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A method for estimating surface transient storage parameters for streams with concurrent hyporheic storage

机译：一种同时流变存储的流表面瞬态存储参数估计方法

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摘要

Application of transient storage models has become popular for characterizing hydrologic and biogeochemical processes in streams. The typical transient storage model represents exchange between the main channel and a single storage zone, essentially lumping together different exchange processes. Here we present a method to inform a transient storage model that accounts for two storage zones (2-SZ) to discriminate between surface transient storage (STS) exchange and exchange with hyporheic transient storage (HTS). This method requires that, in addition to tracer breakthrough curves from the main channel, cross-sectional stream velocity distributions and stream tracer concentration time series data from several main channel locations and adjacent representative STS zones be collected. We apply this method to a constant rate conservative tracer injection in a first-order stream and to an instantaneous slug conservative tracer injection in a fourth-order stream. The 2-SZ model simulations matched observed breakthrough curves of tracer concentration in the main channel and general STS behavior well. Additionally, we compared the optimized parameter sets of the 2-SZ model to one-storage zone model (1-SZ) simulations and found that the lumped storage terms of the 1-SZ model described the time scales of 2-SZ model HTS exchange and attributed the time scales of observed STS exchange to longitudinal dispersion. With additional field data collection efforts and data processing, this method can provide much more useful results than the 1-SZ approach to those interested in discriminating between surface and subsurface transient storage dynamics of streams, which is important for discerning processes important to the cycling and fate of biogeochemicals.
机译：瞬态存储模型的应用已成为表征流中水文和生物地球化学过程的流行方法。典型的瞬态存储模型表示主通道和单个存储区域之间的交换，实质上将不同的交换过程集中在一起。在这里，我们提出了一种通知瞬态存储模型的方法，该模型考虑了两个存储区域（2-SZ），以区分表面瞬态存储（STS）交换和低渗瞬态存储（HTS）交换。该方法要求，除了来自主通道的示踪剂穿透曲线外，还应收集来自几个主通道位置和相邻的代表性STS区域的横截面流速分布和流示踪剂浓度时间序列数据。我们将此方法应用于一阶流中的恒定速率保守示踪剂注入和四阶流中的瞬时段塞保守示踪剂注入。 2-SZ模型模拟与观察到的主通道中示踪剂浓度的突破曲线和一般STS行为相匹配。此外，我们将2-SZ模型的优化参数集与单存储区模型（1-SZ）仿真进行了比较，发现1-SZ模型的集总存储项描述了2-SZ模型HTS交换的时间尺度并将观测到的STS交换的时间尺度归因于纵向分散。通过额外的现场数据收集工作和数据处理，对于那些对区分流的表面和地下瞬态存储动力学感兴趣的人员而言，此方法比1-SZ方法可提供更多有用的结果，这对于识别对循环和循环至关重要的过程非常重要。生物地球化学的命运。

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  • 来源
    《Water resources research》 |2010年第4期|p.W00D027.1-W00D027.13|共13页
  • 作者

    Martin A. Briggs; Michael N. Gooseff; Christopher D. Arp; Michelle A. Baker;

  • 作者单位

    Hydrologic Science and Engineering Program, Colorado School of Mines, Golden, CO 80401, USA;

    Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA 16802, USA;

    Alaska Science Center, U.S. Geological Survey, Anchorage, AK 99508, USA;

    Department of Biology, Utah State University, Logan, UT 84322, USA;

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