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首页> 外文会议>American Water Resources Association's Annual Water Resources Conference, Nov 6-9, 2000, Miami, Florida >HYDROLOGIC-HYDRAULIC MODELING FOR CHANNEL IMPROVEMENT IN AN URBAN-WETLAND FRINGE
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HYDROLOGIC-HYDRAULIC MODELING FOR CHANNEL IMPROVEMENT IN AN URBAN-WETLAND FRINGE

机译：城市湿地边缘通道的水力-液压建模。

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摘要

Providing flood control for urbanizing areas in the fringe of pristine wetlands involves dealing with conflicting criteria of minimizing wetland drawdown and optimizing peak flow conveyance. An integrated approach was used to model watershed and channel hydrologic and hydraulic processes dynamically in such a setting in the Big Cypress Basin (BCB) in Southwest Florida. The hydrologic processes including rainfall-runoff and groundwater flows were simulated using Environmental Protection Agency's (EPA's) Storm Water Management Model (SWMM). The regional hydraulic model for BCB is based on representing the dendritic channel system using the U.S. Army Corps of Engineers Unsteady flow through a full network of open channel (UNET) model. Calibration of the regional model was accomplished by graphical comparison of measured and simulated flows and stages. The channel design and improvements were performed using HEC River Analysis System (HEC-RAS) model. The channel improvements include modifying cross sections, slope, and structural crossings. Different improvement scenarios were modeled using HEC-RAS. The modified channel with structural improvements was incorporated into the regional unsteady model to determine the effectiveness of final design based on dynamic flow simulations. The integrated, interactive modeling approach was found to be a valuable tool in achieving the desired levels of flood control without adverse impacts to the wetlands.
机译：为原始湿地边缘地区的城市化地区提供防洪服务涉及处理相互矛盾的标准，即最小化湿地水位下降和优化峰值流量输送。在这种情况下，采用了一种综合方法对流域进行建模，并动态地在佛罗里达西南部的大柏树盆地（BCB）中设置了水文和水力过程。使用环境保护局（EPA）的雨水管理模型（SWMM）对包括降雨径流和地下水流在内的水文过程进行了模拟。 BCB的区域水力模型基于使用美国陆军工程兵团通过全畅通渠道（UNET）模型的非恒定流表示树突通道系统的基础。区域模型的校准是通过对测得的和模拟的流量和阶段进行图形比较来完成的。通道设计和改进使用HEC河水分析系统（HEC-RAS）模型进行。通道的改进包括修改横截面，坡度和结构交叉。使用HEC-RAS对不同的改进方案进行了建模。具有结构改进的修改后的渠道被纳入区域非稳态模型，以基于动态流模拟确定最终设计的有效性。人们发现，集成的交互式建模方法是实现期望的防洪水平而又不对湿地产生不利影响的有价值的工具。

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