For coping the heavy rainfall, we can take many actions. It can be a preventing method. Also, it can be a restoring method.
1. Preventing - Dam
If we can collect heavy rainfall in one place, we are safe from its impact. To do this, we can make many dams to store water.
2. Preventing - Buffer Zone
Buffer zone in wastewater treatment system is a kind of water tank the wastewater can stay. Suddenly huge amount of water flows in to the wastewater treatment system, it hold the wastewater a moment for manipulate the amount of flow so that the system can work smoothly.