[Zurück]

D. Balla, T. Kalettka, O. Gabriel:
"Estimating phosphorus fluxes in wetland groundwater-surface water environments with respect to eutrophication";
Vortrag: HydroEco 2006: International Conference on Hydrology and Ecology, Karlovy Vary, Czech Republic; 11.09.2006 - 14.09.2006; in: "Proceedings", Ceská asociace hydrogeologu (CAH), (2006), S. 133 - 135.

In a watertable-controlled iron-rich peat site located in the German Spreewald wetland region, the phosphorus (P) dynamics were investigated, the P buffer mechanisms were analysed, and the P retention was balanced. The topographic, hydrological and geohydraulic conditions cause alternating regimes with infiltration, exfiltration, and inundation of the peat soils. The most dominant process in P-release and storage was found as an advective P-flux, estimated as -100 mg P m-2 d-1 (release) in case of exfiltration into the canal and 80 mg P m-2d-1 (storage) in case of infiltration into the groundwater zone. Considering precipitation with iron and sedimentation the total P release during exfiltration decreases to -3.14 mg m-2d-1. During infiltration total P storage amounts 30 mg m-2d-1. In all cases oxygenated surface water buffers the P-release.

wetlands; infiltration, exfiltration, inundation, P fluxes; field investigations; modelling

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC06585837