Title: Betrachtungen zur Abschätzung von Denitrifikation im Grundwasser
Other Titles: Assessing denitrification in groundwater
Language: English
Authors: Schilling, Christian
Qualification level: Doctoral
Advisor: Zessner, Matthias
Assisting Advisor: Gutknecht, Dieter
Issue Date: 2006
Number of Pages: 197
Qualification level: Doctoral
In two selected Austrian case study regions denitrification in groundwater could be observed based on nitrogen surplus assessments in relation to groundwater and surface water quality observations.
Differences between the selected case study regions in respect to nitrogen fluxes and denitrification activity in subsurface zone could be related to hydrological circumstances, which were characterised by water balance calculations using the conceptual SWAT 2000 model. Using the empirical emission model MONERIS the total nitrogen emissions were calculated for both case study areas and the major emission pathways for nitrogen could be identified. An approach was developed for the calculation of diffuse nitrogen emissions to surface waters with consideration of denitrification processes in groundwater based on calculated groundwater residence times. This approach enabled the identification of catchment areas, which are responsible for most of the diffuse nitrogen emissions to the surface water and which are therefore highly sensitive in terms of controlling diffuse nitrogen emissions to the receiving coastal waters of the Black Sea. These areas could be clearly distinguished from areas, which are important for local groundwater protection and revealed the contrarious effects of measures related to specific protection goals with focus on either the reduction of nitrogen levels in groundwater or the reduction of nitrogen emissions to surface waters.
Keywords: Denitrifikation; Grundwasser; Wasserhaushaltsbilanzierung; Stickstoffemissionen; Grundwasseraufenthaltszeit
denitrification; groundwater; water balance calculations; nitrogen emission calculation; groundwater residence time
URI: https://resolver.obvsg.at/urn:nbn:at:at-ubtuw:1-14863
Library ID: AC05032717
Organisation: E226 - Institut für Wassergüte und Abfallwirtschaft 
Publication Type: Thesis
Appears in Collections:Thesis

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