Analysis of wetland change in the Songhua River Basin from 1995 to 2008

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Yuan, L.H.^1,2 ; Jiang, W.G.^1,2 ; Luo, Z.L.^3 ; He, X.H.^4 ; Liu, Y.H.^1,5

State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China^1

Key Laboratory of Environmental Change and Natural Disaster, Beijing Normal University, Beijing 100875, China^2

Chinese Academy of Environmental Sciences, Beijing 100012, China^3

School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, China^4

College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China^5

关键词: Artificial wetland;    Gross domestic products;    Land use/land cover;    Landsat Thematic Mapper;    Patch connectivities;    Socio-economic change;    Songhua river basins;    Wetland landscapes;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012125/pdf
DOI  :  10.1088/1755-1315/17/1/012125

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Wetlands in the Songhua River Basin in both 1995 and 2008 were mapped from land use/land cover maps generated from Landsat Thematic Mapper imagery. These maps were then divided into two categories, i.e. artificial wetland and natural wetland. From 1995 to 2008, the total area of wetland in the Songhua River Basin increased from 93 072.3 km2to 99 179.6 km2a net increase of 6107.3 km2. The area of natural wetland decreased by 4043.7 km2while the area of artificial wetland increased by 10 166.2 km2. Swamp wetland and paddy field wetland became the dominant wetlands and the swamp wetland in the east of the Heilong River system and the north of the Wusuli River system disappeared, being transformed into paddy field wetland. The diversity of wetland landscape is worsening and the distribution of wetland landscape is becoming more unbalanced; the fragmentation of natural wetland has intensified whereas the patch connectivity of artificial wetland has increased. Changes in natural wetlands were primarily caused by climate and socio-economic changes, while changes in artificial wetland were mainly caused by the growth of population and gross domestic product.