【摘要】 通过对1976—2009年天津市的Landsat影像进行遥感(remote sensing,RS)解译得到天津市34年间湿地信息,利用地理信息系统(geographic information system,GIS)技术对其进行叠加分析得到天津市湿地变化信息.天津市总湿地面积从1970年代到2009年经过了一个明显的先增长后减少的过程,面积变化达到1 568.54 km2,且天津市湿地变化主要受人工湿地的影响.天津市天然湿地面积在1976—1984年间增加了41.59 km2;但之后到1990年代末这一时期内一直处于减少的态势,此时天然湿地所占比例也由49.14%减少到18.85%;21世纪后,天然湿地面积开始回升.更多还原

【Abstract】 Tianjin wetland information during 34 years was obtained by remote sensing(RS)interpretation based on Landsat image from 1976 to 2009,Tianjin wetland change information was obtained using geographic information system(GIS) technology to overlay analysis. Tianjin wetland area from 1970s to 2009 has experienced an obvious decrease after growth, which was reduced by 1 568.54 km2,and the changes of Tianjin wetland were mainly influenced by constructed wetland. Although the area of natural wetlands in Tianjin from 1984 to 1976 increased by 41.59 km2,it has been reduced from 1985 to the late 1990s,meanwhile its proportion reduced from 49.14% to 18.85%;the natural wetland area began to pick up until the 21st century.更多还原