水土保持研究2026，Vol.33Issue(4)：86-93,8.DOI:10.13869/j.cnki.rswc.2026.04.029
大型水资源配置工程堆积体坡面植被覆盖度对氮磷流失的影响
Influence of vegetation coverage on nitrogen and phosphorus losses on slopes of engineering deposits in large-scale water resources allocation projects
摘要
Abstract
[Objective]This study aims to explore the correlations between runoff volume,concentrations and loss rates of TN and TP under varying vegetation coverage levels,so as to address the nitrogen and phosphorus loss issue on slopes of engineering deposit pertaining to large-scale water resources allocation projects.[Methods]Taking the engineering deposit of the Yijia Courtyard large-scale water resources allocation project in Yongchuan,Chongqing as the research object,this study conducted field artificial water scouring experiments on slopes with three vegetation coverage levels:low(4%),medium(12%),and high(50%)through field investigations,and investigated the characteristics of nitrogen and phosphorus loss under different vegetation coverage on the slopes of engineering deposits in large-scale water resources allocation projects.[Results]Under low and high vegetation coverage,the runoff rate exhibited a fluctuating increasing trend with the scouring duration,while under medium vegetation coverage,it showed a fluctuating trend of first decreasing and then increasing.There was no significant difference in the average runoff rate among the three vegetation coverage levels(p>0.05).The average concentrations and average loss rates of total nitrogen(TN)and total phosphorus(TP)all showed a trend of first increasing and then decreasing with the increase in vegetation coverage.Under the three vegetation coverage levels,the concentrations and loss rates of TN and TP presented a fluctuating decreasing trend with the scouring duration.The average concentrations and average loss rates of TN and TP under medium coverage were significantly higher than those under low and high coverage(p<0.05),with increases of 56.38%,60.21%and 57.62%,54.50%,respectively.The nitrogen and phosphorus loss rates were mainly driven by concentration.[Conclusion]Under different vegetation coverage levels,the runoff rate exhibits a fluctuating increasing trend;the nitrogen and phosphorus loss rate is the highest under medium vegetation coverage,while low and high vegetation coverage can effectively reduce the nitrogen and phosphorus loss rate on engineering deposit slopes.关键词
大型水资源配置工程/植被覆盖/放水冲刷/氮磷流失Key words
large-scale water resources allocation projects/vegetation coverage/artificial water scouring/nitrogen and phosphorus loss分类
农业科技引用本文复制引用
熊伶,蒲力,温丽娜,李天阳..大型水资源配置工程堆积体坡面植被覆盖度对氮磷流失的影响[J].水土保持研究,2026,33(4):86-93,8.基金项目
重庆市水利科技项目"大型水资源配置工程不同水土保持措施配置技术及生态环境效益研究"(CQSLK-2023022) （CQSLK-2023022）
