| Water supply network is an important infrastructure for the survival and development of the city,bear the city for the delivery of life and production of water the total task.Reasonable distribution of pipe network traffic,to maintain the safe and efficient operation of the pipe network need to conduct a scientific diagnosis and analysis of water supply network.On the other hand,the rapid expansion of the city and the intensification of the urbanization process have caused the change of the space requirement of the land in the area,resulting in the phenomenon of over-load operation in the water supply network.Therefore,scientific and reasonable spatial statistics of urban water demand is an important way to ensure the safe and reliable water supply and the evaluation of urban land water supply conditions.In accordance with the principle of supply-demand balance between urban water supply network supply and urban commercial,residential,industrial,pouring green,road four types of water demand,this paper designs a method to realize the diagnosis of urban water supply network based on water demand network convergence algorithm,and provides decision support for water supply network reconstruction and planning.According to the characteristics of the three types of land and the relationship between the characteristics of the model to characterize the needs of different urban water use,the establishment of a vertical water demand for the statistical method.Based on"balance of supply-demand" as pipe network diagnostic criteria,based on the layout of pipeline and the establishment of water supply,a tree digraph of water supply network is established.Based on the relationship between pipeline and urban plots,according to the basic water demand from the leaf node to the root node step by step convergence of the idea of the establishment of urban water supply pipe network of radial water space statistical methods,based on the total demand of water demand,the theoretical calculation of flow rate and the actual diameter comparison to achieve the rationality of the management of urban water supply pipe network.In this paper,the relevant method modules of ArcGIS software are used to design the relevant process flow,and the water supply network of Wuhan city center is taken as the research object.Wuhan City water supply pipe network diagnostic results show:(1)Water demand balance of the total number of 127 lines,a total length of 418km;unbalanced pipeline 10,a total length of 27.8km(2)The vertical demand load can not meet the pipe section 6,the total length of 14.9km,the main distribution Qiaokou District,Wuchang District and Hongshan District and other regions,mainly due to the distribution of pipeline in the region less pipeline pipeline end of the larger load(3)The total length is 12.9km,which is mainly distributed in the south of the high-tech new road in Hongshan District,north of Xiongchu Avenue in Wuchang District and Jiefang Avenue in Jianghan District.The main reason is that in the network The diameter of the pipe in the connected topology is too small to meet the radial flow demand of the transmission.The results show that the actual situation and spatial distribution of urban water supply network in Wuhan are the problems.It is foreseeable that the rapid development of large urban water supply network construction will encounter the same problem,so this paper on the supply and demand balance based on the water supply pipe network diagnostic methods are likely to be widely used,and municipal departments and policy makers to provide guidance. |
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