Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Distribution of water quality parameters in two cross-sections of the river Elbe measured with high local, temporal, and analytic resolution
Autor Böhme, M.;
Journal / Serie Acta Hydrochimica et Hydrobiologica
Erscheinungsjahr 2006
Department FLOEK;
Band/Volume 34
Heft 3
Sprache englisch;
Keywords transverse mixing; groyne field; phytoplankton; sedimentation; dead zone model
Abstract The river Elbe is a large eutrophic lowland river with high primary production and high phytoplankton biomass in the growing season. The objective of the study was to gain basic knowledge of the role of dead zones for phytoplankton distribution and the oxygen balance of the river Elbe. At two sampling stations water temperature, oxygen concentration, conductivity, pH value, turbidity, and chlorophyll fluorescence were measured with high precision to learn about the distribution of these parameters across the cross-sections. The structures indicate differences in the intensity of physical and biological processes between the shallow waters near the shores, which are characterized by groyne fields, and the deep bulk flow. The conductivity clearly shows the high transverse mixing intensity in the groyne fields in contrast to the bulk flow. Groyne fields and the first, the groyne head near margin lamella of the bulk flow can be regarded as a unit. Groyne field results indicate higher primary production of phytoplankton, oxygen release, and higher pH. The turbidity of water entering the groyne fields decreases rapidly because of sedimentation within a short time. The groyne head lamella of the bulk now sometimes shows higher chlorophyll fluorescence than the central lamella of the bulk flow and the water of the groyne field. The processes which contribute to the observed distribution are discussed, but could not yet be quantified. A modification of the dead zone model is proposed.
ID 2534
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=2534
Böhme, M. (2006):
Distribution of water quality parameters in two cross-sections of the river Elbe measured with high local, temporal, and analytic resolution
Acta Hydrochim. Hydrobiol. 34 (3), 201 - 213