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Representing Pump-Capacity Relations in Groundwater Simulation Models

机译:在地下水模拟模型中表示泵容量关系

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摘要

The yield (or discharge) of constant-speed pumps varies with the total dynamic head (or lift) against which the pump is discharging. The variation in yield over the operating range of the pump may be substantial. In groundwater simulations that are used for management evaluations or other purposes, where predictive accuracy depends on the reliability of future discharge estimates, model reliability may be enhanced by including the effects of head-capacity (or pump-capacity) relations on the discharge from the well. A relatively simple algorithm has been incorporated into the widely used MODFLOW groundwater flow model that allows a model user to specify head-capacity curves. The algorithm causes the model to automatically adjust the pumping rate each time step to account for the effect of drawdown in the cell and changing lift, and will shut the pump off if lift exceeds a critical value. The algorithm is available as part of a new multinode well package (MNW2) for MODFLOW.
机译:恒速泵的产量(或排出量)随泵排出的总动态扬程(或扬程)而变化。产量在泵的工作范围内的变化可能很大。在用于管理评估或其他目的的地下水模拟中,预测精度取决于未来排放估算的可靠性,可通过包括水头容量(或泵容量)关系对水库排水量的影响来增强模型可靠性。好。相对简单的算法已被纳入广泛使用的MODFLOW地下水流模型中,该模型允许模型用户指定水头流量曲线。该算法使模型在每个步骤中自动调整抽气速率,以考虑单元中水位下降和升程变化的影响,如果升程超过临界值,则会关闭泵。该算法可作为MODFLOW的新多节点井包装(MNW2)的一部分使用。

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  • 来源
    《Ground water》 |2010年第1期|106-110|共5页
  • 作者

    L.F. Konikow;

  • 作者单位

    U.S. Geological Survey, 431 National Center, Reston, VA 20192;

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  • 原文格式 PDF
  • 正文语种 eng
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