System Of Fuzzy Synthetic Evaluation On Landfill Site Selection For Municipal Waste

With development of economy, improvement of people's living standard and rapid increment of population in cities, the problem of municipal waste becomes more and more important to the issue of cities' sustainable development for every country. There're mainly three ways such as incineration, landfill and compost to deal with municipal waste at present. As an effective mean to treat municipal waste, landfill is the primary method all over the world.Around landfill site, soil, groundwater and air will be set in a potentially dangerous status. An unreasonable landfill site selection will be catastrophic to environment in future. Therefore, site selection is of more importance to the whole construction of landfill.The factors of landfill site selection, which involve natural, economical and social aspects, should be considered more carefully than any other engineering site selection. So landfill site selection is more difficult and complex to be dealt with. A careless omission is easy to lead to a serious result. With the present point of view, landfill site selection is technical documents' identification and site exploration in situ. It is difficult to consider the factors entirely due to the complex factors and the impaction of people themselves. Sometimes it may even lead to a waste of more human and material resources.Based on above .situation, this study applies the fuzzy synthetic evaluation method to landfill site selection for municipal waste. This is an advanced study issue, and its aim is to offer man a new thought and a new method for landfill site selection. At the same time, it is wandered to be able to set some referable values for landfill site selection. Talking about landfill site selection, some factors that need to be considered contain uncertainty (fuzzy). The appearance of fuzzy mathematics has offered a set of effective method to describe this kind of thing whose boundary is not settled. Through establishing subordinate function and making these fuzzy factors quantified, we can solve problems in fuzzy environment and make suitable decisions. Simultaneously combined with applying the method of Analytic Hierarchy Process (AHP), the weightiness of each appraised index is set, which can make the evaluation result more scientific and reasonable.Through applying this fuzzy synthetic evaluation to Laogang landfill inShanghai, we drew two conclusions: Firstly, current Laogang landfill site selection is reasonable; Secondly, the result of this evaluation system is credible, which has certain valuable feasibility and applicability. On this foundation, a computer program based on conversation between people and machine is developed, which can make work of landfill site selection for municipal waste more convenient and operational.