Finally this paper adopts a novel triangle gridding partition method in plotting isopiestic line 最后在给水管网的基础上绘制等压线，并提出了一种新的三角网格划分方法及等压线的绘制方法。
2.
The article includes three parts , which discuss networks " optimal design , networks " drawing process , and plot methods of isopiestic line respectively 文章分三部分分别论述了管网的优化计算、管网图形的绘制和等压线图的绘制方法。
3.
The optimization system of water supply networks is very complicated . it deals with lots of factors from the process of networks " modeling , node demand calculation , initial flow distribution , and the optimal design to the drawing of pipe networks and isopiestic line . the total effect will be better if amelioration is imposed on each part of these processes 给水管网优化系统是一个比较复杂的系统，从管网的建模、节点流量的计算、初始流量的分配、优化计算到管网图形和等水压线的绘制，涉及的因素很多，任何一部分的改进与完善都有利于整体优化效果的提高。
