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首页> 外文学位 >Karst Drainage-Basin Analysis Using Water-Level Data and Hydrograph Decomposition Techniques at the Savoy Experimental Watershed, Savoy, Arkansas.
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Karst Drainage-Basin Analysis Using Water-Level Data and Hydrograph Decomposition Techniques at the Savoy Experimental Watershed, Savoy, Arkansas.

机译：在阿肯色州萨沃伊萨沃伊实验流域，利用水位数据和水文分解技术进行岩溶流域盆地分析。

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摘要

The Savoy Experimental Watershed is a University of Arkansas property that encompasses about 1250 ha in the mantled-karst of the Springfield Plateau in the southwestern Ozark Plateaus. The SEW is a long-term and multidisciplinary field station for research on hydrology and animal waste management in the Ozarks.;Parameters needed to further refine and expand the existing conceptual model were identified for this study. A series of wells and springs (6) that transect the study area were selected and monitored using automated data loggers continuously for a period of one year. The goal of this study was to develop a simple methodology for deriving hydrologic budget information about a shallow, mantled-karst aquifer using hydrograph data.;Recession limbs of springs monitored at the SEW exhibited master depletion curves with linear, concave, and convex forms. Traditional karst-spring hydrograph decomposition techniques using exponential curve fitting can identify up to three straight-line segments. In some instances, the intermediate slope (or recession coefficient) is steeper than the initial slope, producing a convex form on the master depletion curve.;Whereas there are ample recession methodologies described in the literature, almost all of these approaches are designed for springs that exhibit zero- or first-order decay and are not applicable to recession coefficients that increase with time. To the knowledge of the author, there has been only one other method proposed for master depletion curves that exhibit a convex form that required either the collection (or assumption) of many hydrological and climatological parameters that are typically not available or cost-effective for most spring-basin studies.;A new method is proposed herein that only requires data about discharge over time to simulate the recession of linear, concave, and convex master depletion curves. Integration of the area under the two components allows for the volume of water drained from the quickflow and baseflow periods to be determined as well as the dynamic volume (storage). Comparison of these volume determinations allows for the relative importance of the quickflow and baseflow components to be quantified and reveals information about the moderating effects of the vadose zone and the transmissive properties of the phreatic zone.
机译：萨沃伊实验集水区是阿肯色大学的一项财产，占地约1250公顷，位于奥索卡高原西南部的斯普林菲尔德高原的喀斯特地貌。 SEW是奥萨克斯地区水文和动物废物管理研究的一个长期，多学科的野外站;该研究确定了进一步完善和扩展现有概念模型所需的参数。选择了一系列横穿研究区域的井和泉水（6），并使用自动数据记录仪连续监测了一年的时间。这项研究的目的是开发一种简单的方法来使用水文学数据得出浅层，地幔岩溶含水层的水文预算信息。SEW监测的泉水的后退肢体显示出线性，凹形和凸形的主损耗曲线。传统的利用指数曲线拟合的岩溶泉水位线分解技术最多可以识别三个直线段。在某些情况下，中间斜率（或后退系数）比初始斜率陡，在主损耗曲线上产生凸形。尽管文献中描述了足够的后退方法，但几乎所有这些方法都是为弹簧设计的。呈现零阶或一阶衰减并且不适用于随时间增加的衰退系数。据作者所知，仅提出了另一种方法来显示呈凸形的主损耗曲线，这需要收集（或假设）许多水文和气候参数，这些参数通常对于大多数人来说是不可用的或具有成本效益的在此提出了一种新方法，该方法仅需要有关放电随时间变化的数据，即可模拟线性，凹形和凸形主损耗曲线的后退。这两个部分下方区域的整合允许确定从快速流动期和基本流动期排出的水量以及动态量（存储量）。这些体积确定值的比较允许量化快速流动和基本流动分量的相对重要性，并揭示有关渗流区的缓和作用和潜水区的透射特性的信息。

著录项

  • 作者

    Pennington, Darrell W.;

  • 作者单位

    University of Arkansas.;

  • 授予单位 University of Arkansas.;
  • 学科 Hydrology.
  • 学位 M.S.
  • 年度 2010
  • 页码 223 p.
  • 总页数 223
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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