Indicator System And Decision-making Model Of Eco-city Assessment In Chongqing Based On Group Decision Making And Dempster-ShaferTheory

The rapid development of China’s urbanization process is facing huge challenge.Building ecological city is the only way to achieve sustainable development. Indicatorsystem of eco-city is the set of measurable parameters to describe the eco-cityconstruction content and scope, reflect the ecological urban development direction andemphasis. In order to evaluate and guide the development of eco-city correctly, weshould define a scientific indicator system and determine its weight system. The role ofthe indicator system of eco-city is not only limited to evaluation, the more significantrole should be actively guide to the steady and healthy development of the ecologicalcity. According to the indicator system, decision-making model is set up, so as to makethe optimal decision of ecological city development. Then the urban development willbe most accord with the requirement of the indicator system. So the model research ismeaningful and can meet the demand of eco-city development.This paper firstly compared the multiple indicator system of eco-cities at home andabroad. According to Chongqing’s developingsituation and characteristics, a indicatorsystem of eco-city assessment framework of Chongqing is defined depended on theDelphi method. And then through the questionnaire survey,we obtained20expertsindividual indicator weight allocation.140judgment matriceswas constructed by usingAnalytic Hierarchy Process (AHP) and processing. And then we got20relativeweighting function of first grade assessment indicator and six second grade assessmentindicator. By introducing the idea of consistency in Group Decision Making, wecalculated similarity coefficient between each two weights allocation function. A total of1995similarity coefficients was calculated. And seven20order similar matrices wasconstructed, to calculate credibility of each experts on each grade indicator weightcalculating.Then the weight system of eco-city assessment indicator is determined bydata fusion of20experts. Finally, according to the established evaluation indicatorsystem of eco-city, eco-city development decision-making model was set up based onthe D-S theory. Benefit from the processing ability to uncertain information, D-S theorymake the model more scientific and reasonable when making decision under incompleteinformation.Chongqing eco-city assessment indicator system is divided into three layerconstruction, consist of land resources and space, building, resources and environment, transportation, industry and urban operation management.23second grade indicators,and a total of59indicators is included in the system. By making up the weightingmodel combined with20experts’ opinion, we calculated the weight allocation ofChongqing eco-city assessment indicator system. Indicatorcategories of "building" and"resources andenvironment" accounted for27.7%,26.9%, is the absolute priority insystem. Land resources and space is another key point in the system, reflect the rarity ofland in mountain city(Chongqing). For second grade indicators, building energy saving,site development, industrial green development, green community construction, publictransportation, renewable energy utilization, regional natural environment is endowedwith a relatively large weight. Established in this paper, the DS/AHP decision model canbe well applied in ecological urban development decision making under the incompleteinformation. The decision-making model can express the uncertainty. At the same time,the uncertaintydeclinedobviously after the evidence fusion from different individualdecision. So decision making based on credibility and likelihood tend to moreconsistent.Then the final decision goes to more clearly.