2003-2013年大沽河口湿地高分辨率遥感监测与变迁分析

High-Resolution Remote Sensing Monitoring and Change Analysis of the Dagu River Estuary Wetland

以2003年SPOT 5和2013年资源三号高空间分辨率遥感影像为数据源,开展了大沽河口湿地现状的遥感监测,分析了2003-2013年10 a间大沽河口湿地的变迁情况。研究结果表明:1)2003年研究区域湿地类型面积为8 876.80 hm^2,占研究区域的65.45%,其中自然湿地占22.8%;2013年研究区域湿地面积为6 779.1 9 hm^2,占研究区域的50%,其中自然湿地占19.4%;2)10 a间,大沽河口湿地面积减少了2 097.61hm^2,其中自然湿地面积减少446.72 hm^2,人工湿地整体面积减少1 650.92hm^2;3)10 a间研究区域总体呈湿地类型向非湿地类型转化、自然湿地向人工湿地转化,其中湿地类型向非湿地类型转化的面积为2 569.68 hm^2,自然湿地向人工湿地转化面积为397.54hm^2。

The high-resolution remote sensing images obtained by SPOT 5 in 2003 and ZY-3 in 2013 are used to monitor the status of the Dagu River estuary wetland, and the changes of the wetland from 2003 to 2013 are analyzed. The results show that： 1） The area of the wetland was 8 876.8 hm2 in 2003, making up 65.45% of the study area, of which the area of natural wetland was 22. 8%. In 2013, the area of the wetland was 6 779.19 hm2 , making up 50% of the study area, of which the area of the natural wetland was 19.4%. 2） In the period of 10 years, the area of the Dagu River estuary wetland reduced by 2 097.61 hm2 , of which the reduction area of the natural wetland was 446.72 hm2 , with the artificial wetland area decreasing by 1 650.92 hm2. 3） In the period of 10 years, the study area tended generally to transform from a wetland type to a non-wentland one, from a natural wetland type to an artificial one. The conversion area was 2 569.68 hm2 from wetland to non-wetland and 397.54 hm2 from natural wetland to artificial wetland.