陕甘宁老区脆弱生态环境定量评价——以榆林、延安两市为例  

Quantitative Assessment of Fragile Environmentin Shaanxi-Gansu-Ningxia Border Area

作　　者：杨新[1] 延军平[1] 

机构地区：[1]陕西师范大学旅游与环境学院,西安710062

出　　处：《干旱区资源与环境》2002年第4期87-90,共4页Journal of Arid Land Resources and Environment

基　　金：国家社会科学基金"西部大开发中的生态环境建设战略研究--陕甘宁老区实证分析"(0 2 1BJY0 45 );国家自然科学基金"全球变化下秦岭南北环境脆弱程度的比较研究"(4 0 0 710 0 5 )

摘　　要：位于黄土高原中部的陕甘宁老区生态环境极为脆弱 ,近年来由于气候、人类开发资源等自然和人为原因 ,使生态环境的脆弱程度升高。选定年降水量、年均温、蒸发量等 8个指标 ,定量评价各县 1 970 - 2 0 0 0年的脆弱度状况 ,结果表明榆林、延安两市生态环境整体脆弱 ,脆弱度存在空间差异但差异不明显 ,时间段上的波动幅度不大。陕甘宁老区脆弱生态环境具有不稳定性 ,对外界干扰较敏感。Due to the history, nature and human reason, the environment in Shaanxi-Gansu-Ningxia border area is very fragile.The fragile degrees of all county in Yulin and Yan'an based on the record of annual rainfall and amount of evaporation, the cultivated lands/person, net income/peasant and GNP/person were Assessed and the character of the fragile degrees in time and space were Analyzed.The result showed the environment in all county in Yulin and Yan'an was fragile, the fragile degrees fluctuated in time and space. Natural climate change and human activities were the main factors for fragile environment.

关 键 词：脆弱度 陕甘宁地区 生态环境评价 

分 类 号：X171[环境科学与工程—环境科学]