SS4.11 Water and Society - Science and Management in a Social and Economic Context
Date: Wednesday, June 12, 2002
Time: 4:15:00 PM
Location: Carson A
 
BrettarI, German Research Center for Biotechnology, Braunschweig, Germany, inb@gbf.de
Kern, J, , ATB, Potsdam, Germany, 
Sanchez-Perez, J, M, CEREG, ULP, Strasbourg, France, 
Tremolieres, M, , CEREG, ULP, Strasbourg, France, 
Höfle, M, G, GBF, Braunschweig, Germany, mho@gbf.de
 
NITROGEN RETENTION IN FLOODPLAIN FORESTS RESTORED FOR FLOOD RETENTION IN THE UPPER RHINE VALLEY (FRANCE/GERMANY)
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River management and chanelization of the Upper Rhine has led to a cut off of the major fraction of the pristine floodplain forests from the river resulting in major flooding problems in highly populated areas downstream. To counteract flooding, former floodplain forests are about to be restored to provide flood retention space ("polder"). In addition, management of the floodplain will try to improve river and ground water quality, especially with respect to the nitrogen-load. In the frame of a French-German collaborative programme, denitrification was studied in situ and in the lab as a major factor to reduce the N-load. Emphasis was put on factors that are influencing the rate of denitrification with respect to applications for polder management for optimal N-load reduction. From the investigations, recommendations could be derived for the management of the flooding regime as well as the floodplain area. The study sheds light on the multifacetted natural and societal values of natural or close to natural floodplains and their potential to improve societal life quality.