| 1990~2020年黄河流域典型生态区生态环境质量时空格局及驱动力分析 |
| 摘要点击 1661 全文点击 1215 投稿时间：2022-06-02 修订日期：2022-08-02 |
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| 中文关键词 六盘山自然保护区 熵值法 遥感生态指数(RSEI) 地理探测器 生态环境质量 |
| 英文关键词 Liupanshan nature reserve entropy method remote sensing ecological index(RSEI) geodetector ecological environmental quality |
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| 中文摘要 |
| 科学评估生态环境质量是实现区域生态可持续发展的前提.基于1990~2020年Landsat遥感影像，采用熵值法构建遥感生态指数（E-RSEI），结合Mann-Kendall趋势检验、Sen倾斜度、Hurst指数和稳定性分析，在多时空尺度下分析黄河流域典型生态区的生态环境质量时空变化格局，并利用地理探测器量化了环境和人为等8个因子对E-RSEI时空分布的影响.结果表明：① 31年间E-RSEI均值为67.5%，时间尺度上呈增加趋势，平均增幅为0.066 ·（10 a）-1，空间尺度上呈东低西高、南高北低的分布特征；②研究区生态环境质量未来变化趋势将以持续性改善为主，但仍有9.33%的区域存在退化的潜在风险.③降水是影响该区域E-RSEI空间分布的关键环境因子，人为因子的影响力较低，同单因子相比，因子交互作用对生态环境质量的解释力更强，降水与其他因子的交互作用处于主导地位.研究结果可为黄河流域生态区生态环境质量的可持续发展提供科学参考. |
| 英文摘要 |
| Scientific evaluation of ecological environmental quality is the premise of realizing regional ecological sustainable development. Taking Landsat series satellite images from 1990 to 2020 as the data source, on the basis of the entropy remote sensing ecological index (E-RSEI), combining the Mann-Kendall significance test, Theil-Sen Median analysis, Hurst exponent, and stability analysis, the spatial-temporal variation characteristics of ecological environmental quality in typical ecological areas of the Yellow River Basin were analyzed in the context of multi-spatiotemporal scales. In addition, the effects of eight environmental and human factors on the change in E-RSEI were quantified using a geodetector. The results showed that:① in the past 31 years, the average value of E-RSEI was 67.5%, which showed an increasing trend on the time scale, with an average increase of 0.066·(10 a)-1. On the spatial scale, E-RSEI was higher in the west and the south lower in the east and the north. ② The ecological environmental quality will continue to improve in the future, but 9.33% of the areas have potential risks of degradation. ③ Precipitation was the dominant environmental factor that affected the spatial distribution of E-RSEI in this area, and the influence of human factors was low. Compared with that of single factors, the interaction of factors had a stronger impact on ecological environmental quality, and the interaction between precipitation and other factors played a leading role. The results of this study can provide a scientific reference for the sustainable development of ecological environmental quality in the ecological zone of the Yellow River Basin. |
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