• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Uncertainty in recharge from subsidence craters at Frenchman Flat, Nevada Test Site: Impacts of initial and boundary conditions and media properties
【2h】

Uncertainty in recharge from subsidence craters at Frenchman Flat, Nevada Test Site: Impacts of initial and boundary conditions and media properties

机译：Frenchman Flat，Nevada测试场地沉降坑的补给不确定性：初始和边界条件和介质特性的影响

页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Nevada Test Site has over 400 subsidence craters formed by the collapse of overlying rock following underground nuclear tests. Under natural conditions, infiltration and recharge would not be considered likely due to infrequent precipitation events and extreme evapotranspiration. Crater U5a in Frenchman Flat was chosen for study because it intercepts significantly more drainage than surrounding craters. Vadose zone modeling was conducted to test the sensitivity of water movement to boundary and initial conditions. The effects of ponding depth was negligible but depth of wetting front movement was highly dependent on the lateral extent of the ponds. The model was insensitive to the initial conditions tested due to the extreme dryness of the soil.Field and laboratory observations provide evidence for a 63,000 m3 pond occurring on the initial crater surface. Model results predict such a wetting front reaching the water table in 30 years. Sediment deposited by this large pond, however, provides an effective barrier to future infiltration and recharge.
机译：内华达州试验场有400多个塌陷坑，是由地下核试验后上覆岩石坍塌形成的。在自然条件下，由于很少发生的降水事件和极端的蒸散作用，因此不可能考虑入渗和补给。选择法国人平地的陨石坑U5a进行研究是因为它比周围的陨石坑拦截的排水量要多得多。进行渗流区建模以测试水流对边界条件和初始条件的敏感性。池塘深度的影响可以忽略不计，但湿润前移的深度高度取决于池塘的横向范围。由于土壤极度干燥，该模型对测试的初始条件不敏感。现场和实验室观察提供了在初始火山口表面上有63,000 m3池塘的证据。模型结果预测，这种湿润锋线将在30年后到达地下水位。但是，这个大池塘沉积的沉积物为将来的渗透和补给提供了有效的屏障。

著录项

  • 作者

    Ely David Matthew;

  • 作者单位
  • 年度 1998
  • 总页数
  • 原文格式 PDF
  • 正文语种 English
  • 中图分类

相似文献

  • 外文文献
  • 中文文献
  • 专利

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