Auflistung Alle Publikationen nach Mitwirkenden "Cirpka, Olaf A."
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Combining implicit geological modeling, field surveys, and hydrogeological modeling to describe groundwater flow in a karst aquifer
Abstract In three-dimensional (3-D) implicit geological modeling, the bounding surfaces between geological units are automatically constructed from lithological contact data (position and orientation) and the ... -
Denitrification‐Driven Transcription and Enzyme Production at the River‐Groundwater Interface: Insights From Reactive‐Transport Modeling
Störiko, Anna; Pagel, Holger; Mellage, Adrian; Van Cappellen, Philippe; Cirpka, Olaf A. (Water Resources Research, 2022-08-26)Molecular‐biological data and omics tools have increasingly been used to characterize microorganisms responsible for the turnover of reactive compounds in the environment, such as reactive‐nitrogen species in groundwater. ... -
Direct‐Push Color Logging Images Spatial Heterogeneity of Organic Carbon in Floodplain Sediments
Klingler, Stefan; Cirpka, Olaf A.; Werban, Ulrike; Leven, Carsten; Dietrich, Peter (Journal of Geophysical Research: Biogeosciences, 2020-12-10)In soils and sediments, large amounts of total organic carbon (TOC) mark reducing conditions. As dark sediment colors are good predictors for high‐TOC zones, they indicate hot spots of biogeochemical turnover and microbial ... -
Kombination geophysikalischer und hydrogeologischer Methoden zur gezielten Erkundung feinkörniger Talfüllungen
Klingler, Stefan; Martin, Simon; Cirpka, Olaf A.; Dietrich, Peter; Leven, Carsten (Grundwasser, 2021-10-05)Sedimentäre Strukturen können die Fließ- und Stofftransportpfade in feinkörnigen Talfüllungen stark beeinflussen. Diese Strukturen müssen gezielt auf ihre Ausdehnung und Eigenschaften untersucht werden, um Verweilzeiten, ... -
Spatial Markov Model for the Prediction of Travel‐Time‐Based Solute Dispersion in Three‐Dimensional Heterogeneous Media
In recent years, Spatial Markov Models have gained popularity in simulating solute transport in heterogeneous formations. They describe the transition times of particles between equidistant observation planes by statistical ... -
Strategies for Simplifying Reactive Transport Models: A Bayesian Model Comparison
Schäfer Rodrigues Silva, Aline; Guthke, Anneli; Höge, Marvin; Cirpka, Olaf A.; Nowak, Wolfgang (Water Resources Research, 2020-11-22)For simulating reactive transport on aquifer scale, various modeling approaches have been proposed. They vary considerably in their computational demands and in the amount of data needed for their calibration. Typically, ... -
Structural controls on the hydrogeological functioning of a floodplain
Martin, Simon; Klingler, Stefan; Dietrich, Peter; Leven, Carsten; Cirpka, Olaf A. (Hydrogeology Journal, 2020-08-22)Floodplains are often conceptualized as homogeneous sediment bodies which connect streams with their respective catchment and buffer agricultural inputs. This has led to a general bias within the hydrological community ... -
Systematic Evaluation of Geometry‐Driven Lateral River‐Groundwater Exchange in Floodplains
The widening and narrowing of river‐valley aquifers can cause valley‐scale lateral hyporheic exchange even if the river is straight and its slope is uniform. For the aforementioned system, we derive a semi‐analytical ...