Question

Why do we need
an
effective drainage system?​

Answer 1

This is the most important use of a good drainage system; it allows the free flow of water and in most cases prevents accumulation that can lead to flooding. Drainage systems also prevent the accumulation of stagnant water, which can encourage mosquitoes to breed.

Answer 2

effective drainage system is required because that is about 0.01% water is pure and many of the water is of glaciers which forms river and rivers are also known as the life of the country due to river only about 95% of the people can survive on planet Earth as they meets our requirement of water....