基于遥感影像的2019—2020年盐城市生态保护红线区人类活动动态分析

以盐城市生态保护红线区为研究对象,选用哨兵-2号卫星遥感影像进行目视解译及变化斑块提取,分析其区域内2019—2020年人类活动的变化趋势。结果显示,动态变化情况分为正变化和逆变化,其中逆变化占变化总面积的绝大部分,主要呈现为水田的减少;正变化主要呈现为农村居民点的拆除。总体来说,人类活动变化面积非常少,无工业用地的增加。该技术获取数据速度快、效率高、成本低,可作为国家生态保护红线区等动态监管和生态评估的重要支撑手段。

Dynamic Analysis of Human Activities in Yancheng Ecological Red Line Protection Area from 2019 to 2020 Based on Remote Sensing Images

Taking the ecological protection red line area of Yancheng City as the research object, this paper selected the Sentinel 2 satellite remote sensing image for visual interpretation and change patch extraction, and analyzed the change trend of human activities in the area from 2019 to 2020. The results showed that the dynamic change was divided into positive change and negative change, and the negative change accounted for the majority of the total area of change, mainly represented by the decrease of paddy field. The main positive change is the demolition of rural settlements. Overall, the area changed by human activities was very small and there was no increase in industrial land. The technology has the advantages of fast data acquisition speed, high efficiency and low cost, and can be used as an important support means for dynamic supervision and ecological assessment in national ecological protection red line areas.