Change of Flood Runoff form for Long Term and Run-off Model Parameters in Reclamation Area

垦区长期洪水径流形态及径流模型参数的变化

基本信息

批准号：
01560249
负责人：
FUKUSHIMA Akira
金额：
$ 1.54万
依托单位：
Shimane University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01560249/
关键词：
reclamation runoff analysis runoff model runoff model parameter hydrograph peak discharge concentration time return period 河道網流域表面流モデル

项目摘要

This study aims to establish the quantitative evaluation method of runoff characteristics in reclamation land at improved slope. Main points of the study results are as follows :1. A lumped runoff model named KiWS Model (Runoff Model combined Kinematic Wave and Storage Tanks) is developed for analyzing both flood and low water run-off successively.2. A delayed function is introduced to input rainfall sequence of runoff analysis for dissolution of the problems on peak discharge and its occurrence time simulated by the lumped KiWS model and LST-II model (Long and short terms runoff model). The function is evaluated from the distribution characteristics of slope length in a basin model and the equation of lag time applied the practical formula for the concentration time. And it is showed by dealing with the date in MASUDA Reclamation basin that the problems are improved.3. Simplified runoff model of overland flow type omitted the calculation of channel flow is examined and the applicability is evaluated in relation of lumping the watershed model. And the estimating formulae for optimum model parameters have been proposed in relation to the contributing slope lengt h in the ordered watershed model.4. It is pointed out that the quantitative discussion on change of runoff characteristics in reclamation land at improved slope is possible by the proposed runoff model and analytical method.5. The return period for the amount of historical localized heavy rainfall at HAMADA in July 15, 1988 is evaluated by a hydrologic frequency analysis.

本研究旨在建立改良边坡围垦地径流特征的定量评价方法。研究结果主要如下： 1．建立了KiWS模型（结合运动波和储水池的径流模型）模型，用于先后分析洪水径流和枯水径流。 2．在径流分析的输入降雨序列中引入延迟函数，以解决集总KiWS模型和LST-II模型（长短期径流模型）模拟的峰流量及其发生时间问题。该函数是根据盆地模型中坡长的分布特征来评估的，滞后时间方程应用了集中时间的实用公式。通过对增田围垦盆地数据的处理表明，问题得到了改善。 3．考察了简化的地表径流型径流模型，省略了河道流量的计算，并结合流域模型的集总关系评价了其适用性。并针对有序流域模型中的贡献坡长h，提出了最佳模型参数的估计公式。 4．指出所提出的径流模型和分析方法可以定量讨论改良坡复垦地径流特征的变化。5．通过水文频率分析评估了 1988 年 7 月 15 日滨田历史局地强降雨量的重现期。