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Dive into the research topics where Reinhard Well is active.

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Featured researches published by Reinhard Well.


Journal of Environmental Quality | 2009

Estimation of indirect nitrous oxide emissions from a shallow aquifer in Northern Germany.

Carolin von der Heide; Jürgen Böttcher; M. Deurer; Wilhelmus H. M. Duijnisveld; D. Weymann; Reinhard Well

Ground water is considered to be an important source for indirect N2O emissions. We investigated indirect N2O emissions from a shallow aquifer in Germany over a 1-yr period. Because N2O accumulated in considerable amounts in the surface ground water (mean, 52.86 microg N2O-N L(-1)) and corresponding fluxes were high (up to 34 microg N2O-N m(-2) h(-1)), it was hypothesized that significant indirect N2O emissions would occur via the vertical and the lateral emission pathway. Vertical N2O emissions were investigated by measuring N2O concentrations and calculating fluxes from the surface ground water to the unsaturated zone and at the soil surface. Lateral N2O fluxes were investigated by measuring ground water N2O and NO3- concentrations at five multilevel wells and at a waterworks well. Negligible amounts of N2O were emitted vertically into the unsaturated zone; most of it was convectively transported into the deeper autotrophic denitrification zone. Only a ground water level fall and rise triggered the emission of N2O (up to 3 microg N2O-N m(-2) h(-1)) into the unsaturated zone. Ground water-derived N2O was probably reduced during the upward diffusion, and soil surface emissions were governed by topsoil processes. Along the lateral pathway, N2O and NO3- concentrations decreased with increasing depth in the aquifer. Discharging ground water was almost free of N2O and NO3-, and indirect N2O emissions were small.


Biogeosciences | 2008

Groundwater N2O emission factors of nitrate-contaminated aquifers as derived from denitrification progress and N2O accumulation

D. Weymann; Reinhard Well; Heinz Flessa; C. von der Heide; M. Deurer; K. Meyer; C. Konrad; W. Walther


Catena | 2008

The dynamics of N2O near the groundwater table and the transfer of N2O into the unsaturated zone: A case study from a sandy aquifer in Germany

M. Deurer; C. von der Heide; Jürgen Böttcher; Wilhelmus H. M. Duijnisveld; D. Weymann; Reinhard Well


Biogeosciences | 2010

Kinetics of N2O production and reduction in a nitrate-contaminated aquifer inferred from laboratory incubation experiments

D. Weymann; Helmut Geistlinger; Reinhard Well; C. von der Heide; Heinz Flessa


Journal of Hydrology | 2008

Spatial variability of N2O concentrations and of denitrification-related factors in the surficial groundwater of a catchment in Northern Germany

C. von der Heide; Jürgen Böttcher; M. Deurer; D. Weymann; Reinhard Well; Wilhelmus H. M. Duijnisveld


European Journal of Soil Science | 2011

Emission of groundwater-derived nitrous oxide into the atmosphere: model simulations based on a 15N field experiment

Jürgen Böttcher; D. Weymann; Reinhard Well; C. von der Heide; Andreas Schwen; Heinz Flessa; Wilhelmus H. M. Duijnisveld


Nutrient Cycling in Agroecosystems | 2010

Spatial and temporal variability of N2O in the surface groundwater: a detailed analysis from a sandy aquifer in northern Germany

C. von der Heide; Jürgen Böttcher; M. Deurer; Wilhelmus H. M. Duijnisveld; D. Weymann; Reinhard Well


Biogeosciences Discussions | 2008

Assessment of excess N 2 and groundwater N 2 O emission factors of nitrate-contaminated aquifers in northern Germany

D. Weymann; Reinhard Well; Heinz Flessa; C. von der Heide; M. Deurer; K. Meyer; C. Konrad; W. Walther


Biogeosciences | 2014

Predicting the denitrification capacity of sandy aquifers from in situ measurements using push–pull 15 N tracer tests

W. Eschenbach; Reinhard Well; W. Walther


Geophysical research abstracts | 2013

Isotope effects and O-exchange with water during N2O production by denitrifying fungi

Lena Rohe; Gesche Braker; Reinhard Well; Anette Giesemann; Traute-Heidi Anderson; N. Wrage-Mönnig; Heinz Flessa

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Heinz Flessa

University of Göttingen

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D. Weymann

University of Göttingen

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Daniel Weymann

Forschungszentrum Jülich

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Lena Rohe

University of Göttingen

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W. Walther

Dresden University of Technology

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C. Konrad

Dresden University of Technology

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