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Brief Introduction
of Poyang Lake
Poyang Lake is located in the northern part of Jiangxi Province,
North Latitude 28¡ã24¡ä- 29¡ã46¡ä, East Longitude 115¡ã47¡ä- 116¡ã45¡ä.
To the north is Hukou County and to the south is Jinxian County;
to the west is Yongxiu County and to the east is Poyang County.
It is 173 km long from north to south. The furthest width is 74km
from west to east. The area of main water body is 3,283 km2 when
the water level at Hukou is 21.71m(Wusong Base Level). The narrowest
point at the water channel joining the Yangtze River is 2.8km. It
is wider in the south and narrow in the north. It holds water from
the water system of five rivers -- Gan River, Fu River, Xing River,
Rao River and Xiu River, and emptied into Changjian River in the
north. It is an integral centripetal water system, connecting with
more than 2,000 thousand rivers and streams.
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The Formation
and Evolution of Poyang Lake
Poyang Lake is formed under the long-term interaction of the neotectonic
movement, the holocene transgression, and other meteorological,
hydrological, geological and geographic factors. Crustal movement
is the dominant factor for the formation of lake basin. The holocene
transgression is the prerequisite for it. It is the direct reason
for the formation and expansion of Poyang Lake that, the main waterway
of Changjiang shifted to the south under effect of the crustal movement;
the watercourse filled up and Meijia Alluvion developed, which resulted
in the constraint of cross section of flow into Cahngjian at Hukou
and the high water level of Changjiang counterworked the outflow
at Hukou. The water body at in the south of Penglize Pond expanded
to the south of Songmenshan Mountain in 400 A.D. Hereon its name
is changed to Poyang Lake.
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Cranes
in Poyang Lake
The total number of white crane wintering in Poyang Lake was above
4,000 at the utmost, accounting for more than 95% of total of white
crane in the world. Such a huge white crane population is a good resource
for developing wetland eco-tourism at Poyang Lake. It also indicates
the natural wetland ecosystem is benign and enjoyable. Crane is significant
to the global culture. It is admired as lucky birds. There are 15
species of cranes in actual existence in the world, which are widely
living in wetlands, lakeshore, riversides, swamps and tidal flat areas
of North America, Africa, Europe and Asia. Except for that several
cranes like wattle crane are resident birds, which do not migrate
in long distance, the rest are migrant birds breeding in the north,
wintering in the south. They are migrating regularly between the south
and the north by a fixed route.
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2003
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