Hütelmoor catchment

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Map of the catchment area
River bed swell at the outlet of the catchment
Dune breach 2011 close to the Heiligen See, Baltic Sea
Possible future evolution of the nature conservation area Huetelmoor / Heiliger See, in the landscape unit of the Rostocker Heide in the next 7 a, 35 a and 70 a, after dune breach, development plan for the nature conservation area Huetelmoor / Heiliger See, Mecklenburg-Western Pomerania
View into the flooded catchment in Spring 2011
Meteorological station in the catchment
Chamber insitu measurment of CH4

Contents

Location

In the Rostocker Heide, Mecklenburg-Western Pomerania, Germany, 54°12′ N, 12°10′ E

Catchment size

10 km²

Climate

Maritime, anual precipitation 610 mm, anual ETp 640 mm, mean yearly temperature 8.3°C

Geology

Glacifuvial, with intensive peat evolution

The fen is separated from the Baltic Sea by a dune dike installed in 1963 which increased fresh water supply. The area had been intensively drained for meadow usage since the 1970s with dropping water levels down to 1.60 m below ground surface. Peat decomposed rapidly and was identified as sapric histosol in 2010. Peat depths range between 1 and 3 m with alternating layers of sandy sediments as a result of flooding events. In the 1990s, decreasing yields due to proceeding peat degradation promoted the shift to a more ecological focus on peatland use across mid-Europe. For nature protection purposes first restoration measures were taken in 1992 by closing the main ditch (Schoenfeld-Bockholdt et al. 2005). Almost 20 years later, in 2009 a river bed sill was installed to permanently increase the water level to or above ground surface. Since then, the fen is permanently inundated with water levels up to 1.00 m above ground surface. During the last severe storm serge 1995 the dune dike breached and the complete wetland site was flooded. In the course of coastal protection the dune was rebuild. Due to redevelopment strategies the closed by village Markgrafenheide was secured by a ring dike and the coast line with the dike dune of the nature conservation area was abandoned which lead to a decay of dune and breakwaters.

Topography

0-40 m above sea level

Vegetation/Land use

Forest 60 %, pasture 30%, fen 10% dominant vegetation in the fen by a patchy pattern of dense Common reed stands (Phragmites australis) at drier parts sedge (Carex acutiformis) mixed stands of Sea and Grey Clubrush (Bolboschoenus maritimus (L.) Palla, Schoenoplectus tabernaemontani (C.C. Gmel.) Palla) present relics of former brackish conditions

Context of investigation

CH4 emission, salinisation, hydrological processes, interactions to nature conservation strategies

Measurements/Equipment

Links to project webpages

other Links

References

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