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Trunk Infrastructure and Urban Growth - Managing Rapid Informal Urbanisation under Poverty in Dar es Salaam, Tanzania

Alexandra Hill (1), Tanja Hühner, (2), Christian Lindner (1), Dr. Wolfgang Scholz (3) (1) Institute of Spatial Planning (IRPUD), TU Dortmund (2) Chair of Supply and Disposal Systems, Faculty of Spatial Planning, TU Dortmund (3) DAAD Lecturer, School of Urban and Regional Planning, Ardhi University, Tanzania

Urban growth in Sub-Saharan Africa is characterised by rapid urbanisation under poverty accompanied by weak planning systems. Accordingly, most of the urban development takes place informally leading to an inefficient supply with trunk infrastructure and basic services. In Dar es Salaam this accounts for about 70% of the settlement area. Uncontrolled urban sprawl at the periurban fringes of the city has increasingly encroached open spaces where the ex-post provision of infrastructure leads to disproportionate costs or is barely impossible.

The presentation will introduce selected findings from a research project dealing with the mutual interlinkages between urban growth and trunk infrastructure. Some characteristics and mechanisms of Dar es Salaam’s urban development and the need for a more cooperative action of all stakeholders involved will be highlighted. To support a more integrated and sustainable planning approach appropriate action recommendations will be presented.

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