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Accueil du site → Doctorat → Allemagne → 2016 → An ecohydrological impact assessment in urban areas (City of Windhoek, Namibia)

Universität Potsdam (2016)

An ecohydrological impact assessment in urban areas (City of Windhoek, Namibia)

Shikangalah, Rosemary Ndawapeka

Titre : An ecohydrological impact assessment in urban areas (City of Windhoek, Namibia)

Auteur : Shikangalah, Rosemary Ndawapeka

Université de soutenance : Universität Potsdam

Grade : Doctor of Natural Sciences (Der. rer. nat.) in “Ecology” 2016

Résumé partiel
Over the last decades, the world’s population has been growing at a faster rate, resulting in increased urbanisation, especially in developing countries. More than half of the global population currently lives in urbanised areas with an increasing tendency. The growth of cities results in a significant loss of vegetation cover, soil compaction and sealing of the soil surface which in turn results in high surface runoff during high-intensity storms and causes the problem of accelerated soil water erosion on streets and building grounds. Accelerated soil water erosion is a serious environmental problem in cities as it gives rise to the contamination of aquatic bodies, reduction of ground water recharge and increase in land degradation, and also results in damages to urban infrastructures, including drainage systems, houses and roads. Understanding the problem of water erosion in urban settings is essential for the sustainable planning and management of cities prone to water erosion. However, in spite of the vast existence of scientific literature on water erosion in rural regions, a concrete understanding of the underlying dynamics of urban erosion still remains inadequate for the urban dryland environments.
This study aimed at assessing water erosion and the associated socio-environmental determinants in a typical dryland urban area and used the city of Windhoek, Namibia, as a case study. The study used a multidisciplinary approach to assess the problem of water erosion. This included an in depth literature review on current research approaches and challenges of urban erosion, a field survey method for the quantification of the spatial extent of urban erosion in the dryland city of Windhoek, and face to face interviews by using semi-structured questionnaires to analyse the perceptions of stakeholders on urban erosion.

Mots Clés : Risikoabbildung ; Wassererosion ; urbane Bodenerosion risk mapping ; urban soil erosion ; water erosion


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