When designing a pumping station to control flooding, you will need to consider several factors for the station to perform optimally. Apart from the pump type, you will also need to determine the power requirements, water velocity, and size of the pump. Such considerations among others can keep the general costs of the project down. Design factors are also important in the long run because they help you reduce the cost of maintenance and replacement resulting from a malfunctioning pumping system. Here are some crucial pumping station design factors that every private pumping station owner should know.
Pump Selection -- Flow requirements and pressure levels should be the guiding factors when designing a flood control pumping station. You should source for an averagely larger pump than the pumping requirement of the station to prevent overloading the system. Also, note that choosing the right pump size can significantly minimise the energy use. Therefore strike a balance between over-sizing and reducing the operation cost of the station. A submersible pump, which is wholly submerged in the flood water, can be ideal because it reduces the cost and time of engineering work. This type of pump also requires less floor space, and it is flood-proof.
Pressure of the Flood Water -- When pressure in the pumping system drops drastically, then the pump is likely to use more energy in pumping the flood water. Pressure loss is influenced by the size of the pipes, which eventually affects the flow rate. Also, the material, length, and roughness of the water pipe will affect the flow rate. Moreover, the properties of the flood water such as turbidity can cause the pressure to drop. As such, you will need to consider all these attributes when designing your pumping station if you wish to reduce the cost of energy.
Velocity -- Water should flow steadily in the system without stagnation because stagnation affects water intake and flow. Therefore, use concrete to fill all stagnation regions. In addition, ensure that water flows through the intake channel at a steady but uniform velocity.
Sludge -- One problem that faces almost all flood-pumping stations is sludge accumulation because of the receding water level during a dry season. The sediments can accumulate in the sump and reduce the amount of water going through the intake channel. Eventually, the whole system may prevent the pump from operating. A good rule of thumb is for you to consider installing a sludge pump that is specifically meant to remove silt in the main pumping system when the water level subsides.