Poyang lake is an ancient faulted basin, about 135 million years ago to big basin, sinkholes dating to six or seven thousand years ago seeper become lakes. For historical Yangtze river diverted and human activity, a lot of sediment deposition lake, lead to the lake is shrinking. Poyang lake collected gan, caresses, manasseh, faith, repair the water, the five main leaked into the Yangtze river again. Water changes, with a larger extent, lifting poyang lake with natural adjust water, flood storage function. 173 kilometers long from south to poyang lake, things the widest place of 74 kilometers, average wide 16.9% kilometers long coastline, lake 1200 km, lake body area surveyed 3,283 homes square kilometres (hukou 21.71 meters), average water depth, most 8.4 meters deep. The volume meter 25.1 about 276 billion cubic meters, is the largest freshwater lakes. It here. ganjiang river, najaf, caresses RaoHe, trim, xinjiang river five the river. The storage, the fourth-longest river into our country the first drive into the Yangtze river, the Yangtze river water each year more than yellow, approval, the sum of sea water, three is a seasonal, stimulation of the lakes type. Poyang lake basin of 16.22 million km2 water basin of jiangxi province, accounts for about 97 percent of the area of the Yangtze river basin, accounts for the annual runoff water 9% : for 1525 billion cubic meters, accounts for about annual runoff 16.3% of Yangtze river valley.
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