基于区统计方法的石羊河流域土地生态敏感性评价  

Land Ecological Sensitivity Evaluation of Shiyang River Basin Based on Zonal Statistics

作　　者：魏伟[1] 石培基[1] 周俊菊[1] 雷莉[2] 魏晓旭[1] 颉斌斌[3] 

机构地区：[1]西北师范大学地理与环境科学学院,兰州730070 [2]甘肃省水利厅石羊河流域管理局,甘肃武威733000 [3]兰州城市学院城市经济与旅游文化学院,兰州730070

出　　处：《水土保持研究》2015年第6期240-244,共5页Research of Soil and Water Conservation

基　　金：国家自然科学资助项目(41261104);国家社科基金青年项目(12CTJ001);甘肃省青年科技基金计划项目(1107RJYA077)

摘　　要：以石羊河流域为研究区,以遥感数据为基础数据源,采用ArcGIS区统计方法进行土地生态敏感性评价,通过构建石羊河流域水土流失、土壤盐渍化、土壤沙漠化、生物多样性四个定量评价指标,利用栅格叠置分析方法定量研究了石羊河流域土地敏感性特征,生态敏感性等级及影响因素。研究结果表明,极敏感和高敏感区占到了全流域总面积的74.68%,低度敏感区和不敏感区分别占石羊河流域总面积的10.59%和0.88%。最后,针对石羊河流域土地生态敏感性分区的特点,通过综合研究结果和相关资料提出了环境保护和生态建设的相关对策,为指导石羊河流域生态治理提供科学依据。Shiyang River basin was chose as the study area, on the basis of remote sensing data sources, Arc GIS zonal statistical method was adopted to improve the land ecological sensitivity evaluation through build- ing the water loss, soil erosion, soil salinization, desertification and soil biodiversity as quantitative evalua- tion indexes. The land sensitivity characteristic and influence factors of Shiyang River basin were analyzed u- sing raster overlay analysis. The results show that the extremely and highly sensitive area of the basin ac- counts for 74.68% of total area; the low sensitivity and insensitivity area accounts for 10.59% and 0.88% of total area, respectively. Finally, in view of the characteristics of land ecological sensitivity division of Shiy- ang River basin, some policies are proposed according to the research results and other materials in order to provide some scientific evidences for ecological management of Shiyang River basin in the future.

关 键 词：土地生态敏感性 区统计 石羊河流域 

分 类 号：Q149[生物学—生态学]