Research On Leakage Of Water Supply Network Based On Spatial Econometric Model

In recent years,with the rapid development of China's society and the acceleration of urbanization,water consumption of residents has been increasing,leading to the pressure of the water supply pipe network gradually increasing.In this case,the leakage of urban water supply network is becoming more and more serious,which makes water resources more scarce.Moreover,once the pipe is leaking and needs to be repaired,it will bring great inconvenience to the residents' water use.Under this background,this project establishes spatial econometric models of the water supply system to explore the influence factors of water supply pipe network leakage,accurately predict the leakage of the water supply network and pipeline,and avoid the occurrence of water supply network leakage accident.Firstly,relevant indexes that may affect the leakage of water supply network are selected from three aspects of pipeline properties,environmental factors and operating factors,including pipe age,pipe diameter,pipe length,the number of pipeline,thickness of covering soil,water pressure and pipeline flow velocity.And taking the whole water supply network in a city as an example,the spatial auto-correlation analysis is carried out and the positive spatial correlation of leakage in the water supply area is verified.In this model,each water supply area is a space.Then under the condition of existing spatial correlation,two spatial weight matrix are defined,and the spatial panel models are established respectively based on different spatial weight matrix.Finally,Based on the established model,the influencing factors and degree of water supply pipe network leakage are explored,and the leakage situation in the following four time periods are predicted.Then according to the prediction results,the reliability of the model is verified and the order of regional leakage is completed.Later,in order to further explore the situation of pipeline leakage,the research scope was narrowed down.Then taking water supply area A for example,the spatial econometric model in water supply pipeline is established.In this model,each pipe is a space.Based on the established model,the degree of affecting leakage in the water supply network by various factors are investigated and the reliability of the model was validated by the prediction results.Finally,the leakage of each pipe is basically understood.