资助. （31960331）
