渭北高原植被水源涵养功能及价值测评  

A Study on Function and Value of Vegetation Water Conservation on Weibei Plateau

作　　者：焦彩霞[1] 孙根年[1] 任志远[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062

出　　处：《山地学报》2002年第5期583-588,共6页Mountain Research

基　　金：陕西师范大学校级重点科学基金;陕西省自然科学基金 (2 0 0 0D0 2 )资助项目

摘　　要：根据陕西植被图 ,在MapInfo 4 .0上建立渭北高原植被类型数据库 ,从林冠层、枯枝落叶层、土壤层三个层次分析了渭北高原植被水源涵养的物质量 ,并利用影子工程法、成本估算法等方法对其生态功能进行了货币化评定。结果表明林冠层的截留量为 2 36 378.35万t,枯枝落叶层的截留量为 976 1.0 0万t,土壤层的截留量为 2 5 5 6 82 .4 9万t,三个层次总截留量为 5 0 182 1.84万t,水源涵养总价值量为 336 2 2 0 .6 3万元。According to the vegetation map of shaanxi ,this article ,first of all ,used MapInfo 4.0 to set up a data base for vegetation types on Weibei plateau, secondly, analyzed the substance quantity of vegetation water conservation from the forest cap floor, the litter fall floor and the soil floor, finally, used the reflection engineering method and the cost estimated method to appraise the value of the eco function. The result was that the withholding quantity of the forest cap floor, the litter fall floor and the soil floor was 236 378.35 ten thousand tons, 9 761.00 ten thousand tons and 255682.49 ten thousand tons, the whole withholding quantity of the three floors was 501 821.84 ten thousand tons, and all the value of water conservation was 336 220.63 ten thousand yuan. This study was useful for the reasonable use for water resources and the building of the ecological environment.

关 键 词：植被 渭北高原 水源涵养 价值量 GIS 地理信息系统 水量平衡法 容量折算法 

分 类 号：S157[农业科学—土壤学] Q948[农业科学—农业基础科学]