The Technique And Application Study On The Water System Planning For Coastal Plain City

Water is the soul of the city. The river plays an important role in urban development. With the expansion of development of human society, the demands for urban water systems are increasing. How to plan urban water system without destroying the natural function of the rivers is very important.In this paper, the methods at home and abroad to build urban water system are summarized. Proposed technical methods of urban ecological water planning, which is water space planning method, river hydrological control method, and aquatic planning method. Taking Beihai development area in Binzhou city as example, this paper arrives at the following conclusions.(1) Based on the systematic review of the relevant theories of river ecosystem at home and abroad, the technology system of urban water system planning is put forward, which is composed of spatial optimization, process control and biological selection. The layout of the city water system can be divided into eight categories:central water supply and landscape water system; southern landscape water system;northern salt-mixed water system; drainage system; salt-discharge water system; lakes in farmland; lakes in nature reserve and channels for aquaculture. The hydraulic parameters of the water system are planned through calculation and debugging.(2) Based on the results of urban water system planning, through the calculation and Mike11 simulation as well as the experiment, the capability of water system regulation and control was analyzed. The results show that in Beihaixincheng area,Mashanzi town and the industrial area, the planned water system can hold the biggest daily rain flow in every 5 years. The liquidity of landscape and supply water system can be realized in the normal precipitation year. The salt pressing scheduling methods are proposed in the normal precipitation year and in the scanty precipitation year.(3) According to the characteristics of soil and water environment in Beihai development area, the plant scheme of urban water system was put forward based on the characteristics of plant physiological ecology and the concept of landscape aesthetics.