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首页> 外文期刊>Journal of the American Water Resources Association >MODELING EFFECTS OF BRUSH MANAGEMENT ON THE RANGELAND WATER BUDGET: EDWARDS PLATEAU, TEXAS
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MODELING EFFECTS OF BRUSH MANAGEMENT ON THE RANGELAND WATER BUDGET: EDWARDS PLATEAU, TEXAS

机译：灌木丛管理对牧场用水预算的模拟效果：德克萨斯州爱德华兹高原

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摘要

The Soil and Water Assessment Tool (SWAT) was used to evaluate the influence of woody plants on water budgets of semiarid rangelands in karst terrain. The model was configured for the hydrologic evaluation of the North Fork of the Upper Guadalupe River watershed and was calibrated and verified using measured flow data. Nash and Sutcliffe fit efficiencies for daily and monthly verification periods were 0.09 and 0.50, respectively. Streamflow, baseflow, and evapotranspiration (ET) rates were comparable to published field data. Simulated deep recharge was considerably higher than the published values for the Edwards Plateau. The model was then used to simulate conditions with existing brush cover and four different brush removal scenarios. Scenarios were created to represent existing brush and the removal of brush from only locations that were either covered by heavy brush, were on a moderate slope, or were in shallow soils. Resulting data was compared to previous studies of both field experiments and model simulations. Maximum brush removal resulted in a reduction in ET equal to 31.94 mm/yr depth over the entire basin, or 46.62 mm/yr depth over the treated area. Removal of heavy brush cover resulted in the greatest changes in evapotranspiration, surface runoff, base- flow, and deep recharge. Slope was found to have the greatest effect on lateral subsurface flow.
机译：土壤和水评估工具（SWAT）用于评估木本植物对喀斯特地形中半干旱牧场的水预算的影响。该模型配置用于瓜达卢佩河上游流域北叉的水文评估，并使用实测流量数据进行了校准和验证。 Nash和Sutcliffe的每日和每月验证期间的拟合效率分别为0.09和0.50。流量，基础流量和蒸散（ET）速率与已发布的现场数据相当。模拟的深层补给明显高于爱德华兹高原的公布值。然后，该模型用于模拟具有现有电刷盖和四种不同电刷移除场景的情况。创建了场景来表示现有的画笔，并且仅从被重画笔覆盖，处于中等坡度或处于浅土中的位置移除画笔。将所得数据与以前的现场实验和模型仿真研究进行了比较。最大程度地去除刷子可使整个盆地的ET减少31.94毫米/年，或整个处理区域的深度减少46.62毫米/年。去除沉重的刷子覆盖层可以使蒸散量，表面径流，基流和深层补给产生最大的变化。发现坡度对地下地下流动影响最大。

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