文章摘要
张冠华, 喻志强, 易亮, 雷旭, 钱峰, 李建明, 孙宝洋.近70年长江干流寸滩站以上流域水沙关系[J].水土保持学报,2021,35(1):79~84
近70年长江干流寸滩站以上流域水沙关系
Variation of Water-Sediment Relationship and the Driving Factors Above the Cuntan Station of the Yangtze River Main Stream in Recent 70 Years
投稿时间:2020-07-22  
DOI:10.13870/j.cnki.stbcxb.2021.01.011
中文关键词: 水沙关系曲线  双累积曲线  悬移质输沙量  驱动因素  人类活动
英文关键词: sediment rating curve  double mass curve  suspended sediment load  driving factor  human activities
基金项目:国家自然科学基金项目(41877082,41701316,51909011);水利技术示范项目(SF-201905);中央级公益性科研院所基本科研业务费项目(CKSF2019410TB)
作者单位E-mail
张冠华1,2, 喻志强3, 易亮4, 雷旭4, 钱峰1,2, 李建明1,2, 孙宝洋1,2 1. 长江科学院水土保持研究所, 武汉 430010

2. 水利部山洪地质灾害防治工程技术研究中心
, 武汉 430010

3. 长江科学院科研计划处
, 武汉 430010

4. 中南安全环境技术研究院股份有限公司
, 武汉 430071 
shanxi2002stbc@126.com 
摘要点击次数: 65
全文下载次数: 67
中文摘要:
      以长江干流寸滩水文站以上流域为研究对象,基于1953-2018年的实测水沙资料,采用线性回归、Mann-Kendall趋势检验和水沙关系曲线分析径流、输沙的时间趋势及其关系变化,并采用双累积曲线法分析水沙变化的驱动因素。结果表明:寸滩站以上流域多年平均径流量为3 425亿m3,多年平均输沙量为3.61亿t;多年平均月径流量为294.8亿m3,多年平均月输沙量为3 013万t,且主要分布在6-10月,分别占年径流泥沙总量的70%和95%以上。趋势分析显示,流域年降雨量和径流量变化趋势不明显,年输沙量呈极显著减小趋势;月径流量在1-4月显著增加,其他月份变化不显著,而各月输沙量均呈显著减少趋势。水沙关系曲线均可用幂函数拟合,拟合参数受时间尺度影响,统计检验显示悬移质输沙量实测值与水沙关系曲线的估算值差异不显著。双累积曲线分析发现水利工程建设和水土保持等人类活动是寸滩水文站输沙减少的主要原因,其作用占69%~93%,其中2000年以来人类活动的贡献超过90%。
英文摘要:
      Based on the measured runoff and sediment data of Cuntan hydrologic station that at upper situating Yangtze River's main stream, this study analyzed the temporal trends of runoff and sediment transport as well as the variations of their relationships during 1953-2018 by statistical methods including linear regression, Mann-Kendall test, and sediment rating curve. Double mass curve was further used to analyze the driving factors of water and sediment variation. The results showed that the average annual water and sediment discharge of Cuntan station was 342.5 billion m3 and 361 million tons, respectively. The average monthly water and sediment discharge was 29.48 billion m3 and 30.13 million tons, respectively, which mainly distributed in June to October, accounting for more than 70% and 95% of the total annual runoff and sediment, respectively. The trend analysis indicated that the variation trends of annual precipitation and runoff were not obvious, however, annual sediment discharge showed a significantly decreasing trend. The monthly runoff increased significantly from January to April and the changes in other months were not significant, while the monthly sediment discharge showed a significantly decreasing trend in each month. In this study, the relationships between water and sediment could be fitted by power functios, and the fitting parameters were affected by the time scale. Statistical test detected that there was no significant difference between the measured value suspended sediment load and the estimated values by sediment rating curve. Double mass curve analysis found that human activities, such as water conservancy construction and soil and water conservation, were the main factors driving the sediment reduction in Cuntan station, accounting for 69%~93% in different decades, among which human activities had contributed more than 90% since 2000.
查看全文   查看/发表评论  下载PDF阅读器
关闭