| 陕甘宁老区脆弱生态环境定量评价——以榆林、延安两市为例 |
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| 引用本文： | 杨新,延军平.陕甘宁老区脆弱生态环境定量评价——以榆林、延安两市为例[J].干旱区资源与环境,2002,16(4):87-90. |
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| 作者姓名： | 杨新 延军平 |
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| 作者单位： | 陕西师范大学旅游与环境学院,西安,710062 |
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| 基金项目： | 国家社会科学基金，国家自然科学基金，021BJY045，40071005，， |
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| 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。
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| 关 键 词： | 脆弱生态环境 定量评价 脆弱度 榆林 延安 |
| 文章编号： | 1003-7578(2002)04-087-04 |
| 修稿时间： | 2002年10月11 |
Quantitative Assessment of Fragile Environment in Shaanxi-Gansu-Ningxia Border Area |
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| YANG Xin,YAN Jun-ping.Quantitative Assessment of Fragile Environment in Shaanxi-Gansu-Ningxia Border Area[J].Journal of Arid Land Resources and Environment,2002,16(4):87-90. |
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| Authors: | YANG Xin YAN Jun-ping |
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| Abstract: | 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. |
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| Keywords: | fragile environment quantitative assessment the fragile degrees Yulin Yan'an |
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