• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Canadian Water Resources Journal >Development and testing of a modified transparent velocity-head rod for stream discharge measurements
【24h】

Development and testing of a modified transparent velocity-head rod for stream discharge measurements

机译：用于流量测量的改进型透明速度头杆的开发和测试

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Accurate measurements of streamflow velocity and discharge can be challenging due to the technical nature of the instruments and often-associated high cost. Velocity-head rods measure the head difference in water flowing around an obstacle (i.e. the head rod) and use hydraulic theory to estimate water velocity. This article presents the construction and testing of a modified transparent velocity-head rod (mTVHR). Approximately 2400 pairs of mTVHR and SonTek FlowTracker (FT, acoustic Doppler) measurements were made on 31 dates, by seven operators at 14 sites. This data set allowed for the development of a calibrated relationship for velocity, for the investigation of accuracy among multiple users and for the definition of stream conditions where mTVHR use is appropriate. While there was evidence of differences between users for measurements of velocity-head and water depth, these differences were small and did not greatly influence discharge estimates derived using the instrument. While statistical analysis determined a minimum measureable velocity-head value of 1 mm, field experience with the instrument indicates the mTVHR should be used to measure velocity-head values greater than 2 mm. The maximum water depth recommended is approximately 0.75 m due to the 1-m height of the instrument and the difficulty of safe operation at moderately fast streamflow velocities. Turbulent streams and/or streams with large bed materials are not appropriate for use of the mTVHR due to rapid velocity-head fluctuations. The mTVHR is an accurate instrument for measuring streamflow velocity, depth and discharge. In addition, its ease of use, low cost (< CAN $100), and durability make it an attractive option for streamflow measurement.
机译：由于仪器的技术特性以及通常伴随的高昂成本，因此，精确测量流速和流量可能具有挑战性。测速杆测量绕障碍物（即测杆）流动的水的水头差，并使用水力理论估算水速。本文介绍了改进的透明速度头杆（mTVHR）的构造和测试。 31个日期，由14个站点的7名操作员进行了约2400对mTVHR和SonTek FlowTracker（FT，声学多普勒）测量。该数据集允许开发速度的校准关系，调查多个用户之间的准确性以及定义适合使用mTVHR的流条件。尽管有证据表明用户在测量水头和水深方面存在差异，但这些差异很小，并且不会严重影响使用该仪器得出的流量估算值。统计分析确定最小可测速度头值为1 mm，但仪器的现场经验表明，应使用mTVHR测量大于2 mm的速度头值。由于仪器的高度为1-m，并且在中等流速下难以安全操作，因此建议的最大水深约为0.75 m。由于快速的水头波动，湍流和/或具有大床物质的流不适合使用mTVHR。 mTVHR是用于测量流速，深度和流量的精确仪器。此外，它的易用性，低成本（<100加元）和耐用性使其成为流量测量的有吸引力的选择。

著录项

  • 来源
    《Canadian Water Resources Journal》 |2016年第3期|372-384|共13页
  • 作者

    Pike Robin G.; Redding Todd E.; Schwarz Carl J.;

  • 作者单位

    Prov British Columbia, BC Minist Environm, Victoria, BC, Canada;

    Okanagan Coll, Dept Geog Earth & Environm Sci, Penticton, BC, Canada;

    Simon Fraser Univ, Dept Stat & Actuarial Sci, Burnaby, BC, Canada;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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