Question

Why is open drainage system not preferred while planning a town or a city? Explain with an example. [3 MARKS]

Answer 1

Reason: 2 Marks
Example: 1 Mark

Open drain system serves as a breeding place for flies, mosquitoes, and organisms which cause diseases. Hence open drainage is never opted for when planning for a town.
Example:
Chandigarh being a planned city doesn't have any open drainage system. Instead, the city has a well planned underground network of pipes for disposal of sewerage. The system has been designed according to the natural slope of the city for sewage to flow under gravity.