Although the groundwater table in the State of Qatar peninsula is reducing, there is a persistent increasing level of groundwater in some areas in Doha city. This increasing tendency could be attributed to the topography of the area, geological structure, rapid urbanization, increase in water consumption, uncontrolled irrigation of farms and green areas as well as the absence of storm-water drainage system. To lower the groundwater table, a drainage system has been laid through Rayan and Wadi Musheirib which are the worst affected areas. This system drains away the groundwater as well as the stormwater to the Arabian Gulf. A qualitative and quantitative monitoring program was initiated in order to evaluate the possibility of utilizing this drained water. The results obtained indicate that the drainage water could be used for irrigating certain types of trees
