Distributed Water Balance with River Dynamic-Diffusive Flow Routing Model
Distributed Water Balance with River Dynamic-Diffusive Flow Routing Model
复制标题
河流动态扩散流路模型的分布式水平衡
DOI：
10.1016/s1001-6058(08)60185-7
复制
发表时间：
2009
影响因子：
2.5
通讯作者：
Tamai Nobuyuki
中科院分区：
文献类型：
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作者：
Ahmed A. A. Hassan;Tanaka Norio;Tamai Nobuyuki
本文重点研究了分布式水量平衡模型中河流动力学和河流扩散耦合模拟技术的应用。在上游流域，无论是陆地和河流扩散流路由扩散波近似的自由表面流方程。在河流下游，河流动力流由一维动力波动方程（带侧流的全动力圣维南方程）求解。开发的模型应用于日本关东地区荒川河流域的一部分。河流断面的地理数据可以用11点断面近似法精确表示。研究了网格尺寸和横向水流对河流动力模型模拟结果的影响。网格尺寸应大于河流横断面的平均宽度。小型水系的侧向水流对河流动力模型的模拟结果有较大影响。模拟结果与实测流量和水深吻合良好。可以正确估计具有一个/两个复杂洪泛区的复式河道网络中任何位置的河流流量和水深。
This article focuses on the application of coupling both river dynamic and river diffusive modeling techniques that can be used with distributed water balance model. In an upstream watershed, both overland and river diffusive flows are routed by diffusive wave approximation of the free surface flow equations. In river downstream reaches, the river dynamic flow is routed by one-dimensional dynamic wave equations (full dynamic St. Venant equations with lateral flow). The developed model is applied in a part of Arakawa River basin, Kanto area, Japan. The geographic data of river cross sections could be accurately represented by an 11-point cross-section approximation. The effects of both the grid size and lateral flow on the simulated results of the river dynamic flow model were studied. The grid size should be greater than the average width of the river cross-sections. The lateral flow from small drainage systems has significant effects on the simulated results using the river dynamic flow model. The simulated results show good and acceptable agreements with the observed flow discharges and water depths. Both the river discharge and water depth at any location of river network of compound channels with one/two complex floodplains could be correctly estimated.