Countermeasures,measures and methods against flood hazards.It is a branch of hydraulic science,the main research object includes the natural law of flood, river channel,the condition of flood area and its evolution.The basic work of flood control (flood wall) can be divided into construction,management, flood control and scientific research.

Flood control means taking measures to prevent rivers from flooding during flood periods.The main content of flood control includes: long-term.The middle.Short-term weather forecast, flood situation forecast,embankment,reservoir, sluice,flood storage and detention area and other flood control engineering operation and application,emergency rescue and relief after the occurrence of dangerous situations,emergency measures under extraordinary circumstances.