The Afghan government has deliberate the project of Kabul New metropolis (KNC) to deal with the fast boom of Kabul, an existing capital metropolis. because of climatic and topographical motives, it is meant that KNC suffers from a water scarcity problem. This observe investigates the feasibility of a rooftop rainwater harvesting machine in KNC to alleviate the water shortage trouble. An applicability of the rooftop rainwater harvesting device become discussed for numerous varieties of residential houses and schools, the use of eleven years rainfall statistics. This look at additionally tested the value-effectiveness of the system through thinking about the provider life of the device. moreover, an gold standard length of the rainwater storage tank changed into mentioned primarily based on the stability among harvested rainwater quantity, non-potable water demand, and cost-effectiveness.
Kabul is the capital metropolis of Afghanistan, and the metropolis is growing at fifth fastest speed inside the world. The current population in Kabul Metropolitan area is 4 million, and the range is two times as large as in 1999. This rapid population growth nonetheless maintains in Kabul metropolis, and the populace is anticipated to increase to six.five million in 2025 [1] . The fast increase in Kabul city has brought on numerous problems which includes water scarcity, deterioration of living environment and air pollutants.
The Afghan government has deliberate the mission of Kabul New metropolis (KNC) to cope with the fast populace boom and its impacts. The region of KNC is about 740 km², 1.five instances as huge as Kabul town, and 1.five million human beings live in this new town. KNC changed into strategically located between Bagram Airbase and Kabul global Airport, inside the north east of Kabul as shown in discern 1 [1] . the brand new metropolis is placed on the barren region vicinity, and a water scarcity is an critical problem to be solved in KNC mission.
because of climatic and topographic motives, it is tough to get permanent water sources around KNC. So, the mission planned several new water sources some distance from KNC, and also planned using rainwater to reduce the intake of water furnished from the brand new water assets.
This look at investigates the feasibility of a rooftop rainwater harvesting device to cope with the water scarcity hassle meant in KNC. The gadget collects the rainwater fallen on rooftops of homes, and it stores the water in a tank. The harvested rainwater is used as non-potable water, because Afghans infrequently accept the rainwater for potable use due to the price of water disinfection and filtration. This have a look at uses 11 years each day rainfall data, from 2006 to 2016, that’s newly opened for the studies.
The rooftop rainwater harvesting machine has already been proposed in a few nations which have the water scarcity problem. Abdulla and Al-Shareef [2] evaluated the ability of the rooftop rainwater harvesting device for potable water use in Jordanian, and cautioned the importance of preserving water satisfactory and amount in use of the machine. computer virus and Hattum [3] said that the gadget ought to be used while rainfall is over 50 mm/month or 300 mm/year, thinking about the environmental feasibility. Karnataka government in India implemented the rainwater harvesting device in 2005 [4] . Gotur and Devendrappa [4] confirmed that the machine labored properly in neighborhood vicinity, and it led a few financial benefits. Tripathi and Pandey [5] mentioned that the machine can satisfy the simple water requirement of the faculty for about 143 days during the water scarce duration. Domènech and Saurí [6] recommend that both guidelines and subsidies are accurate techniques to recommend and increase rainwater harvesting technology in residential areas.