Retaining walls
In some places, retaining walls levees, lakes, dams, reservoirs or retention ponds have been constructed to hold extra water during times of flooding.
problems caused by floodsTown planning
It is important that builders acquire permission before buildings are erected. This will ensure that that waterways are not blocked. Also drainage systems must be covered and kept free from objects that chock them. This way, water can quickly run through if it rains and minimize any chance of town flooding. Drainage systems should also be covered to prevent litter from getting into them.