...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ground water >Assessing Lakebed Hydraulic Conductivity and Seepage Flux by Potentiomanometer
【24h】

Assessing Lakebed Hydraulic Conductivity and Seepage Flux by Potentiomanometer

机译：用电位计评估湖床水力传导率和渗透通量

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

Potentiomanometers (PMs) are commonly used to determine flux directions across interfaces between surface waters and aquifers. We describe a complementary function: estimating small-scale hydraulic conductivity (K) in a lakebed, using the constant-head injection test (CHIT) by Cardenas and Zlotnik (2003) with the PM designed by Winter et al. (1988). A piezometer with a small screen is inserted into the lakebed. Local head potential is obtained by measuring the head difference between the test point and the aquifer interface. The piezometer is then used for water injection. This technique is illustrated by measurements taken from Alkali Lake in the Sand Hills, Nebraska, United States. Lakebed K and seepage fluxes ranged from 0.037 to 0.090 m/d and Darcy velocities ranged from 0.004 to 0.027 m/d. Results were consistent with the supplementary data gathered using a modified CHIT and a cone penetrometer. The compact size of the device and the small volumes used for injection enable this method to estimate lakebed K values as low as 0.01 to 0.1 m/d, a range seldom explored in lake-aquifer interface systems.
机译：电位计（PMs）通常用于确定地表水和含水层之间界面的通量方向。我们描述了一种补充功能：使用由Cardenas和Zlotnik（2003）进行的恒压注入试验（CHIT）和由Winter等人设计的PM来估算湖床中的小规模水力传导率（K）。 （1988）。带有小屏幕的测压计插入湖床中。通过测量测试点与含水层界面之间的水头差来获得局部水头电势。然后将压力计用于注水。这项技术通过从美国内布拉斯加州沙丘的碱湖进行测量得到了说明。湖床K和渗流通量范围为0.037至0.090 m / d，达西速度范围为0.004至0.027 m / d。结果与使用改进的CHIT和锥形渗透仪收集的补充数据一致。该装置的紧凑尺寸和用于注入的小体积使该方法能够估算低至0.01至0.1 m / d的湖床K值，而在湖水层界面系统中很少探索该范围。

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