as groundwater resources run out those in the informal settlements are most immediately affected smallscale farmers in the sanaa governorate are also vulnerable given that groundwater which represents their main source of income is depleting at a faster pace with each passing year which forces communities to relocate however for the city as a whole including informal settlements it would be easy to secure the drinking water source by reallocating per cent of the irrigation share in the basin to the domestic supply some physical investments and economic incentives are needed to apply this solution