Rainfall-Runoff Charasteristics and Runoff Simulations on Drainage Basin Consisting of Impervious Area and Pervious Area

随着最近城市地区的迅速扩展和已建成的城市地区的重新开发，不透水的地区增加了，下水道溢出和暴雨中的地面洪水经常发生。本文以一个由不透水区和透水区组成的城市化研究流域的实测资料为基础，考虑降雨径流的特点，进行了径流系统的模拟和径流模拟区的建立。然后，从实践的角度研究了该方法的应用.选择科比市住宅区的主要下水道区域（6.16公顷）作为研究对象，该区域由不透水区和透水区组成。通过水文观测、流域系统实地调查和暴雨径流量测定，获得了分析降雨径流特征的基础资料.雨水径流数据， ...更多信息 收集并分析了研究流域发生的溢流和洪水，特别是1989年9月14日的溢流和洪水。得出了暴雨径流特征及溢流、淹没过程.根据各坡面流面降雨损失的特点，应用分析方法得到了研究流域降雨损失模型参数。将各种坡面流规划分为不透水面和透水面，不透水面考虑洼地蓄水量，透水面考虑洼地蓄水量和入渗损失，分别计算降雨损失.研究了径流过程及其模型，并进行了径流模拟。然后，从实用的角度研究了该方法的适用性。此外，本文还考虑了等效流域法对径流模拟方法的简化.应用径流模拟模型，研究了漫滩条件下，漫滩面增加与暴雨径流特征的关系。研究结果对洪水风险评价具有一定的参考价值.提出了一种利用LANDSAT-TM数据表征地表覆盖特征的简化方法。该方法大大缩短了识别陆面的时间。少

Accompanying the recent rapid expansion of urban areas and the redevelopment of established urban districts, the impervious areas have increased, and sewer overflow and surface flooding in heavy rains have become frequent occurrences. In this report, on the basis of the observed results in an urbanized research basin consisting of impervious area and pervious area, the characteristics of rainfall runoff are considered, and modeling of runoff system and runoff simulations area performed. Then, the applications of this methodology are investigated on a practical view point.1. The one of main sewer area (6.16ha) in residential basin in Kobe City was selected as an objective research basin consisting of impervious area and pervious area. Hydrologic observations, field investigations on drainage basin system and measurements of stormwater flow rate have been performed, and then basic data for analysing the characteristics of rainfall runoff were obtained.2. Data on the stormwater runoff and … More the overflow and flooding that occurred in the research basin, especially the overflow and flooding in September 14, 1989, were collected and analyzed. As a result, the characteristics of stormwater runoff and processes of overflow and inundation have been derived.3. Model parameters of rainfall loss for the research basin were obtained by applying the method of analyzes taking the characteristics of rainfall loss of respective overland flow planes into account. Various overland flow planed were devided into impervious planes and pervious planes, and respective rainfall loss was calculated by taking depression storage into account in the case of impervious (overland flow) planes, and by taking depression storage and infiltration loss into account in the case of pervious (overland flow) planes.4. The runoff processes and their modeling have been considered, and the runoff simultations were performed. Then, the applicabilities of this method were investigated on a practical view point. Moreover, simplifications of the method of runoff simulation were also considered by applying the method of equivalent drainage basin.5. The relations between the increase of impervious overland flow planes and the characteristics of stormwater runoff with flooding were investigated applying the runoff simulation model. The results show to be useful for the evaluation of flooding risk.6. A simplified method for representing the properties of a ground cover was presented by utilizing LANDSAT-TM data. The time for distinguishing the land surfaces is fairly reduced by using this method. Less