基于土地退化的甘肃省生态脆弱性评价研究  

Ecological Vulnerability Assessment based on Land Degradation Data in Gansu Province

作　　者：张龙生[1,2] 王建宏[1,2] 尚立照[1,2] 

机构地区：[1]甘肃省生态环境监测监督管理局,甘肃兰州730020 [2]甘肃省林业调查规划院,甘肃兰州730020

出　　处：《中国沙漠》2010年第4期783-787,共5页Journal of Desert Research

摘　　要：生态脆弱性评价是区域生态综合评价的重要内容和生态规划的重要依据。采用甘肃省最主要和普遍的土地退化指标:土地沙漠化、土壤侵蚀(水蚀)、土壤盐渍化3项指标,以县为单元,对全省进行生态脆弱性综合评价。省内土地沙漠化和土壤盐渍化主要发生在河西地区,土壤侵蚀(水蚀)主要发生在中东部和南部地区。生态脆弱性综合评价结果为:全省发生土地退化的81个县(市、区),强度脆弱2个,高度脆弱4个,中度脆弱26个,轻度脆弱30个,微度脆弱19个。生态脆弱性呈现由南到北增加的趋势。Ecological vulnerability assessment is an important aspect of comprehensive ecological assessment and an important basis of ecological planning. The ecological vulnerability of each counties of Gansu province was assessed in this paper based on the monitoring data of three types of the most important and widespread land degradation, namely aeolian desertification, soil erosion （water erosion）, soil salinization. Aeolian desertification and soil salinization occurred mainly in Gansu corridor, and soil erosion （water erosion） occurred mainly in the eastern and southern regions of Gansu province. The assessment results showed that there were 2 counties with very severe ecological vulnerability, 4 counties with severe ecological vulnerability, 26 counties with moderate ecological vulnerability, 30 counties with slight ecological vulnerability and 19 counties with very slight ecological vulnerability in 81 counties existing land degradation. There wasn＇t land degradation and corresponding ecological vulnerability in Hezuo region. Ecological vulnerability distr bution showed a reinforcing trend from south to north in Gansu province.

关 键 词：土地退化 生态脆弱性 评价 甘肃省 

分 类 号：X144[环境科学与工程—环境科学]