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首页> 外文学位 >Two-Dimensional Flow Modeling of the Big Sioux River at the Highway 13 Bridge near Flandreau, South Dakota.
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Two-Dimensional Flow Modeling of the Big Sioux River at the Highway 13 Bridge near Flandreau, South Dakota.

机译：大苏河在南达科他州弗兰德罗附近的13号公路大桥的二维流模型。

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摘要

This study focused on using a two-dimensional (2-D) flow model to predict the velocity distribution and water depth in the sharp bend of a compound channel. The 2-D model was calibrated using flow measurements obtained over a range of discharges. Computed results from the model were used to predict pier scour depths using the SRICOS-EFA method (Briaud et al., 1999). The site examined is the Highway 13 Bridge over the Big Sioux River at Flandreau, South Dakota.;Before a 2-D hydraulic model of the Big Sioux River near Flandreau, SD was created, four general channels were created for the purpose of developing the proper methods of creating a 2-D model and compare the results of a 1-D model, HEC-RAS, and 2-D model, FESWMS, as the complexity of the channel's geometry was increased.;A topographical survey of the study site was conducted by the USGS that included elevation points along predetermined transects, pier locations, and abutment locations. As the 2-D model of the Big Sioux River near Flandreau, SD was developed, a procedure was written so the results could be reproduced. Once the 2-D model of the Flandreau site was developed, a sensitivity analysis was performed for each input parameter in FESMWS, the 2-D model chosen for this study. The Flandreau site has complex channel and floodplain geometries that produce unique hydraulic conditions at the bridge crossing. The hydraulic and geomorphic factors that affect the main channel and floodplain flows and the flow interactions between the two portions were examined. A 1-D model of the Flandreau site was created in conjunction with the 2-D model and the results were compared.;Overall, this research project provided insight into the capabilities of a 2-D model. The results of the 2-D model were used to correctly predict the measured scour depths at the Highway 13 Bridge crossing. This project also outlined the procedure for creating a 2-D model, examined the sensitivity of the model outputs to the input parameters, and developed a general understanding of 2-D flow effects at a river crossing in the bend of a compound channel.
机译：这项研究的重点是使用二维（2-D）流动模型来预测复合通道急弯处的速度分布和水深。使用在一系列放电范围内获得的流量测量值对二维模型进行校准。使用SRICOS-EFA方法（Briaud等，1999）将模型的计算结果用于预测码头冲刷深度。考察的地点是南达科他州弗兰德劳的大苏河上的13号高速公路桥梁;在创建弗兰德劳附近的大苏河二维水力模型之前，创建了SD的四个通用通道以开发随着通道几何形状的复杂性增加，创建2D模型并比较1D模型HEC-RAS和2D模型FESWMS的正确方法。研究场地的地形调查由USGS进行，包括沿预定样线，桥墩位置和桥台位置的高程点。随着SD弗兰德劳附近大苏河的二维模型的开发，编写了一个程序，以便可以再现结果。一旦开发了Flandreau站点的二维模型，就对FESMWS中的每个输入参数（本研究选择的二维模型）进行敏感性分析。法兰德（Flandreau）场址具有复杂的河道和洪泛区几何形状，在桥梁过境处产生独特的水力条件。研究了影响主要河道和洪泛区流量以及两个部分之间的流量相互作用的水力和地貌因素。结合2-D模型创建了Flandreau站点的1-D模型，并对结果进行了比较。总体而言，该研究项目为2-D模型的功能提供了见识。二维模型的结果用于正确预测13号公路桥梁过境处的冲刷深度。该项目还概述了创建二维模型的过程，检查了模型输出对输入参数的敏感性，并对复合通道弯道中的河流过境处的二维流动效应有了一般的了解。

著录项

  • 作者

    Larsen, Ryan Jon.;

  • 作者单位

    South Dakota State University.;

  • 授予单位 South Dakota State University.;
  • 学科 Engineering Civil.
  • 学位 M.S.
  • 年度 2010
  • 页码 223 p.
  • 总页数 223
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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