...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of geophysics and engineering >A hydrogeophysical study to estimate water seepage from northwestern Lake Nasser, Egypt
【24h】

A hydrogeophysical study to estimate water seepage from northwestern Lake Nasser, Egypt

机译：水文地球物理研究，估计埃及西北部纳赛尔湖的渗水情况

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

Estimating the water seepage from Lake Nasser, southern Egypt, into the adjacent Nubian sandstone aquifer is one of the main factors influencing the water balance of the lake. Up till now, there has been no information about seepage values, particularly in the northwestern part of the lake, due to a complete absence of boreholes. The present study is an approach using the time domain electromagnetic (TDEM) technique to estimate the hydraulic parameters of the shallow Nubian sandstone aquifer which are essential in water seepage calculations. The average porosity of the Nubian sandstone aquifer is calculated using bulk resistivities deduced from a TDEM model by applying the Archie formula. As calculated porosity values are consistent with laboratory measurements, accordingly the void ratio is estimated from the calculated porosity. The calculated void ratio in combination with the grain size diameter of the shallow part of the Nubian sandstone is used to estimate hydraulic conductivity. Then Darcy's low is applied to calculate the seepage value of the lake water in the adjacent Nubian sandstone aquifer. The main result of the current study shows that the anticipated water seepage value is 2.6 x 10~6 m~3 yr~(-1). This value seems reasonable in comparison with the total seepage value inferred from isotope studies around Lake Nasser.
机译：估计从埃及南部的纳赛尔湖到相邻的努比亚砂岩含水层的渗水量是影响该湖水平衡的主要因素之一。到目前为止，由于完全没有钻孔，因此还没有关于渗流值的信息，特别是在湖的西北部。本研究是一种使用时域电磁（TDEM）技术估算努比亚浅层砂岩含水层水力参数的方法，这对于渗流计算至关重要。努比亚砂岩含水层的平均孔隙度是通过应用阿奇公式从TDEM模型推导的体电阻率来计算的。由于计算出的孔隙率值与实验室测量值一致，因此根据计算出的孔隙率估算空隙率。计算出的孔隙率与努比亚砂岩浅层部分的粒径相结合，可用来估算水力传导率。然后应用达西低点计算邻近努比亚砂岩含水层中湖水的渗流值。目前研究的主要结果表明，预期的渗水值为2.6 x 10〜6 m〜3 yr〜（-1）。与从纳赛尔湖周围的同位素研究推断出的总渗流值相比，该值似乎是合理的。

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