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首页> 外文期刊>Journal of Hydroinformatics >Flow modeling and analysis of compound channel in river network with complex floodplains and groynes
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Flow modeling and analysis of compound channel in river network with complex floodplains and groynes

机译：复杂洪泛区与堤坝河网复合河道水流模拟与分析

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Presented here are flow simulations of a network of natural rivers flanked by one or two largenand complex floodplains with impermeable groynes and bridge embankments using one- andnquasi-two-dimensional dynamic flow models. The effects of the large floodplain storage capacity,nmomentum transfer interaction and apparent shear stress at the vertical interface between thenmain channel and floodplain on the flow-simulated discharge and water depth values could benwell explained. The two models were tested and validated in the Arakawa River basin, KantonRegion, Japan. The simulated results show that the large floodplain storage capacity greatlynaffected the flow discharge and water depth results and cannot be neglected. The quasitwo-ndimensional river flow model was used in a flow simulation of a compound channel withncomplex floodplains with groynes and gave more acceptable results. In the simulated case, thenaverage reduction in flood discharge using floodplain groynes was about 7–15%. Thus, floodplainngroynes can be effective for flood protection and attenuation.
机译：这里展示的是使用一维和准二维动态流模型对天然河网进行模拟的情况，该自然河网两侧是一个或两个带有防渗防波堤和桥梁堤岸的大型复杂洪泛区。可以很好地解释洪泛区的大储水能力，动量传递相互作用和主河道与洪泛区之间垂直界面处的表观剪切应力对流量模拟流量和水深值的影响。这两个模型在日本关东地区的荒川流域进行了测试和验证。仿真结果表明，洪泛区较大的蓄水能力极大地影响了径流流量和水深结果，不能忽略。准二维河水模型被用于复杂河滩与丁坝复合河道的水流模拟中，并给出了更令人满意的结果。在模拟情况下，使用洪泛区防波堤平均减少洪水排放约7-15％。因此，泛滥平原可以有效地保护和减少洪水。

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