Gis-based Optimization Of The Msw Disposal Facilities Location

As an integral part of the municipal solid waste (MSW) integrated management system, the location of waste treatment facility occupies an important position. Because of lacking systematic theory guiding, the location of MSW disposal facilities is the weak link in integrated management system, and optimized selection of waste treatment facility plays a vital role in the management system optimization.As the key parts of MSW collection and disposal system, collection, transit, transportation, and disposal were deeply investigated and analysised in the paper. And on the basis of the study, spatial analysis theory of geographic information systems was used to realiaze the economical optimization and the environmental impact minimization. The comprehensive MSW production prediction model, as well as the integrated geographic information evaluation system for the location of waste disposal field and the transfer stations, was proposed. The methods were also applied in the actual cases of small town sanitary landfill construction in Chongqing and MSW transfer stations building in Beibei District. The conclusions are as follows:â‘ The main factors of urban MSW production are the the urban population, income, consumer spending levels, living habits and etc. The main prediction methods are time series analysis, multiple regression analysis, the gray system model analysis and average yield projection method. The MSW production of the main city of Chongqing was predicted separatedly by the gray system model analysis and multiple regression analysis, and furtherly predicted by an integrated prediction model which was based on the integrated analysis. The integrated prediction result showed that Chongqing urban MSW would reach 5.938 million tons in 2015, and 7.272 million in 2020.â‘¡A integrated geographic information evaluation system for the optimal landfill location was built in the paper, on the basis of studying Analytic Hierarchy Process (AHP) and spatial analysis of geographic information systems, and analysis of the distribution model and the selection principle of garbage disposal fields. The specific steps are: selecting the evaluation objectives, framing a hierarchical model of the system; establishing an evaluation factor database; determining the weights of quantitative and qualitative indicators; determining classification value of evaluation factors and multiple comprehensive assessment of site quality; and identifing each influencing factor's weight and its fitness level. Combined with Arc GIS software, this comprehensive evaluation of geographic information systems was applied to the practice of sanitary landfill construction of small towns in Chongqing. Through a series of research and analysis, including data collection, data processing and analysis, and data calculation, the final optimization result of small town landfill distribution was drawn.â‘¢By researching the principles and influence factors of MSW transfer station site selection, the MSW transfer station distribution planning system was built, including analysis and forecast of waste production index, identification of waste transport model, and identification of transfer station size and reasonable services radius. On the basis of researching current situation of MSW transportation and treatment in Chongqing city, the distribution of transfer stations in Beibei District was optimized by using the system and the Arc GIS software. And the specific optimization steps included the foundation of the region information, the determination of the the evaluation critera of location, and the process analysis of data. And the optimized result was got finally.