哈尔滨松北区城市湿地土壤抗侵蚀效益价值估算

城市湿地是城市生态系统的重要组成部分,在土壤抗侵蚀方面起重要作用.以哈尔滨松北区城市湿地为研究对象,在哈尔滨松北区湿地的西区、中区及东区沿线共布设采样点3个.哈尔滨松北区城市湿地土壤抗侵蚀效益价值通过湿地减少土地废弃、河道淤积和土壤中肥力流失三方面的价值来估算.结果表明:哈尔滨市松北区城市湿地保护土壤、减少土壤侵蚀的总效益价值为1.900×107元/a;湿地土壤在抗侵蚀效益中的贡献率占总效益的1/5,其效益价值为3.800×106元/a. 

The Benefit Value Estimate of Anti-Erosion of the Urban Wetland Soil of Songbei District of Harbin

The urban wetland is the important part of urban eco-system and plays important roles in soil anti-erosion.The urban wetland of Songbei District of Harbin,which is in the north shore of the Songhua River,was researched and three samples in the west,middle and east part were set up.The value of reduction soil degradation,sediment deposition and nutrient loss of soil was calculated for anti-erosion of urban wetland soil of Songbei District of Harbin.The results indicated that the total value of the urban wetland protection soil is 1.900×10~7 yuan/a and that soil anti-erosion benefit value is one fifth of total value or 3.800×10~6 yuan/a.