In the paper, the evolution law of the typical wetlands (the wetland near the confluence of Raohe River estuary and main branch estuary of the Ganjiang River, and Ganjiang southern-branch delta wetland) in the Poyang Lake wetland was studied by the classification of the Landsat-TM images during the period from 1991 to 2008. Results showed that the wetlands expanded the main water body of the Poyang Lake obviously. Furthermore the wetland was in a positive succession from 1989 to 2001 before the operation of the Three Gorges Project. With the running of the Three Gorges Project, the effects on the succession of the wetlands were very different depending on the distance from Hukou. The succession of the Raohe River wetland near the Hukou Station was changed, which was obviously affected by the running of the Three Gorges Project. Some of the Carex beach changed into Bulrush beach, and the range of the Carex beach has greatly extended because the time when the wetland was exposed has been moved up. While the Ganjiang middle-branch delta wetland that is far from the Yangtze River had less changed after the operation of the Three Gorges Project and it was in a steady positive succession.
YU Li, HE Long-hua, ZHANG Qi, CHEN Yu-wei, WANG Xiao-long
. Effects of the Three Gorges Project on the typical wetland vegetations of Poyang Lake[J]. GEOGRAPHICAL RESEARCH, 2011
, 30(1)
: 134
-144
.
DOI: 10.11821/yj2011010013
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