Design and Realization of Decision Support System for Rainstorm Disaster Based on WebGIS

The rainstorm disaster is one kind of worldwide natural disasters, simultaneously it is also a worldwide difficult problem.

9 a after 1949,but the frequency of large storm surge disasters increased.

This article analyzes the causes of the storm surges occurred in Zhuhai districtand their characteristics and damages, and points out that storm surge disasters in Zhuhai district have reations with such factors as the route of typhoon, terrain, flood and so on.

We believe that the storm surge disasters in Guangdong coastal areas resulted from combined effects of weather,topography and hydrologya and other factors.

Historical change and future trends of storm surge disaster in China s coastal area;

The Yellow River estuary delta area is a frequent occurrence area of storm surge disaster.

Natural disaster could not only bring on the direct damage to mankind society during its occurrence, but also result in very strong aftereffect to human community On the basis of analysis of heavy rain and flood influence on China national economy and economy of disaster area, this paper reveals the short term and long term effects of heavy rain and flood disasters on social economy in Chin