Hydraulic Methods of Flood Routing:

The hydraulic methods of flood routing are used to determine the flow of water in a river or channel during a flood event. These methods use equations to calculate the water flow and velocity at different points in the river or channel. The two main equations used in hydraulic flood routing are the equation of continuity and the equation of motion.

Equation of Continuity:

The equation of continuity is a fundamental principle of fluid mechanics that states that the mass of a fluid is conserved. In other words, the amount of water entering a section of a river or channel must be equal to the amount of water leaving that section. This equation is used to calculate the flow rate of water in a river or channel.

Equation of Motion:

The equation of motion is used to calculate the velocity of water in a river or channel. It takes into account the forces acting on the water, such as gravity and friction, and calculates how these forces affect the velocity of the water.

Both Equations are used:

Both the equation of motion and the equation of continuity are used in hydraulic flood routing to determine the flow of water in a river or channel during a flood event. These equations are used in conjunction with other data, such as topographic maps and rainfall data, to create a detailed model of the flood event.

Energy Equation:

The energy equation is also used in hydraulic flood routing to calculate the energy of the water in a river or channel. This equation takes into account the potential energy of the water, as well as the kinetic energy of the water, to determine the total energy of the water at any given point in the river or channel.

Conclusion:

In conclusion, hydraulic flood routing methods use both the equation of motion and the equation of continuity to calculate the flow of water in a river or channel during a flood event. These equations, along with other data, are used to create a detailed model of the flood event, which can be used to predict the behavior of the floodwaters and help mitigate the impacts of the flood.