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城市环境问题日益突出,对城市生态价值的定量评估有助于理清生态系统各功能间的关系,加强全社会对环保的认识,优化环境决策,促进环境经济评估纳入国民经济体系.对2009—2013年宜兴市生态价值要素的指标体系及其可量化的评估因子进行一一对应,利用市场价值法和影子工程法等定量研究方法,构建宜兴市生态价值评估体系,阐释生态系统改良土壤、涵养水源、调节气候、净化大气等生态服务价值和生态系统的物质产品产出价值.结果表明,宜兴市生态价值具有巨大的生态经济效益,2009—2013年生态资源价值总量分别为344.650 7,369.804 6,397.805 6,421.737 5,441.939 1亿元,充分反映了宜兴市生态系统对全社会做出的巨大生态服务功效.
The urban environmental problems have become increasingly prominent, and the quantitative assessment of urban ecological value helps to clarify the relationship between various functions of the ecosystem, strengthen the understanding of the whole society on environmental protection, optimize environmental decision-making and promote environmental economic assessment into the national economy. According to the index system of ecological value of Yixing City and its quantifiable evaluation factors in 2013, the paper uses the quantitative research methods such as market value method and shadow engineering method to construct the ecological value assessment system in Yixing City, Water resources, climate regulation, air purification and other ecological services value and the output value of ecosystem products.The results show that ecological value of Yixing has huge ecological and economic benefits, the total value of ecological resources in 2009-2013 are respectively 344.650 7,369.804 6,397.805 6,421.737 5,441.939 100 million yuan, which fully reflects the great ecosystem service effect made by the ecological system of Yixing City to the whole society.