三江源地区土壤保持功能空间分析及其价值评估_刘敏超三江源地区土壤保持功能空间分析及其价值评估_刘敏超.pdfVIP

中国环境科学 2005,25(5)：627~631 China Environmental Science 三江源地区土壤保持功能空间分析及其价值评估 ? 刘敏超 1,2,3,李迪强 1 ,温琰茂 2,栾晓峰 1 (1.中国林业科学研究院森林生态环境与保护研究所,北京 100091； 2.中山大学环境科学与工程学院,广东 广州 510275；3.广东海洋大学,广东 湛江 524088) 摘要：在地理信息系统的支持下,利用已有的资料,将三江源地区划分为 1km′1km 的栅格,并以栅格为单元对其生态系统土壤保持功能进行 分析和计算.运用通用土壤流失方程研究了该地区生态系统土壤侵蚀量和土壤保持量及其空间分布, 并利用市场价值法、机会成本法和影 子工程法评估了土壤保持功能的价值.研究表明,三江源地区生态系统土壤保持总量为 1.04′109t/a,其价值总计为 1.25′109 元/a.其中保持土 壤养分的经济价值为 1.10′109 元/a,减少废弃土地的经济价值为 1.64′107 元/a,减少泥沙淤积的经济价值为 1.34′108 元/a. 关键词：三江源地区；土壤侵蚀；土壤保持；空间分析；通用土壤流失方程 中图分类号：X171.1 文献标识码：A 文章编号：1000?6923(2005)05?0627?05 The spatial analysis of soil retention function in Sanjiangyuan region and its value evaluation. LIU Min-chao1,2,3, LI Di-qiang1?, WEN Yan-mao2, LUAN Xiao-feng1 (1.Institute of Forest Ecology Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China；2.School of Environmental Science and Engineering, Zhongshan University, Guangzhou 5l0275, China；3.Guangdong Ocean University, Zhanjiang 524088, China). China Environmental Science, 2005,25(5)：627~631 Abstract：Sanjiangyuan region was divided into 1km′1km grid utilizing obtained data under the support of geographical information system and using the grid as unit to analyze and calculate the soil retention function of its ecosystem. The amounts of soil erosion and retention and their spatial distribution of the region were studied utilizing universal soil loss equation; and the techniques of market value, opportunity cost and shadow engineering were utilized to evaluate the value of soil retention function. The total amount of soil retention in the ecosystem of Sanjiangyuan region was 1.04′109t/d; its total