...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ground water >Channel Representation in Physically Based Models Coupling Groundwater and Surface Water: Pitfalls and How to Avoid Them
【24h】

Channel Representation in Physically Based Models Coupling Groundwater and Surface Water: Pitfalls and How to Avoid Them

机译：地下水与地表水耦合的物理模型中的通道表示：陷阱和如何避免它们

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

Recent models that couple three-dimensional subsurface flow with two-dimensional overland flow are valuable tools for quantifying complex groundwater/stream interactions and for evaluating their influence on watershed processes. For the modeler who is used to defining streams as a boundary condition, the representation of channels in integrated models raises a number of conceptual and technical issues. These models are far more sensitive to channel topography than conventional groundwater models. On all spatial scales, both the topography of a channel and its connection with the floodplain are important. For example, the geometry of river banks influences bank storage and overbank flooding; the slope of the river is a primary control on the behavior of a catchment; and at the finer scale bedform characteristics affect hyporheic exchange. Accurate data on streambed topography, however, are seldom available, and the spatial resolution of digital elevation models is typically too coarse in river environments, resulting in unrealistic or undulating streambeds. Modelers therefore perform some kind of manual yet often cumbersome correction to the available topography. In this context, the paper identifies some common pitfalls, and provides guidance to overcome these. Both aspects of topographic representation and mesh discretization are addressed. Additionally, two tutorials are provided to illustrate: (1) the interpolation of channel cross-sectional data and (2) the refinement of a mesh along a stream in areas of high topographic variability.
机译：将三维地下流与二维陆上流耦合在一起的最新模型，对于量化复杂的地下水/河流相互作用以及评估其对流域过程的影响而言，是有价值的工具。对于习惯于将流定义为边界条件的建模者，集成模型中通道的表示提出了许多概念和技术问题。与传统的地下水模型相比，这些模型对通道地形更为敏感。在所有空间尺度上，渠道的地形及其与洪泛区的联系都很重要。例如，河岸的几何形状会影响河岸的蓄水和河岸泛滥。河流的坡度是对流域行为的主要控制；在较小的规模下，床形特征会影响水交换。但是，很少有关于河床地形的准确数据，并且数字高程模型的空间分辨率在河流环境中通常太粗糙，导致河床不现实或起伏不定。因此，建模人员会对可用的地形执行某种手动的操作，但通常会很麻烦。在这种情况下，本文确定了一些常见的陷阱，并提供了克服这些陷阱的指导。地形表示和网格离散化这两个方面都得到了解决。另外，提供了两个教程来说明：（1）通道横截面数据的插值和（2）在高地形变化率区域中沿流细化网格。

著录项

  • 来源
    《Ground water》 |2014年第6期|827-836|共10页
  • 作者

    Daniel Kaeser; Tobias Graf; Fabien Cochand; Rob McLaren; Rene Therrien; Philip Brunner;

  • 作者单位

    Centre for Hydrogeology and Geothermics, 11 rue Emile-Argand, Neuchatel 2000, Switzerland,Centre d'Hydrogeologie et de Geothermie, Universite de Neuchatel, 11 rue Emile-Argand, Neuchatel, 2000, Switzerland;

    Departement de Geologie et de Genie Geologique, Universite Laval, 1065 Avenue de la Medecine, Quebec, G1V 0A6, Canada;

    Departement de Geologie et de Genie Geologique, Universite Laval, 1065 Avenue de la Medecine, Quebec, G1V 0A6, Canada;

    Golder Associates Limited, 50 Crimea St, Guelph, ON N1H, Canada;

    Departement de Geologie et de Genie Geologique, Universite Laval, 1065 Avenue de la Medecine, Quebec, G1V 0A6, Canada;

    Centre d'Hydrogeologie et de Geothermie, Universite de Neuchatel, 11 rue Emile-Argand, Neuchatel, 2000, Switzerland;

  • 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