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STUDY ON RIVER FACILITIES HARMONIOUS WITH ENVIRONMENT

河道设施与环境协调的研究

基本信息

批准号：
03452213
负责人：
MICHIUE Masanori
金额：
$ 0.32万
依托单位：
TOTTORI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03452213/
关键词：
RIVER ENVIRONMENT SPUR DIKE 2-D BED EVOLUTION MODEL 3-D FLOW MODEL NUMERICAL SIMULATION POOL AND SHOAL MEANDERING CHANNEL ENVIRONMENTAL PROTECTION 河川構造物河床変動数値シミュレーション数値シミュレ-ション

项目摘要

The development of rivers free from flood damage has resulted in serious ruin of natural river environment. In order to rehabilitate the river environment, we should construct the facilities with both functions on the flood control and the environmental protection. In this paper we have discussed the functions of spur dikes. The spur dike is effective in the protection of bank and the local scour formed around the spur dike will be suitable to the habitat of fishes. This paper is composed of three parts. In first part, the numerical method for 2-dimensional bed evolution is developed and the validity is verified by the simulation of bed evolution in the meandering channel. Then, the method was applied to the field data. The place of the pool and the formation of the meandering streams at the low water were predicted. In second part, using the method the function on the protection of the bank and the profile of the local scour ( pool ) around the spur dike are evaluated. The profile of local scour is not simulated without considering the non-equilibrium sediment transport. In last part the conditions on the pool suitable to the habitat of fishes are discussed from the observation in the Sendai river. The deeper pool composed of the bed material with wide-ranging grain sizes is available for the habitat of fishes.

无洪涝灾害河流的开发造成了河流自然环境的严重破坏。为了恢复河流环境，我们应该建设具有防洪和环境保护双重功能的设施。本文讨论了丁坝的作用。直堤对堤岸的保护效果显著，在直堤周围形成的局部冲刷有利于鱼类的栖息。本文由三部分组成。第一部分建立了二维河床演化的数值方法，并通过对曲流河道河床演化的模拟验证了该方法的有效性。然后，将该方法应用于现场数据。预测了池的位置和低潮处曲流的形成。第二部分，利用该方法对堤岸的保护作用和围堤局部冲（池）的剖面进行了评价。如果不考虑非平衡输沙，就不能模拟局部冲刷剖面。最后，通过对仙台河的观察，探讨了适合鱼类栖息的水池条件。由不同粒度的河床物质组成的较深的水池可为鱼类提供栖息地。