郑州市给水管网微观水力模型校验方法研究

Study on Calibration Method of Microscopic Hydraulic Model of Zhengzhou Water Distribution Network

介绍了郑州市给水管网微观水力模型构建和校验的主要过程,阐述了校验过程中遇到的难点及解决方法。供水企业水力模型构建过程中存在的主要问题是GIS导入过程中出现的数据缺失、异常或冗余,需进行仔细筛选、查找和判断。模型校验是建模过程中非常重要的一个环节,通过采用分区与分类型校验相结合、粗调与微调相结合的方法,使模型达到较高的精度,管网的平均节点压力误差为16kPa,水厂出厂瞬时流量相对误差<10%,满足工况分析的要求。

The main processes of establishment and calibration of microscopic hydraulic model of Zhengzhou water distribution network are introduced, and the difficulties and solutions on model calibration are elaborated. The main problems of modelling for a water supply corporation are data incompleteness, error and redundancy, which occur in the course of importing data from GIS files. To solve these problems, it is necessary to select, search and judge the data carefully. Model calibration is an important step for modelling. By combining zoned-calibration with typed-calibration, as well as coarse adjustment with fine adjustment, the model reaches a high accuracy. The average error of node pressure is about 16 kPa, and the relative error of instantaneous flow of finished water is less than 10%, meeting the requirement for operation analysis.