Evaluation of Rio Grande Management Alternatives Using a Surface‐Water/Ground‐Water Model 1
Evaluation of Rio Grande Management Alternatives Using a Surface‐Water/Ground‐Water Model 1
复制标题
使用地表水/地下水模型评估格兰德河管理方案 1
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
N. Shafike
中科院分区：
文献类型：
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作者：
L. Wilcox;R. Bowman;N. Shafike
翻译后摘要：以前的调查观察到显着的渗漏损失从格兰德河索科罗和圣安东尼奥，新墨西哥州之间的浅层含水层。 沿着格兰德河10公里的河段以及相关的排水沟和运河使用高分辨率望远镜建模，以评估旨在提高河流运输效率的几种管理方案。观测数据包括地下水和地表水高程、沿着格兰德河及相关运河和排水沟的渗透率以及钻孔地质。通过调整水力传导率和比贮量，直到输出与观测数据相匹配，实现模型校准。敏感性分析表明，该系统是响应水文地质特性的变化，特别是当这种改变增加层之间的垂直连接。校准模型预测，去除低流量输送通道，一个主要的渠道排水的山谷，不仅会减少67%的河流渗漏，但也减少了75%的总流量通过河段。通过该河段的流量减少将导致内涝增加，地下水海拔平均增加1.21米。 模拟系统减少河岸蒸散率或搬迁河道也预测减少河流渗漏，但程度要小得多。
Abstract: Previous investigations observed significant seepage losses from the Rio Grande to the shallow aquifer between Socorro and San Antonio, New Mexico. High‐resolution telescopic modeling was used along a 10‐km reach of the Rio Grande and associated drains and canals to evaluate several management alternatives aimed at improving river conveyance efficiency. Observed data consisted of ground‐water and surface‐water elevations, seepage rates along the Rio Grande and associated canals and drains, and borehole geology. Model calibration was achieved by adjusting hydraulic conductivity and specific storage until the output matched observed data. Sensitivity analyses indicated that the system was responsive to changes in hydrogeologic properties, especially when such alterations increased vertical connectivity between layers. The calibrated model predicted that removal of the low flow conveyance channel, a major channel draining the valley, would not only decrease river seepage by 67%, but also decrease total flow through the reach by 75%. The decreased flow through the reach would result in increased water logging and an average increase in ground‐water elevations of 1.21 meter. Simulations of the system with reduced riparian evapotranspiration rates or a relocated river channel also predicted decreased river seepage, but to a much lesser degree.