Yangtze River is always the high-frequency area of flood disaster in China. Though the measures of defending flood and reducing disaster damage have been greatly enhanced with the development of science and technology, economic losses that flood had made are much bigger than ever before because of the advance of society and the rapid development of economy. Facing the increasingly serious flood disaster and other natural problem, governments at all levels pay much attention to how to defend disaster and reduce disasters damage, and now began to use technology to promote the development of disa...
