【作者】 王阳；

【导师】 田一梅；

【作者基本信息】 天津大学 ， 环境工程， 2005， 硕士

【摘要】 为了研究给水管网中的水质变化,提高城市给水系统的水质管理水平,本课题通过对某供水管网进行针对性的水质实验,系统的评估了该管网的水质现状,建立不同的管网余氯衰减模型进行对比分析,并在此基础上结合地理信息系统编制了管网水质信息系统。首先,确定北方某高校供水管网为研究对象,对其进行了连续一个多月的水质监测,通过分析管网中主要水质指标及其相关影响因素,掌握了该管网的基本水质情况,尤其对余氯的衰减变化规律有了比较深入的了解,并据此提出了改善水质现状的建议。其次,根据该大学校园内部用水情况,结合基本管网资料,进行水力平差计算,得到各管网监测点之间的水力停留时间,基于此对该大学管网进行二期水质检测实验。依据此次实验数据,首次建立了管网监测点余氯的多元统计回归模型和人工神经网络模型,并创新性的将支持向量机算法引入管网水质模型,通过与机理模型进行比较,取得了令人满意的效果,开拓了在小样本条件下建立管网水质模型的新思路。最后,将管网水质模型与地理信息系统相结合,编制出管网水质信息系统,突破了传统意义上水质管理的局限性,能够在可视化的条件下对管网水质进行空间管理分析,为供水企业进一步提高管网水质管理水平做出了有益的探索。更多还原

【Abstract】 For the purpose of researching water quality variation in water supply networksand improving the management of water quality, experiments and researches are madeto evaluate water quality of the selected network. Different residual chlorine decaymodels are formed, compared and analyzed. The Water quality information systembased on Geographic Information System is worked out.Firstly, the distribution network of a northern university is chosen as the studyobject. After more-than-one-month continual monitor, water quality status of thisnetwork is investigated through analyzing key parameters and their influencing factors.Understanding of residual chlorine decay rules is pushed forward. Suggestions ofimproving water quality status are provided.Secondly, hydraulic resident time among checkpoints is achieved by hydraulicanalysis, which is calculated with water consumption of the university and basic dataof the network. According to the calculated resident time, a second-roundmeasurement of the network is put into effect. Based on the former research, multiplelinear regression model and artificial neural network model of residual chlorine forcheckpoint are established for the first time. And support vector machine algorithm isinnovative introduced in water quality model of the distribution network. Comparedwith the first-order kinetics equation, SVM model works reasonably well, whichmake it possible to form water quality model in distribution system by small sample.Finally, water quality information system in distribution network is establishedthrough combining water quality model with Geographic Information System. Bycontrolling and analyzing water quality in distribution system visually, this systemmakes up the shortage of traditional water quality management. The work is availableexploration to improving water quality management of distribution system.更多还原