A5001380437- Hydrology and Watershed Management Studies
- Hydrology and Drought Analysis
- Flood Risk Assessment and Management
- Climate variability and models
- Water resources management and optimization
- Groundwater flow and contamination studies
- Cryospheric studies and observations
- Environmental Monitoring and Data Management
- Groundwater and Isotope Geochemistry
- Hydrological Forecasting Using AI
- Oceanographic and Atmospheric Processes
- Meteorological Phenomena and Simulations
- Species Distribution and Climate Change
- Climate change impacts on agriculture
- Data Visualization and Analytics
- Hydrology and Sediment Transport Processes
- Seismic Imaging and Inversion Techniques
- Geophysics and Gravity Measurements
- Soil and Water Nutrient Dynamics
- Plant Water Relations and Carbon Dynamics
- Educational Tools and Methods
- Cardiac Valve Diseases and Treatments
- Climate change and permafrost
University of Freiburg
2012-2023
Risk management has reduced vulnerability to floods and droughts globally1,2, yet their impacts are still increasing3. An improved understanding of the causes changing is therefore needed, but been hampered by a lack empirical data4,5. On basis global dataset 45 pairs events that occurred within same area, we show risk generally reduces faces difficulties in reducing unprecedented magnitude not previously experienced. If second event was much more hazardous than first, its impact almost...
Abstract. Drought events and their impacts vary spatially temporally due to diverse pedo-climatic hydrologic conditions, as well variations in exposure vulnerability, such demographics response actions. While hazard severity frequency of past drought have been studied detail, little is known about the effect management strategies on actual how perceived by relevant stakeholders. In a continental study, we characterised assessed perceptions two recent (2018 2019) Europe examined relationship...
One of the most important functions catchments is storage water. Catchment buffers meteorological extremes and interannual streamflow variability, controls partitioning between evaporation runoff, influences transit times Hydrogeological data to estimate are usually scarce seldom available for a larger set catchments. This study focused on in prealpine alpine catchments, using 21 Swiss comprising different elevation ranges. comparisons depend definitions. defines types including definitions...
Abstract. Streamflow recession has been investigated by a variety of methods, often involving the fit model to empirical plots parameterize non-linear storage–outflow relationship based on dQ/dt−Q method. Such analysis methods (RAMs) are used estimate hydraulic conductivity, storage capacity, or aquifer thickness and streamflow curves for regionalization prediction at catchment scale. Numerous RAMs have published, but little is known about how comparably resulting models distinguish...
Abstract Streamflow drought response depends to a large degree on groundwater recharge. To better predict and preempt streamflow droughts, the relationship between recharge deficit needs be studied more systematically. We present combined soil‐vegetation‐atmosphere transfer conceptual model experiment that applies novel set of scenarios preceding events in humid‐temperate catchments with different dominant aquifer types. The are based permutation historical time series modified matching...
Abstract. Droughts often have a severe impact on the environment, society, and economy. The variables scales that are relevant to understand of drought motivated this study, which compared hazard propagation characteristics, as well impacts, major droughts between 1990 2019 in southwestern Germany. We bring together high-resolution datasets air temperature, precipitation, soil moisture simulations, streamflow groundwater level observations, text-based information impacts. Various...
Abstract. Understanding components of the total streamflow is important to assess ecological functioning rivers. Binary or two-component separation into a quick and slow (often referred as baseflow) component are often based on arbitrary choices parameters also merge different delayed one baseflow index (BFI). As generation during dry weather results from drainage multiple sources, we propose extend BFI by delayed-flow (DFI) considering dynamics contributions streamflow. The DFI...
Abstract. As the adverse impacts of hydrological extremes increase in many regions world, a better understanding drivers changes risk and is essential for effective flood drought management climate adaptation. However, there currently lack comprehensive, empirical data about processes, interactions, feedbacks complex human–water systems leading to impacts. Here we present benchmark dataset containing socio-hydrological paired events, i.e. two floods or droughts that occurred same area. The...
Abstract. Nowadays color in scientific visualizations is standard and extensively used to group, highlight or delineate different parts of data visualizations. The rainbow map (also known as jet map) famous for its appealing use the full visual spectrum with impressive changes chroma luminance. Besides attracting attention, science has decades criticized non-linear erratic change hue luminance along variation. missed uniformity causes a misrepresentation values flaws communication....
