| In the rapid urbanization process in China in recent decades,with the increasing urbanization rate and the large number of rural populations accumulating in cities,some urban problems have emerged in China,among which urban pipe network facilities are not comprehensive and old.And the problems of late operation and maintenance are not particularly prominent.In this thesis,based on the deployment and operation status evaluation of sponge city pipe network facilities,an evaluation system of sponge city pipe network facilities based on ArcGIS was researched and developed.The main work done in this thesis includes:(1)The overall structure of the sponge city pipe network facility evaluation system was designed for the actual situation of the internal heel in the sponge city rainfall process.The system is mainly composed of data sensing and processing layer,service supporting layer and application system layer.It completes the functions of collecting,processing and storing the basic data of pipeline network facilities and real-time rainfall data,and finally the sponge system in the application system layer.Management and visual analysis of pipe network facility assessment results,operation and maintenance scheduling,and statistical analysis.(2)In view of the reasonable deployment of sponge city pipe network facilities,this thesis combines the basic data of pipe network facilities(such as pipe diameter,elevation,etc.)and actual rainfall data(including liquid level,flow rate,etc.)for a certain period of time,combined with sponge city The prediction area model and the actual deployment abstract model of the facility use the parallelized node coverage algorithm to calculate the defect distribution,the intrinsic level and the coverage of the pipe network facility nodes in the corresponding area,and evaluate the rationality of the deployment of the pipe network facilities in this area.Firstly,based on the knowledge of graphics,the urban internal zone model and the actual facility deployment abstract model are established.Secondly,according to the node coverage algorithm.the pipe network facility node and the intrinsic polygon region are respectively classified into internal points,and the experimental analysis is carried out.Finally,in order to reduce the node Covering the running efficiency of the algorithm and achieving the real-time effect,the parallel design and implementation of the method are realized..(3)Analyze the state of the pipe network facility node corresponding to an intrinsic point under the different intrinsic level of the sponge city and the state of the associated node.Study methods for evaluating the operational status of regional network facilities.Based on the design flow rate during pipe network layout and the actual flow rate when generating internal defects,this thesis uses the sponge urban pipe network facility model and the node recursive algorithm based on breadth-first search to study the upstream or downstream nodes of the pipe network facilities that cause the defects to occur at this point.The proportion of faults and the corresponding fault level.Firstly,based on the theory of graph theory,the sponge city pipeline network facility model is established.Secondly,the node recursive algorithm based on breadth-first search is used to analyze the fault proportion of the associated nodes.Finally,the fault grade is divided according to the corresponding fault proportion,and then the pipeline network facilities are evaluated.Run the loading and help the operation and maintenance department.(4)Through the above methods,this thesis designs and develops an evaluation system for sponge city pipe network facilities based on ArcGIS.The system provides evaluation results,operation and maintenance task scheduling and other related services to the system administrator and operation and maintenance administrator in different ways.The computing service is provided by the Spark cluster server.The visualization method is mainly based on ArcGIS Map server. |
