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首页> 外文期刊>Journal of the American Water Resources Association >Hydrodynamic Modeling Improves Green River Reconnection with Floodplain Wetlands for Endangered Fish Species Recovery
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Hydrodynamic Modeling Improves Green River Reconnection with Floodplain Wetlands for Endangered Fish Species Recovery

机译：流体动力学模型改善了洪泛平原湿地与绿河的连接，以恢复濒危鱼类

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We performed two-dimensional (2D) hydrodynamic modeling to aid recovery of the endangered razorback sucker (Xyrauchen texanus) by reconnecting the Green River with its historic bottomland floodplain wetlands at Ouray National Wildlife Refuge, Utah. Reconnection allows spring flood flows to overtop the river levee every two to three years, and passively transport razorback sucker larvae to the wetlands to grow in critical habitat. This study includes (1) river hydrologic analysis, (2) simulation of a levee breach/weir, overtopping of river flood flows, and 2D flow through the wetlands using Hydrologic Engineering Center River Analysis System 2D, and (3) modeling flow and restoration scenarios. Indicators of hydrologic alteration were used to evaluate river flow metrics, in particular flood magnitudes, frequency, and duration. Results showed a target spring flow of 16,000 cfs (453 m(3)/s) and a levee breach elevation of 4,663 ft (1,421 m) amsl would result in a median flow 6,000 acre-feet (7.4 million m(3)) over five days into the wetlands, which is adequate for razorback sucker larvae transport and rearing. Modeling of flow/restoration scenarios showed using gated water control structures and passive low-water crossings between wetland units can provide adequate control of flow movement into and storage in multiple units. Levee breaching can be a relatively simple, cost-effective method to reconnect rivers and historic floodplains, and hydrodynamic modeling is an important tool for analyzing and designing wetland reconnection.
机译：我们通过在犹他州的乌雷国家野生动物保护区将绿河与其历史悠久的底层洪泛区湿地重新连接，进行了二维（2D）流体动力学建模，以帮助恢复濒临灭绝的剃须刀吸盘（Xyrauchen texanus）。重新连接可使春季洪水每两到三年流过河堤，并被动将剃须刀吸盘幼虫运送到湿地以在关键栖息地生长。这项研究包括（1）河流水文分析，（2）使用水文工程中心河流分析系统2D模拟堤防突破口/堰，河流洪水超调以及流经湿地的2D流量，以及（3）对流量和恢复进行建模场景。水文变化指标用于评估河流流量指标，特别是洪水的大小，频率和持续时间。结果显示，目标春季流量为16,000 cfs（453 m（3）/ s），堤防突破高度为4,663英尺（1,421 m）amsl，将导致平均流量> 6,000英呎-英尺（740万m（3））在进入湿地的五天之内，这足以用于剃须back吸盘幼虫的运输和饲养。使用闸门水控制结构和湿地单元之间的被动低水交叉口显示的流量/恢复情景模型可以提供对流入和存储在多个单元中的流量的适当控制。堤防冲破是重新连接河流和历史洪泛区的相对简单，经济高效的方法，而水动力模型是分析和设计湿地重新连接的重要工具。

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