Groundwater is the main source of freshwater and maintains streamflow during drought. Potential future groundwater baseflow drought hazards depend on systems' sensitivity to altered recharge conditions. We performed model experiments using three different generic stress tests estimate changes in recharge. The stem from a stakeholder co-design process that specifically followed idea altering known events past, i.e. asking whether could have made particular event worse. Across Germany,...
Abstract Previous work has shown that streamflow response during baseflow conditions is a function of storage, but also this functional relationship varies among seasons and catchments. Traditionally, hydrological models incorporate conceptual groundwater consisting linear or non‐linear storage–outflow functions. Identification the right model structure parameterization however challenging. The aim paper to systematically test different structures in set catchments where aquifer types govern...
Abstract Elevated nitrate concentrations in groundwater are a common challenge for water management. One important factor this context is higher frequencies and intensities of wet‐dry cycles that may cause increased due to flushes after drought termination. Yet systematic studies on regional‐scale impacts droughts missing so far. Here we analyzed time series 44 shallow wells 41 springs all across the German Federal State Baden‐Wuerttemberg from 2000 2018 characterize patterns post‐drought...
Abstract. Precipitation deficits and temperature anomalies are often the main cause for low flows summer streamflow droughts. However, where groundwater is contribution to sustain water availability ecological integrity during dry spells, role of recharge catchment storage crucial understand drought sensitivity. Here we introduce stress tests as complement climate scenarios characterize quantify sensitivities catchments. The presented by applying them six headwater catchments in Switzerland...
Abstract. Streamflow recession has been investigated by a variety of methods, often involving the fit model to empirical plots parameterize non-linear storage-outflow relationship. Such analysis methods (RAMs) are used estimate hydraulic conductivity, storage capacity, or aquifer thickness and streamflow curves for regionalization prediction at catchment scale. Numerous RAMs have published, but little is known about how characteristic resulting models distinguish behavior. In this study we...
Abstract. Understanding components of the total streamflow is important to assess ecological functioning rivers. Binary or two-component separation into a quick- and slow (often referred as baseflow) component, associated often used baseflow index (BFI), have been criticised for their arbitrary choice parameters. These methods also merge different delayed in one component. As generation during dry weather results from drainage multiple sources, we propose novel flow (DFI) considering...
Abstract. Drought events and their impacts vary spatially temporally due to diverse pedo-climatic hydrologic conditions, as well variations in exposure vulnerability, such demographics response actions. While hazardous severity frequency of past drought have been studied detail, little is known about the effect management strategies on actual impacts, how hazard perceived by relevant stakeholders for inducing action. In a continental study, we characterised assessed perceptions two recent...
Abstract. Groundwater is the main source of freshwater and maintains streamflow during drought. Potential future groundwater baseflow drought hazards depend on systems' sensitivity to altered recharge conditions. We performed model experiments using three different generic scenarios estimate groundwater- changes in recharge. The stem from a stakeholder co-design process that specifically followed idea altering known events past, i.e. asking whether could have made particular event worse....
Abstract. As the adverse impacts of hydrological extremes increase in many regions world, a better understanding drivers changes risk and is essential for effective flood drought management climate adaptation. However, there currently lack comprehensive, empirical data about processes, interactions feedbacks complex human-water systems leading to impacts. Here we present benchmark dataset containing socio-hydrological paired events, i.e., two floods or droughts that occurred same area. The...
Abstract. Droughts often have a severe impact on environment, society, and economy. Only multifaceted assessment of such droughts their impacts can provide insights in the variables scales that are relevant for drought management. Motivated by this aim, we compared hazard propagation characteristics as well major between 1990–2019 Southwestern Germany. We bring together high-resolution datasets air temperature, precipitation, soil moisture simulations, streamflow groundwater level...
Abstract. The stable isotopes of oxygen and hydrogen, 18O 2H, provide information on water flow pathways hydrologic catchment functioning. Here a data set time series precipitation streamflow isotope composition in medium-sized Swiss catchments, CH-IRP, is presented that unique terms its long-term multi-catchment coverage along an alpine to pre-alpine gradient. comprises fortnightly both δ2H δ18O as well deuterium excess from for 23 sites Switzerland, together with summary statistics the...