Estimation and Control of Quantity and Quality of Demand and Discharge Water in Urban Water Use System

考察了城市生活用水的水质和水量。从用水器具的推广和发展角度对家庭用水进行了分析。对城市和生活用水的水量和水质进行了研究。在水量和水质需求平衡的基础上，考察了中水回用的可能性。雨水也是废水的来源之一。降雨开始时的径流水被污染，因为它冲走了道路和屋顶表面的沉淀物。对雨水水质进行了研究。考虑使用雨水储存设施，以减少受污染的雨水径流。探讨了雨水蓄能系统防洪排污的运行方法，研究了小区域污水处理系统规划的方法。有两种类型的系统：一种是排水系统，另一种是现场处理系统。这些系统的成本从人口和面积的角度进行了调查。这些多用途大坝是为了控制洪水和吃水而修建的。流域内的坝群是一个复杂的系统，其运行十分重要，难度也很大。研究了解决大坝运行问题的方法。

The Water quality and quantity whish is used in urban activities was examined. The water used at home was analyzed in terms of expansion and development of water use appliance. The quantity and quality of water which required for domestic and urban use were studied. On the basis of the balance of water quality and quantity between demand and discharge, water reuse potetial was examined.Rain water is also one of the sources of waste water. The runoff water at the beginning of rainfall is contaminated because it flush out the settled waste on the surface of road and roof. The water quality of rain water was studied. The use of the storage facility of storm water in order to reduce contaminated rain water runoff was considered. The operation methodology of storm water storage system for the control of flood and contaminated rain water discharge was discussed.The methodology of waste water treatment system planning in a small area was studied. There are two types of system ; one is sewerage system and the other is on-site treatment system. The cost of those systems was investigated in terms of population and area.The multi purpose dams were constructed for the control of flood and draft. The group of dams in a watershed is a complicated system and its operation is very important and difficult. Method to solve dam operation problem was studied.