首页> 外文期刊>Geodinamica Acta >Measuring bedload in gravel-bed mountain rivers: averaging methods and sampling strategies
【24h】

Measuring bedload in gravel-bed mountain rivers: averaging methods and sampling strategies

机译:测量砾石床山区河流的床荷:平均方法和采样策略

获取原文
获取原文并翻译 | 示例
           

摘要

A dataset of more than 1,000 individual bedload samples coupled with hydraulic flow variables (water depth and velocity) was collected on two high mountain rivers the torrent de Saint Pierre, a proglacial gravel-bed river in the French Alps, in July 2002 and the Urumqi River, in the Chinese Tianshan Mountains during summer 2005 and 2006. Analysis of the dataset leads to question the usual section averaged sampling procedure of bedload using Helley-Smith type bedload sampler. It is shown that this procedure is inadequate to catch the full range of flow conditions. Comparison between moving averages on individual datasets and section averages furthermore show that this technique can lead to significantly different rating curves with predictions differing by more than an order of magnitude. Single point sampling is shown to be much more adequate than multiple point sampling and section averaging provided the dataset is sufficiently large.
机译:2002年7月,在法国阿尔卑斯山的一条流冰砾石河床圣皮埃尔山洪流和两条乌鲁木齐的两条高山河流上,收集了1000多个单独的床荷样品以及液压流量(水深和流速)的数据集。 2005年夏季和2006年夏季,中国天山的一条河流。对数据集的分析引起了人们对使用Helley-Smith型床荷取样器进行的剖面平均取样程序的质疑。结果表明,该程序不足以捕获整个流动条件。各个数据集上的移动平均线与断面平均线之间的比较进一步表明,该技术可以导致评级曲线显着不同,而预测的差异超过一个数量级。如果数据集足够大,则单点采样比多点采样和截面平均要好得多。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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