| １９８７－２００４年洞庭湖典型湿地类型动态分析 |
| Dynamic Analysis of Typical Wetland in Dongting Lake during 1987一2004 |
| 投稿时间：2012-03-28 修订日期：2012-05-07 |
| DOI： |
| 中文关键词:湿地 光谱特征 洞庭湖 |
| 英文关键词:wetlands spectral characteristics Dongting Lake |
| 基金项目: 国家重大专项(E0305/1112/02);国家“十二五”863项目“数字化森林资源监测关键技术研究”(2012AA102001) |
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| 中文摘要: |
| 洞庭湖湿地是我国重要的湖泊湿地,先后经历了大范围围湖造田和退田还湖。选取1987年12月、1995年12月和2004年12月3期TM遥感影像,通过决策树分类方法对其进行分类,计算土地利用类型转移矩阵,对洞庭湖典型湿地类型面积动态变化进行分析,以了解1987-2004年退田还湖前后自然湿地与人工湿地相互转化状况,为今后洞庭湖湿地保护提供数据支撑。结果表明,1987-2004年,人工湿地减少,自然湿地增长,增长主要集中在草滩地和芦苇滩地,草滩地增长速率为23.85km2/a,芦苇滩地增长速率为1.97km2/a。1987-1995年,尽管湿地总体上呈现增长,但自然湿地退化严重;1995-2004年,人工湿地呈现下降趋势,在自然湿地中,水域与泥沙滩地总体变化不明显,芦苇滩地与草滩地呈现增长。退田还湖对湿地保护起到了主要作用,但仍存在一些围湖造田现象,退田还湖工程实施没有得到完全落实。 |
| 英文摘要: |
| Dongting Lake wetland occupies an important position in Chinese lakes and wetlands，which has undergone a wide range of reclaiming land from lakes and RETURNING. The present study selected three December TM remote sensing images in 1987，1995，and 2004，and classified them through the decision tree classification method. The type of land use transition matrix was calculated and the area change of typical types of wetlands in Dongting Lake was analyzed rationally in detail. By analyzing the dynamic change of typical wetland in Dongting Lake area between 1987一2004，this study were planned to understand the status of natural wetlands and artificial wetlands transformed into each other before and after the RETURNING，and to provide data support for wetland conservation of Dongting Lake in the future. The results showed that during 1987一2004，the constructed wetlands were reduced，while natural wetlands exhibited growth，mainly in the marsh land and reed beach. The growth rate of the marsh land was 23 .85 km2/a，and the growth rate of the reed beach was 1 .97 km2/a. In the years 1987-1995，natural wetlands degraded heavily，while wetlands generally showed growth. From 2004 to 1995，in the natural wetlands，the overall change of waters and mud sand was not obvious，while the reed beach and marsh showed growth，and constructed wetlands showed a degradation trend. The RETURNING works has played a certain role in wetlands protection，but there is still some phenomenon of reclaiming land from lakes，the implementation of the project has not been completely implemented. |
| 东启亮,林 辉,孙 华,严恩萍.2012.１９８７－２００４年洞庭湖典型湿地类型动态分析[J].水生态学杂志,33(3):1-8. |
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