基于多源遥感的黄河三角洲湿地动态监测

Dynamic monitoring of wetlands in the Yellow River delta based on multi-source remote sensing

城乡建设的逐步推进与自然生态环境保护之间的矛盾愈发激烈,我国对黄河三角洲湿地区域的发展高度重视,迫切需要对黄河三角洲近年来的动态变化信息进行监测、提取与分析。本文利用2000—2021年8景Landsat光学影像与2015—2021年34景Sentinel-1降轨VV极化SAR影像,对黄河三角洲湿地区域的宏观(土地利用)、微观(地表形变)信息进行提取,并结合社会经济、自然环境数据进行驱动因素分析。结果表明:2000—2021年黄河三角洲湿地区域土地利用格局未发生显著变化,但土地利用程度逐步提高;2015—2021年黄河三角洲湿地区域的地表形变程度空间分布极不均匀,最大沉降速率达-43.643 mm/a,最大抬升速率为0.136 mm/a;人类活动和社会经济是引起该区域地表信息变化的主导驱动因素。

The contradiction between the gradual urban and rural construction and natural ecological environmental protection is becoming more and more intense,and the state and government attach great importance to the development of the Yellow River delta wetland area.Therefore,it is urgent to monitor,extract and analyze the dynamic change information of the Yellow River delta in recent years.In this paper,macroscopic(land use)and microscopic(surface deformation)information of the Yellow River delta wetland region is extracted and analyzed by using 8-view Landsat optical images from 2000 to 2021 and 34-view Sentinel-1 downscaled VV polarized SAR images from 2015 to 2021,combined with socio-economic and natural environment data for driving factor analysis.The results show that the land use pattern of the Yellow River delta wetland region did not change significantly between 2000 and 2021,but the land use degree gradually increased;the spatial distribution of the surface deformation degree of the Yellow River delta wetland region is extremely uneven between 2015 and 2021,with the maximum sedimentation rate reaching-43.643 mm/a and the maximum uplift rate of 0.136 mm/a;human activities and socio human activities and social economy are the dominant drivers of surface information changes in the region.