A5043126994- Groundwater flow and contamination studies
- Hydrology and Watershed Management Studies
- Groundwater and Isotope Geochemistry
- Hydrology and Sediment Transport Processes
- Microbial bioremediation and biosurfactants
- Flood Risk Assessment and Management
- Urban Stormwater Management Solutions
- Water resources management and optimization
- Water Treatment and Disinfection
- Pharmaceutical and Antibiotic Environmental Impacts
- Soil and Water Nutrient Dynamics
- Reservoir Engineering and Simulation Methods
- Water Quality Monitoring and Analysis
- Water Quality and Pollution Assessment
- Hydrological Forecasting Using AI
- Soil erosion and sediment transport
- Toxic Organic Pollutants Impact
- CO2 Sequestration and Geologic Interactions
- Water Systems and Optimization
- Geophysical Methods and Applications
- Atmospheric and Environmental Gas Dynamics
- Groundwater and Watershed Analysis
- Geophysical and Geoelectrical Methods
- Arsenic contamination and mitigation
- Methane Hydrates and Related Phenomena
Swiss Federal Institute of Aquatic Science and Technology
2016-2025
University of Neuchâtel
2015-2024
Université Laval
2023-2024
University of Graz
2022-2023
Helmholtz Centre for Environmental Research
2001-2010
Deutsches Biomasseforschungszentrum
1999-2004
University of Waterloo
1997-2001
University of Stuttgart
1995
Berliner Verkehrsbetriebe (Germany)
1990
University of Bonn
1954
Rivers are important ecosystems under continuous anthropogenic stresses. The hyporheic zone is a ubiquitous, reactive interface between the main channel and its surrounding sediments along river network. We elaborate on physical, biological, biogeochemical drivers processes within that have been studied by multiple scientific disciplines for almost half century. These previous efforts shown modulator most metabolic stream serves as refuge habitat diverse range of aquatic organisms. It also...
Abstract. Streambed temperatures can be easily, accurately and inexpensively measured at many locations. To characterize patterns of groundwater-stream water interaction with a high spatial resolution, we 140 vertical streambed temperature profiles along 220 m section small man-made stream. Groundwater sufficient depth remains nearly constant while stream vary seasonally diurnally. In summer, groundwater discharge zones are relatively colder than downwelling water. Assuming flow in the...
Kueffer, C., E. Underwood, G. Hirsch Hadorn, R. Holderegger, M. Lehning, C. Pohl, Schirmer, Schwarzenbach, Stauffacher, Wuelser, and P. Edwards. 2012. Enabling effective problem-oriented research for sustainable development. Ecology Society 17(4): 8. https://doi.org/10.5751/ES-05045-170408
Abstract The profound effects of urbanization on groundwater recharge rates are investigated by conducting a comprehensive land use and cover analysis in Arusha, Tanzania, using the WetSpass model. Between 1995 2016, urban area has expanded from 14 to 45% within study area. This rapid resulted conversion forested areas, agricultural land, shrublands, bare soil into zones. Results indicated that under preurban conditions, precipitation was ~116 mm/year, which increased an average 148 mm/year...
Abstract. The spatial distribution of groundwater fluxes through a streambed can be highly variable, most often resulting from heterogeneous aquifer and permeabilities along the flow pathways. Using heat transport model, we defined four scenarios permeability distributions to simulate assess impact subsurface heterogeneity on streambed: (a) homogeneous low-K within aquifer; (b) (c) well connected (d) poorly aquifer. simulation results were compared with base case scenario, in which had same...
The assessment of micropollutants in the urban aquatic environment is a challenging task since both water balance and contaminant concentrations are characterized by pronounced variability time space. In this study central European drainage catchment quantified for period one year. On basis concentration monitoring several micropollutants, mass area's wastewater, surface water, groundwater derived. release from was mainly driven discharge wastewater treatment plant. However, combined sewer...
The sustainability of agriculture in the Mediterranean climate is challenged by high irrigation water demands and nitrogen fertilizer losses to environment, causing significant pressure on groundwater resources groundwater-dependent ecosystems. Advanced technologies improved management have been promoted as key solutions reduce agricultural impact aquatic systems. However, it remains unclear how different irrigation-fertilizer practices perform long-term under a highly variable climate, such...
The process that transfers mass from a subsurface source zone of residual dense nonaqueous phase liquid (DNAPL) to the flowing groundwater is controlling factor in determining time required dissolve by noninvasive means. While transfer can be kinetic or equilibrium under laboratory conditions, aqueous concentrations field are generally found below levels. To gain insight into we simulated dissolution emplaced DNAPL at Canadian Forces Base Borden, Ontario, which contains mixture three DNAPLs....
Abstract. River restoration projects have been launched over the last two decades to improve ecological status and water quality of regulated rivers. As most restored rivers are not monitored at all, it is difficult predict consequences or analyze why restorations fail successful. It thus necessary implement efficient field assessment strategies, for example by employing sensor networks that continuously measure physical parameters high spatial temporal resolution. This paper focuses on...