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Dive into the research topics where Klaus Mosthaf is active.

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Featured researches published by Klaus Mosthaf.


Water Resources Research | 2017

Heat and water transport in soils and across the soil‐atmosphere interface: 2. Numerical analysis

Thomas Fetzer; Jan Vanderborght; Klaus Mosthaf; Kathleen M. Smits; Rainer Helmig

In an accompanying paper, we presented an overview of a wide variety of modeling concepts, varying in complexity, used to describe evaporation from soil. Using theoretical analyses, we explained the simplifications and parameterizations in the different approaches. In this paper, we numerically evaluate the consequences of these simplifications and parameterizations. Two sets of simulations were performed. The first set investigates lateral variations in vertical fluxes, which emerge from both homogeneous and heterogeneous porous media, and their importance to capturing evaporation behavior. When evaporation decreases from parts of the heterogeneous soil surface, lateral flow and transport processes in the free flow and in the porous medium generate feedbacks that enhance evaporation from wet surface areas. In the second set of simulations, we assume that the vertical fluxes do not vary considerably in the simulation domain and represent the system using one-dimensional models which also consider dynamic forcing of the evaporation process, for example, due to diurnal variations in net radiation. Simulated evaporation fluxes subjected to dynamic forcing differed considerably between model concepts depending on how vapor transport in the air phase and the interaction at the interface between the free flow and porous medium were represented or parameterized. However, simulated cumulative evaporation losses from initially wet soil profiles were very similar between model concepts and mainly controlled by the desorptivity, Sevap, of the porous medium, which depends mainly on the liquid flow properties of the porous medium.


Journal of Contaminant Hydrology | 2016

Characterization of chlorinated solvent contamination in limestone using innovative FLUTe® technologies in combination with other methods in a line of evidence approach.

Mette Martina Broholm; Gry Sander Janniche; Klaus Mosthaf; Annika Sidelmann Fjordbøge; Philip John Binning; Anders G. Christensen; Bernt Grosen; Torben H. Jørgensen; Carl Keller; Gary Wealthall; Henriette Kerrn-Jespersen

Characterization of dense non-aqueous phase liquid (DNAPL) source zones in limestone aquifers/bedrock is essential to develop accurate site-specific conceptual models and perform risk assessment. Here innovative field methods were combined to improve determination of source zone architecture, hydrogeology and contaminant distribution. The FACT™ is a new technology and it was applied and tested at a contaminated site with a limestone aquifer, together with a number of existing methods including wire-line coring with core subsampling, FLUTe® transmissivity profiling and multilevel water sampling. Laboratory sorption studies were combined with a model of contaminant uptake on the FACT™ for data interpretation. Limestone aquifers were found particularly difficult to sample with existing methods because of core loss, particularly from soft zones in contact with chert beds. Water FLUTe™ multilevel groundwater sampling (under two flow conditions) and FACT™ sampling and analysis combined with FLUTe® transmissivity profiling and modeling were used to provide a line of evidence for the presence of DNAPL, dissolved and sorbed phase contamination in the limestone fractures and matrix. The combined methods were able to provide detailed vertical profiles of DNAPL and contaminant distributions, water flows and fracture zones in the aquifer and are therefore a powerful tool for site investigation. For the limestone aquifer the results indicate horizontal spreading in the upper crushed zone, vertical migration through fractures in the bryozoan limestone down to about 16-18m depth with some horizontal migrations along horizontal fractures within the limestone. Documentation of the DNAPL source in the limestone aquifer was significantly improved by the use of FACT™ and Water FLUTe™ data.


Journal of Hydrology | 2018

Conceptualization of flow and transport in a limestone aquifer by multiple dedicated hydraulic and tracer tests

Klaus Mosthaf; Bentje Brauns; Annika Sidelmann Fjordbøge; Magnus Rohde; Henriette Kerrn-Jespersen; Poul Løgstrup Bjerg; Philip John Binning; Mette Martina Broholm


InterPore 10th Annual Meeting and Jubilee | 2018

Model-based interpretation of tracer tests in fractured limestone and clayey till

Klaus Mosthaf; Peter Jørgensen; Rasmus Thalund-Hansen; Mette Martina Broholm; Poul Løgstrup Bjerg; Massimo Rolle


Water Resources Research | 2017

Heat and water transport in soils and across the soil-atmosphere interface: 2. Numerical analysis: EVAPORATION: NUMERICAL SIMULATIONS

Thomas Fetzer; Jan Vanderborght; Klaus Mosthaf; Kathleen M. Smits; Rainer Helmig


Water Resources Research | 2017

Heat and water transport in soils and across the soil-atmosphere interface: 1. Theory and different model concepts: EVAPORATION: THEORY AND CONCEPTS

Jan Vanderborght; Thomas Fetzer; Klaus Mosthaf; Kathleen M. Smits; Rainer Helmig


Modeling and benchmarking of fractured porous media: Flow, transport and deformation - 2017 (MBFPM) | 2017

Modeling of flow and transport processes in a fractured limestone aquifer

Klaus Mosthaf; Annika Sidelmann Fjordbøge; Bentje Brauns; Mette Martina Broholm; Poul Løgstrup Bjerg; Magnus Rohde; Niels D. Overheu; Henriette Kerrn-Jespersen; Philip John Binning


2017 NGWA Conference on Fractured Rock and Groundwater | 2017

Conceptualization of contamination using depth discrete monitoring of dynamic PCE concentration changes during pumping

Mette Martina Broholm; Annika Sidelmann Fjordbøge; Klaus Mosthaf; Philip John Binning; Bentje Brauns; Poul Løgstrup Bjerg; Henriette Kerrn-Jespersen


14th International Conference Sustainable Use and Management of Soil, Sediment and Water Resources (AquaConSoil) | 2017

Conceptualization of residual contamination using depth discrete monitoring of dynamic PCE concentration changes during and after remedial pumping and pumping test

Mette Martina Broholm; Annika Sidelmann Fjordbøge; Klaus Mosthaf; Philip John Binning; Bentje Brauns; Theodora Tsitseli; Poul Løgstrup Bjerg; Henriette Kerrn-Jespersen


XXI International Conference Computational Methods in Water Resources, CMWR 2016 | 2016

Modeling contaminant plumes in fractured limestone in 3-D: comparison of modeling approaches

Klaus Mosthaf; Annika Sidelmann Fjordbøge; Mette Martina Broholm; Poul Løgstrup Bjerg; Philip John Binning

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Mette Martina Broholm

Technical University of Denmark

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Philip John Binning

Technical University of Denmark

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Poul Løgstrup Bjerg

Technical University of Denmark

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Bentje Brauns

Technical University of Denmark

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Gry Sander Janniche

Technical University of Denmark

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