Water quality assessment and management of lowland river catchment [Elektronische Ressource] / vorgelegt von Lam Quang Dung

Water quality assessment and management of lowland river catchments Dissertation Zur Erlangung des Doktorgrades der Mathematisch-Naturwissenschaftlichen Fakultät der Christian-Albrechts-Universität zu Kiel vorgelegt von MSc. Lam Quang Dung Department of Hydrology and Water Resources Management Institute for the Conservation of Natural Resources Kiel University, Kiel, Germany April 2011 Referentin: Prof. Dr. Nicola Fohrer Koreferentin: Prof. Dr. Natascha Oppelt Koreferent: Tag der mündlichen Prüfung: 07 June 2011 Zum Druck genehmigt: Der Dekan Summary Summary This dissertation describes at first the hydrology and the long-term impact of point and diffuse source pollution on nutrient loads based on the current agricultural practices and sewage disposals in rural lowland catchments. The evaluations of Best Management Practices (BMPs) for water quality improvement was then implemented aiming at controlling and reducing pollution from point and diffuse sources in the entire catchments. The study catchments including Kielstau catchment (50 km²) and its subcatchment (7.6 km²), namely Moorau catchment, are located in the North German lowlands. These catchments are characterized by low hydraulic gradients, shallow groundwater, and flat topography. Sandy, loamy and peat soils are characteristic for these catchments.