基于城市搬迁地的公园绿地建设项目综合效益评价研究——以上海世博公园为例

Research on Comprehensive Benefit Evaluation of Park Green Space Construction Project Based on Urban Relocation:A Case Study of Shanghai Expo Park

基于城市搬迁地开展园林绿化项目建设是解决城市高密区可用绿化空间不足的重要途径。构建基于城市搬迁地的园林绿化项目效益评估指标体系,以上海世博公园为例,在公园建成后第8年(2018年),从环境、社会、经济和景观4个方面对该场地尺度绿化项目产生的多重效益进行系统性综合评价。结果表明:世博公园在应对气候变化、降低土壤污染、增加生物多样性以及园林植物景观的色彩与季相方面的单项效益较为突出;在水文调控、净化空气、缓解热岛效应、休闲游憩和可达性方面的单项效益仍具一定提升空间。世博公园的综合效益指数为70.98,评估结果为良,反映出这一基于城市搬迁地建设的公园绿地具有良好的可持续性,基本达到项目规划设计的预期效果。其中,评价结果从大到小依次为:景观效益(94.62)、环境效益(73.23)、社会效益(60.00)、经济效益(39.60)。研究可为基于城市搬迁地的园林绿化项目建设成效评估提供借鉴,用于针对性地优化其单项效益和综合效益,从而促进此类项目的可持续发展。

The construction of landscaping projects based on urban relocation sites is an important means to solve the shortage of available green space in high-density urban areas. A multi-index evaluation system for the comprehensive benefits of landscaping projects based on urban relocation sites is constructed. In the 8 th year after the construction of World Expo Park in Shanghai, From the aspects the environment, society, economy, and landscape benefits, the multiple benefits produced are systematically and comprehensively evaluated. The results show that the Expo Park has more outstanding individual benefits in coping with climate change, reducing soil pollution, increasing biodiversity and the rich color and seasonal appearance of the plant landscape;There is still room for improvement in individual benefits in hydrological control, air purification, heat island effect mitigation, leisure and recreation, and accessibility. Expo Park’s comprehensive benefit index is 70.98. The evaluation result is at the good level, reflecting that this park’s green space based on urban relocation sites has good sustainability and achievs the expected effects of the project planning and design. Among the four aspects, the landscape benefit evaluation result is the highest at 94.62;the environmental benefit is the second at 73.23;the social use is followed closely with the evaluation result at 60.00;the economic benefit is relatively low, at only 39.60. The research can provide a reference for evaluating the construction effectiveness of landscape projects based on urban relocation sites,so as to improve the individual and comprehensive benefits and promote the sustainable development of such Projects.