• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>other >Temporal Variation of Streamflow Sediment Load and Their Relationship in the Yellow River Basin China
【2h】

Temporal Variation of Streamflow Sediment Load and Their Relationship in the Yellow River Basin China

机译：黄河流域径流泥沙量的时间变化及其关系。

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Variation of streamflow and sediment load in the Yellow River basin has received considerable attention due to its drastic reduction during the past several decades. This paper presents a detailed investigation on the changes of streamflow and sediment load from 1952 to 2011 using monthly observations at four gauging stations along the Yellow River. The results show significant decreasing trends for both streamflow and sediment load at all four gauging stations over the past 60 years. The wavelet transform demonstrated discontinuous periodicities from 1969 to 1973 and after 1986 due to the construction of large reservoirs and implementation of numerous soil and water conservations practices. The sediment rating curves with the power-law function was applied to investigate the relationship between discharge and sediment load. The results indicate distinct variations of the relationship between streamflow and sediment and implied significant hydro-morphological changes within different periods. The reducing sediment supply from the source region and the increased erosive power of the river are detected at Lanzhou station, while the decrease of the transport capacity at Toudaoguai is caused by severe siltation. Significant changes in the relationship between streamflow and sediment load are found at Huayuankou and Gaocun stations, which are largely induced by evident sediment income and trapping effects of large reservoirs. It is estimated that numerous reservoirs have strongly altered the regime and magnitude of streamflow and trapped large amount of sediment, leading to severe siltation and evident reduction of their total volumes. A decrease in precipitation, incoming water from the upper reaches, soil and water conservation measures as well as water consumption contribute most to the significant reduction of streamflow. The decrease of sediment load mainly resulted from various soil and water conservation measures and trapping in reservoirs from 1986 to 2011.
机译：黄河流域的水流量和泥沙负荷的变化由于过去几十年的急剧减少而受到了广泛的关注。本文利用黄河沿岸四个计量站的月度观测资料，对1952年至2011年的水流和泥沙负荷变化进行了详细调查。结果表明，在过去60年中，所有四个计量站的流量和泥沙负荷均呈显着下降趋势。小波变换在1969年至1973年以及1986年以后表现出不连续的周期性，这是由于建造了大型水库以及实施了许多水土保持措施。应用具有幂律函数的泥沙定额曲线，研究了流量与泥沙负荷之间的关系。结果表明，水流与泥沙之间的关系存在明显的变化，并暗示了不同时期内水形态的显着变化。在兰州站发现源区的沉积物供应减少，河道的侵蚀力增加，而头道拐的运输能力下降是由于严重的淤积造成的。在花园口站和高村站，水流与泥沙量之间的关系发生了显着变化，这主要是由明显的泥沙收入和大型水库的诱集作用引起的。据估计，许多水库极大地改变了水流的形式和大小，并截留了大量的沉积物，导致严重的淤积并明显减少了它们的总量。降水量减少，上游流入的水量减少，水土保持措施以及耗水量是造成溪流显着减少的最大原因。泥沙负荷减少主要是由于1986年至2011年采取的各种水土保持措施和水库中的圈闭。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号