城市植被净化大气价值计量与评价——以西安市为例

The calculation and assessment to the values of air purification by vegetation in Xi’an City

摘要: 对西安市植被净化大气物质量及价值测定结果表明，植被净化大气年总价值为34．26356亿元，占1999年西安市国内生产总值的6％，其中年固定CO₂和释放0₂的价值为27．18309亿元，年吸收SO₂、HF和NO_x3种污染物的价值为1．82896亿元，年滞尘价值为1．825l1亿元，年灭菌价值为3．42640亿元。并通过Maplnfo的叠加分析得出各行政区统计结果。

Abstract: The matter quantities and the value of air purification by vegetation in Xi'an City are estimated．The results show that the total value of air parification by vegetation is 3426．356 million yuan per year．which is 6％ of GDP of Xi’an in 1999；the value of fixing CO₂ and releasing O₂ is 2718．309 million yuan per year，the value of absorbing the three pollutants，SO₂、HF、NO_x，is 182．896 million yuan per year，the value of dust retention is 182．511 million yuan per year，the value of sterilization is 342．640 million yuan per year．Using the function of overlaying analysis on Maplnfo 6．0，the statistical results of each cantonal are gained．