As groundwater resources run out, those in the informal settlements are most immediately affected. Small-scale farmers in the Sana'a 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 5-10 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.