Rubber dam is a flexible hydraulic building made of high-strength rubber cloth, which forms a waterproof structure after being filled with water or aeration. Its main uses include: 1. Water storage regulation: used for irrigation, water supply or landscape water formation; 2. Flood control flow: release dams during flood season, and lift water level during dry season; 3. Ecological protection: maintain the ecological flow of rivers; 4. Power generation and shipping: assist small hydropower stations or improve water depth in the waterway. It has the advantages of low cost, fast construction and flexible operation, and is widely used in small and medium-sized river management and urban water conservancy projects.