淮河干流岸边带生态健康遥感评估

结合高分辨率遥感影像在岸边带范围提取、生态系统高精度分类、生态结构特征提取方面的优势,将景观结构指数纳入岸边带生态健康评估指标体系,从生态功能、生态结构和生态胁迫三个方面对淮河干流岸边带生态健康状况进行全面调查评估.评价结果显示,淮河干流岸边带生态健康指数低于0.3,生态健康状况总体处于较差水平,并具有明显的空间走向特征,从上游到中游呈现出生态环境状况逐渐变差、再略有改善的趋势.通过对淮河干流岸边带生态环境问题的分析,认为人类开发强度大、植被覆盖率低、自然岸线保有率低、人为干扰强度大是造成淮河干流岸边带生态健康状况较差的主要原因.

Remote sensing assessment of ecological health of the riparian buffer along Huaihe River

This study introduces landscape structure indices into the ecological assessment system of riparian health, taking advantage of remote sensing capabilities in the derivation of riparian zone, feature extraction of ecological structure, and high-precision classification of ecological system. An overall ecological investigation and assessment of riparian health along Huaihe River was carried out from the aspects of ecological function, ecosystem structure and ecological stress. The results showed that the health of riparian ecology along Huaihe River was generally poor, with an ecological health index less than 0.3. A significant spatial characteristic was shown that the ecological environment gradually became worse from upstream to midstream and then slightly improved. Intensive human development, low vegetation coverage, low natural shoreline rate and high human disturbance were identified as the main cause of the bad ecological condition of the riparian zone along Huaihe River, according to the analysis of ecological and environmental problems.