Analysis of Bed Change Characteristics by Installing Ecological Facilities in Rivers

Crisis and Emergency Management: Theory and Praxis Pub Date : 2023-04-30 DOI:10.14251/crisisonomy.2023.19.4.55

S. W. Lee, S. Maeng, Da Ye Kim, S. Seo, Hyung-Keun Park

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Abstract

This study intends to conduct a one-dimensional and two-dimensional hydraulic characteristic analysis of the ecological facilities of Jocheon. For this purpose, two field surveys were conducted on hydraulic characteristic data such as longitudinal and cross-sectional data of rivers and roughness coefficient, and boundary conditions were set by establishing flow data for one-dimensional numerical simulation and calculating the starting point of water level. The water level was derived from the results of one-dimensional hydraulic characteristic analysis according to the ｢Jocheon Basic River Plan｣ as input data for the RMA-2 model. Lastly, the riverbed changes in the entire section of the target river and the facility installation section were confirmed and analyzed through SED-2D simulation using the calculated flow velocity. As a result, it was analyzed that the width of the river has a great influence on the flow rate. In additon to this, the concentration of suspended sediment flowing into the upstream has the most influence on the change of the river bed.

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河流生态设施设置对河床变化特征的影响

本研究拟对朝川市生态设施进行一维和二维水力特性分析。为此，对河流纵断面数据、粗糙度系数等水力特征数据进行了两次实地调查，并通过建立一维数值模拟流量数据和计算水位起点设置边界条件。水位是根据“朝川基本河规划”作为RMA-2模型输入数据的一维水力特性分析结果得出的。最后，利用计算得到的流速，通过SED-2D模拟，对目标河整段和设施安装段的河床变化进行确认和分析。分析了河道宽度对流量的影响。除此之外，流入上游的悬沙浓度对河床变化的影响最大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Crisis and Emergency Management: Theory and Praxis

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