摘要
新时代水土保持工作治理能力提升是生态文明建设的重要内容之一。采用Mann-Kendall非参数检验、双累积曲线和Pearson's相关分析等方法对1961-2021年乌江(武隆站)水沙变化进行了分析,并探讨了研究区对其水沙变化的关系响应。研究结果表明:乌江(武隆站)年径流量、年输沙量和悬移质中值粒径D50都呈现下降减少趋势,而仅年输沙量通过了显著性减少统计检验,水沙变化分为6个时间段的显著线性关系,特别是2005—2021年。研究区年降水量呈未显著减少趋势,但2000—2021年降水变率值超过20%的年份是前40a的3倍;2000—2021年复种指数与悬移质中值粒径D50存在显著的正相关系数r=0.406,而林地面积与年输沙量存在显著的Pearson's负相关系数r=-0.233。2005年后期乌江(武隆站)水沙变化与研究区输沙来源因素存在显著相关关系。为乌江流域水环境系统治理和综合施策提供指导价值。
It is one of the important contents of ecological civilization construction for improving of soil and water conservation management capacity in the new era.By Mann-Kendall non-parametric test,and double accumulation curve and Pearson's correlation analysis,which were used to analyze the changes of water and sand in Wujiang River(Wulong station)from 1961 to 2021,and based on results,the paper discussed relationship between the changes of water and sand and conservation of water and soil in the study area.The results indicated that for annual runoff,annual sand and median particle diameter D50,these all showed a decreasing trend,while only sand showed significant reduction trend by passed the statistical test,changes of water and sand might be divide into six time period of significant linear relationships,particularly might be from 2005 to 2021.The annual precipitation showed no significant decrease trend in the study area,but number of precipitation variation value over 20%was three times that of the previous 40 years for 2000-2021years;from 2000 to 2021,between multiple-cropping index and median particle diameter D50,there was a significant Pearson's positive correlation coefficient r=0.406,while between woodland area and sand mass,there was significant Pearson's negative correlation coefficient r=-0.233.There is a significant correlation between the water and sediment change in Wujiang River(Wulong Station)in late 2005 and the source factors of sediment transport in the study area.It provides guiding value for water environment system management and comprehensive policies in Wujiang River basin.
作者
成六三
Cheng Liusan(Chongqing Engineering Vocational and Technical College,Chongqing 402260,China)
出处
《黑龙江水利科技》
2024年第12期34-38,共5页
Heilongjiang Hydraulic Science and Technology
基金
重庆市教委课题:武隆区退耕还林工程生态经济耦合效应研究(KJQN202203409)
渝西红层丘陵区农村机井供水水质演变机理研究(KJQN202103406)
新时代渝西红层丘陵区民生“打井工程”的农户福祉评价研究(22SKGH573)。
关键词
水土保持
极端气候
地质灾害
乌江流域
conservation of water and soil
extreme climate
geologic hazard
Wujiang river basin
作者简介
成六三(1977-),男,陕西蒲城人,副教授,高级工程师,博士,研究方向为环境地质评价。
