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Phosphorus concentrations of brook runoff in a Swiss agricultural catchment: longitudinal variability and subsurface drainage impact


Weisshaidinger, Rainer; Hebel, Bernd; Ogermann, Petra; Schneider, Philipp; Katterfeld, Christian; Koch, Randy (2005). Phosphorus concentrations of brook runoff in a Swiss agricultural catchment: longitudinal variability and subsurface drainage impact. In: Batalla, Ramon J; Garcia, Celso. Geomorphological Processes and Human Impacts in River Basins. Wallingford, UK: International Association of Hydrological Schiences IAHS, 81-88.

Abstract

Hydrological characteristics and water quality of anthropogenic subsurface drainage and brook runoff were observed in a small agricultural catchment near Basel (NW Switzerland). A two year monitoring programme provided concentration data for soluble Molybdate Reactive Phosphorus (MRP = Dissolved Reactive Phosphorus) for both base flow and storm events. Recurrence frequency and correlation analyses were conducted to evaluate the samples with regard to time–space variability as well as observance of eutrophication limits. Results suggest substantial MRP input into the brook system via subsurface drains, partly originating from private wastewater treatment facilities. Runoff, particularly in upstream brook sections, clearly exceeds eutrophication limits already at MRP concentrations (CMRP) of low recurrence frequency. During non-event periods a decrease in CMRP is obvious from upstream brook sections towards the catchment outlet as a result of dilution as well as hydrobiological and chemical processes.

Abstract

Hydrological characteristics and water quality of anthropogenic subsurface drainage and brook runoff were observed in a small agricultural catchment near Basel (NW Switzerland). A two year monitoring programme provided concentration data for soluble Molybdate Reactive Phosphorus (MRP = Dissolved Reactive Phosphorus) for both base flow and storm events. Recurrence frequency and correlation analyses were conducted to evaluate the samples with regard to time–space variability as well as observance of eutrophication limits. Results suggest substantial MRP input into the brook system via subsurface drains, partly originating from private wastewater treatment facilities. Runoff, particularly in upstream brook sections, clearly exceeds eutrophication limits already at MRP concentrations (CMRP) of low recurrence frequency. During non-event periods a decrease in CMRP is obvious from upstream brook sections towards the catchment outlet as a result of dilution as well as hydrobiological and chemical processes.

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Additional indexing

Item Type:Book Section, not refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Date:2005
Deposited On:04 Mar 2014 14:17
Last Modified:08 Dec 2017 04:41
Publisher:International Association of Hydrological Schiences IAHS
Number:299
ISBN:1-901502-28-7
Additional Information:Proceedings of the International Conference held at Solsona, Catalonia, Spain, May 2004
Related URLs:http://books.google.ch/books?id=Jz78L-ztSOgC&printsec=frontcover&hl=de#v=onepage&q&f=false

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