30th IAHS World Congress on Housing, Coimbra, Portugal, 9 - 13 September 2002, pp.873-879
Population increase together with uncontrolled settlements, in the form of mass housing and squatter houses, constitute a major issue for cities in the process of rapid urbanization. High quantities of migrating population settling in unplanned areas with improper infrastructure at high densities lead to environmental deterioration. The case of the mega city of Istanbul is presented as an example, with the impact of unplanned settlements in the watersheds of drinking water reservoirs.