Regulating water flow: Hydraulic dams can control the flow rate and water level of water bodies by adjusting the overflow volume and liquid level, thereby achieving the rational use and allocation of water resources. For example, hydraulic dams can store water when the water level rises and release water when needed to maintain the water level of rivers or reservoirs. In this way, hydraulic dams can provide reliable water supply, flood control and irrigation;

2. Flood control: Hydraulic dams can regulate the peak flow and flow rate, effectively slowing down the impact of floods and reducing the risk of floods. Through reasonable water level control and water release strategies, hydraulic dams can store part of the flood during the flood, and then gradually control the water release to reduce the flood pressure in the downstream areas; 3. Hydropower generation: Hydraulic dams are usually combined with hydropower stations to generate electricity using the kinetic energy of water flow. Water passes through the diversion pipes of the hydraulic dam, driving the turbine to rotate, thereby generating mechanical energy, which is then converted into electrical energy to supply electricity for life and industry. 4. Water supply and irrigation: Hydraulic dams can store water resources and control the flow and time of water supply to provide stable water supply and irrigation for communities and farmland. Hydraulic dams can transport stored water to areas in need by building water diversion pipes and channels; 5. Water transportation: As an important isolation body of the river, hydraulic dams can increase the reliability of ship passage by controlling water levels and water flows.6. Sand discharge: When the water level of the reservoir drops, the sand discharge hole at the bottom of the gate can be used to transport the silt accumulated at the bottom of the reservoir to the shore; 7. Anti-seepage: If a natural disaster causes cracks or collapse in the dam, it can prevent rainwater from flowing back into the dam.