thenews.com.pk 19 Sep, 2020 02:30 am

Rainwater harvesting system to be introduced in building-bylaws

Rainwater harvesting system to be introduced in building-bylaws
Islamabad : The Capital Development Authority is pondering over a proposal to introduce a rainwater harvesting system in building bye-laws that would make it necessary to have a storage tank on the...

Islamabad September 19, 2020 Islamabad : The Capital Development Authority (CDA) is pondering over a proposal to introduce a rainwater harvesting system in building bye-laws that would make it necessary to have a storage tank on the rooftop of every household in the capital city.According to the proposal, the capacity of the water storage tank would be 200 gallons for 5-marla house; 400 gallons for 10-marla house; 600 gallons for 1-kanal house; and 800 gallons for 2-kanal house.The size of storage tank has been proposed according to size of the rooftop and residential unit as well.The proposal also underlined the need for four Cs strategy -- capturing run-off from rooftops; capturing run-off from local catchments, capturing seasonal floodwaters from local streams and conserving water through watershed management.

According to the experts, the rainwater can be stored in any commonly used water storage container such as RCC masonry, plastic or polyethylene and it can also be charged into the ground water aquifer through any suitable structure like dug well, percolation well, boreholes, recharge trenches and water ponds.The rainwater harvesting system is being used as an alternative and supplementary source of water in many regions of the world and it holds considerable potential in Pakistan, especially in areas like Islamabad.

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