摘要
利用1990年、2000年和2007年的TM影像数据,研究了3个时期河南省不同类型湿地的分布和变化。结果表明,1990年、2000年和2007年河南省湿地的面积分别为98.69×104hm2、91.11×104hm2和105×104hm2;河南省湿地可以分为沼泽、河渠、湖塘、水田和滩地5种类型;水田面积在各类型湿地中最大,2007年达到64.26×104hm2;十几年间,沼泽面积明显萎缩,平均每年减少5.52%;湖塘的面积却明显增加,平均每年增加2.57%。人为因素是自然湿地萎缩和人工湿地增加的主要原因。
The data of wetlands in Henan Province in 1990, 2000 and 2007 were obtained from TM and ETM images, using RS image processing and GIS information extraction and analysis functions. The results showed that the whole areas of wetlands in Henan Province were 98.683×104 ha in 1990, 91.111×104 ha in 2000 and 105×104 ha in 2007. For various types of wetlands, the areas of mires and beaches reduced and those of pools and paddy fields increased in recent years. The mires shrank sharply and the annual reduction rate of area was 5.52%. The annual increment rate of pool area was 2.57%. The area of paddy fields was the biggest among all kinds of wetlands; it was 64.264×104 ha in 2007. The human activities were main reasons for the natural wetlands degraded and man-made wetlands changed.
出处
《湿地科学》
CSCD
2011年第1期94-96,共3页
Wetland Science
基金
河南省基金项目(072300410290)资助
关键词
湿地
变化
河南省
wetland
change
Henan Province
