著者

Obaidullah RAHIMI Keisuke MURAKAMI

出版者

公益社団法人 土木学会

雑誌

土木学会論文集G(環境) (ISSN:21856648)

巻号頁・発行日

vol.73, no.5, pp.I_25-I_30, 2017 (Released:2018-01-15)

参考文献数

8

被引用文献数

4

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The Afghan government has planned the project of Kabul New City (KNC) in order to deal with the rapid growth of existing capital city, Kabul. The area of KNC is 1.5 times of existing Kabul City. The location of this new city is on a desert area beside the existing Kabul, and it is also surrounded by some watersheds with steep slope topography. Due to these topographical reasons, KNC will suffer a water scarcity problem. This study investigates the feasibility of a rooftop rainwater harvesting system in KNC to relieve the water scarcity problem. The volume of water which could be harvested by the system is estimated with using 10 years rainfall data. The volume of non-potable water consumption is also estimated from the current water use in Kabul city. As a case study, the efficiency of the rooftop rainwater harvesting system is cleared for a primary school, some types of houses and commercial buildings. An appropriate size of the water harvesting tank is also discussed based on the balance between harvested water volume and non-potable water demand.