The authors examined the deterioration of the water environment. They went back to the process of human development to check how human design behavior step by step destroys the water balance on earth. Behavior such as deforest, the digging of ground for basement space in the buildings, hard pavement in the cities, the sewer system, the development in the wetland area, and the claimed lands in the waterfront area all disturbed the water system. It is found that human beings large scale of disturbance of nature are actually have to be blamed for all the flood disasters happened in recent years around the world. Although New technology and big construction projects such as Thames barrier, the Mose project in Venice were created to prevent flood, the impacts are still unclear. It is concluded that concept for design needs to be altered and human economic growth needs to be limited if we want to mitigate the threat of flood hazard.