1) Flood occurred abiding its law. Especially the big flood is related to blast of the sunspot. Geologist predicted according to statistics of the blast of sunspot and flood happened in areas of Yangtze River and Yellow River during a period from 1840-1994, that in around of 1997 would be big flood.

2) Damaged ecology is the cause and nature disaster accelerated is the effect.

3) Compared to the history, the flood in Yangtze River this year has three characteristics: middle level of the water flow capacity, higher level of the floodwater and biggest disaster. The main reason is the erosion of water and soil...