As the development of industrialization and urbanization, the loss caused by flood becomes more and more seriously to the nation and masses. Being the most important the part of hydraulic engineering works, storage and detention basin could reduce the flood peak, but its loss is enormous. When encountering with flood in the storage and detention basin, how to organize the people and their property to evacuate efficiently and quickly to the safe area is the initial work of the rescue. Consequently, as the no...