Function Analysis of the Urban Green Space Disaster-prevention System Based on AHP
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Chunyan Zhu, Zhenglin Qiao, Yizhi Jiang, Yuedan Wang
Taking the rebuilt urban disaster-prevention green space system as the study object in Dujiangyan city, Sichuan province after the "5.12" Wenchuan Earthquake in 2008, this paper aims to establish the evaluation system that suits small-sized cities located on the seismic belts such as Dujiangyan. The study employs Analytic Hierarchy Process (AHP) and selects forty-nine closely relevant factors from the four main aspects: urban environment, the spatial structure, the layout of the urban disaster-prevention green space and the emergency shelters and facilities in Dujiangyan. The forty-nine factors are categorized into index and criteria level. Through a questionnaire survey, the study draws the objective assessment of the disaster-prevention function of the urban green space system in Dujiangyan from both qualitative and quantitative perspectives. Based on the analysis of the assessment results combined with the current hardware and software emergency facilities stats quo, this paper proposes strategies for the improvement and perfection of the disaster-prevention green space system in Dujiangyan.
Green space system, Dujiangyan, function evaluation, analytic hierarchy process.