| 杞麓湖流域生态安全性及在各因子中的变化特征 |
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| 引用本文： | 赵筱青,谭琨,易琦,李思楠,苗培培,普军伟.杞麓湖流域生态安全性及在各因子中的变化特征[J].水土保持研究,2019,26(3):285-292. |
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| 作者姓名： | 赵筱青 谭琨 易琦 李思楠 苗培培 普军伟 |
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| 作者单位： | 云南大学 资源环境与地球科学学院, 昆明 650091 |
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| 摘 要： | 以杞麓湖流域主要生态环境问题为出发点，利用综合指数法、熵值法和GIS技术，选取坡度、海拔、植被覆盖度、土地覆盖类型、距水体距离、距其他建设用地距离、距居民点距离、距道路距离8个生态安全评价指标，对流域生态安全进行了评价，并分析了各单因子对生态安全影响的空间变化特征与形成机理。结果表明:（1）杞麓湖流域平均生态安全指数为2.59，生态安全以较低安全为主，占流域总面积的36.33%，中度安全和不安全次之，分别占流域总面积的23.36%和22.53%，高度安全面积最少，仅占17.77%。较低安全区主要分布在西北部、东南部和西南部，应加强对这些地区的生态保护建设；（2）通过对流域生态安全性及在各因子中的变化特征研究，表明在坡度较小和海拔较低区域以较低安全为主；有林地主要以高度安全为主，建设用地区不安全面积比例最大；距其他建设用地距离、距居民点距离和距道路距离越近生态不安全区面积越大，生态安全性越低；（3）流域生态安全性受多种因素综合影响，各因子间存在相互促进与相互抑制关系，植被覆盖度、土地覆盖类型、距其他建设用地距离、距居民点距离和距离道路远近因子对流域生态安全性有较大影响。
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| 关 键 词： | 生态安全性 影响因子 变化特征 综合指数法 杞麓湖流域 |
Ecological Security of the Qilu Lake Basin and Its Variation Characteristics in Factors |
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| ZHAO Xiaoqing,TAN Kun,YI Qi,LI Sinan,MIAO Peipei,PU Junwei.Ecological Security of the Qilu Lake Basin and Its Variation Characteristics in Factors[J].Research of Soil and Water Conservation,2019,26(3):285-292. |
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| Authors: | ZHAO Xiaoqing TAN Kun YI Qi LI Sinan MIAO Peipei PU Junwei |
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| Institution: | College of Resource Environment and Earth Science, Yunnan University, Kunming 650091, China |
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| Abstract: | In view of the major ecological environmental problems in the Qilu Lake Basin, we selected eight ecological safety assessment indicators, i. e., slope, altitude, vegetation coverage, land cover type, distance to water surface, distance to other construction land, and distance to residential area, to assess the ecological security of this basin using the comprehensive index method, entropy method, and GIS technology. The results indicated that:(1) the average eco-safety index of the Qilu Basin was 2.59 and the ecological safety was mainly based on lower safety, accounting for 36.33% of the total area of the river basin, followed by moderate safety and insecurity, accounting for 23.36% and 22.53% of the total basin area, respectively; the safest area was the smallest, accounting for only 17.77%; the lower safety zones mainly distributed in the northwest, southeast and southwest, and ecological protection construction in these areas should be strengthened; (2) through the research on the ecological security of the basin and its variation characteristics in factors, it was shown that the lower security was dominant in the areas with smaller slopes and lower elevations; forest lands were mainly based on high security, and the construction area had the largest proportion of unsafe areas; the greater the distance between other construction land, residential areas and roads, the greater the area of ecological insecurity, and the lower the ecological security; (3) the ecological security of the river basin was affected by a variety of factors; there were mutual promotion and mutual inhibition between the factors; vegetation coverage, land covers types, distance to other construction land, distance to residential sites, distance to roads and distance factors had the significant impacts on ecological security. |
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| Keywords: | ecological security impact factors variation characteristics comprehensive index method Qilu Lake Basin |
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