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Relationships Between Water Table and Model Simulated ET

机译：地下水位与模型模拟ET之间的关系

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摘要

This research was conducted to develop relationships among evapotranspiration (ET), percolation (PERC), groundwater discharge to the stream (GWQ), and water table fluctuations through a modeling approach. The Soil and Water Assessment Tool (SWAT) hydrologic and crop models were applied in the Big Sunflower River watershed (BSRW; 7660 km~2) within the Yazoo River Basin of the Lower Mississippi River alluvial plain. Results of this study showed good to very good model performances with the coefficient of determination (R~2) and Nash-Sutcliffe efficiency (NSE) index from 0.4 to 0.9, respectively, during both hydrologic and crop model calibration and validation. An empirical relationship between ET, PERC, GWQ, and water table fluctuations was able to predict 64% of the water table variation of the alluvial plain in this study. Thematic maps were developed to identify areas with overuse of groundwater, which can help watershed managers to develop water resource programs.
机译：进行这项研究的目的是通过一种建模方法来开发蒸散量（ET），渗滤（PERC），地下水向河流的排放量（GWQ）和地下水位波动之间的关系。在密西西比河下游冲积平原亚速河流域的大向日葵河流域（BSRW； 7660 km〜2）中应用了土壤和水评估工具（SWAT）的水文和作物模型。这项研究的结果表明，在水文模型和作物模型的校准和验证过程中，测定系数（R〜2）和纳什-苏特克利夫效率（NSE）指数分别为0.4至0.9，具有良好的模型性能。 ET，PERC，GWQ和地下水位波动之间的经验关系能够预测本研究冲积平原的地下水位变化的64％。绘制了专题地图，以查明地下水过度使用的地区，这可以帮助流域管理人员制定水资源计划。

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  • 来源
    《Ground water》 |2014年第2期|303-310|共8页
  • 作者

    Priyantha Jayakody; Prem B. Parajuli; Gretchen F. Sassenrath; Ying Ouyang;

  • 作者单位

    Department of Agricultural and Biological Engineering, Mississippi State University, Starkville,MS 39762;

    Department of Agricultural and Biological Engineering,Mississippi State University, Starkville, MS 39762;

    USDA-ARS Crop Production Systems Research Unit,Stoneville, MS 38776;

    USDA-FS, Center for Bottomland Hardwoods Research,Starkville, MS 39762;

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