The Optimal Design Of Water Supply Networks Rehabilitation & Development On Its Drawing Software

With the development of the city modernization, water demand increase greatly year after year. There are lots of problems that influence water distribution systems, along with deteriorating of water quality because of increasing for using time, which facing the problem of rehabilitation. Rehabilitation is an important problem faced by water supply governor. Because of the huge investment and management cost, optimal rehabilitation can save much money and actualize good economic and social situation.This paper uses the Gray Theory forecast the long-term water demand of city first, beginning with the practical situation of rehabilitation, constructed the Gray Metabolizing water demand forecast model. The model can increase precision of gray model with a few data. This paper also introduces mathematics model and calculation method of rehabilitation later, which establishes the foundation of networks system rehabilitation.In the process of optimal design of water supply networks, this paper puts forward a new method which processes network optimization by a basic related matrix only, including node demand calculation, initial flow distribution, and finally optimization. In data processing, a method based on automated created identification matrix and coefficient matrix through data transformation which can reduce the time of initial data greatly.In the networks' system drawing process, based on the data from optimal design, we can design the drawing interface through VisualLISP driving Dialog Control Language which has a merit of good interface. In drawing isopiestic line, this paper puts forward a new method drawing isopiestic line by Script file. This paper make full use of the computation ability of program and the drawing advantages of VisualLISP tool in AutoCAD, it reaches the goal of optimal design of water supply networks and drawing unification.