May 2018
GloW Field Campaign
The field team started with the experimental set-up of the global karst monitoring program. They have been installing ~500 soil moisture probes in 5 different climate regions to study evapotranspiration and recharge processes in karst.
August 2017
GloW Project kicks off
Global Assessment of Water Stress in Karst Regions in a Changing World (GloW):
a research project funded by the German Research Foundation kicks off at the Faculty of Environment and Natural Resources at the University of Freiburg. See press release. |
June 2017
Contribution to CUAHSI CYBERSEMINAR
Where in the world is subgrid heterogeneity and lateral redistribution likely important to ET over a large ESM model grid?
As part of CUAHSI's Cyberseminar Series on Hillslope Hydrology in Earth System Models.
Find me after Elham Rouholahnejad Freund's and Jim Kirchner's talk at ~32:00 min.
As part of CUAHSI's Cyberseminar Series on Hillslope Hydrology in Earth System Models.
Find me after Elham Rouholahnejad Freund's and Jim Kirchner's talk at ~32:00 min.
April 2017
Session on Groundwater Age Dating at EGU 2017
HS8.2.7: Estimation and application of groundwater ages and mean residence times
Conveners: Andreas Hartmann, Martin Kralik , Scott Jasechko, Daren Gooddy
Invited speakers
Tom Gleeson (University of Victoria, CA)
Ate Visser (Lawrence Livermore National Laboratory, USA)
Description
Estimates of the Mean Residence Time (MRT) or age distributions of groundwater can be used to understand the flow and storage characteristics of aquifers including impacts of subsurface heterogeneity, surface-groundwater interactions, groundwater recharge dynamics and many other processes.
Hence they are valuable tools to protect groundwater dependent eco-systems, to estimate the vulnerability and the recovery-time of groundwater bodies impacted by pollution, to define drinking water protection areas and planning the sustainable use of water resources, to quantify quality problems due to climate change impacts.
The session wants to bring together experience of applied resource management and advanced research using a wide range of different techniques (tracer techniques, modelling, etc.) and to estimate groundwater age-distributions in variable aquifers at various spatial scales.
You are cordially invited to submit an abstract until January 11th 2017.
Conveners: Andreas Hartmann, Martin Kralik , Scott Jasechko, Daren Gooddy
Invited speakers
Tom Gleeson (University of Victoria, CA)
Ate Visser (Lawrence Livermore National Laboratory, USA)
Description
Estimates of the Mean Residence Time (MRT) or age distributions of groundwater can be used to understand the flow and storage characteristics of aquifers including impacts of subsurface heterogeneity, surface-groundwater interactions, groundwater recharge dynamics and many other processes.
Hence they are valuable tools to protect groundwater dependent eco-systems, to estimate the vulnerability and the recovery-time of groundwater bodies impacted by pollution, to define drinking water protection areas and planning the sustainable use of water resources, to quantify quality problems due to climate change impacts.
The session wants to bring together experience of applied resource management and advanced research using a wide range of different techniques (tracer techniques, modelling, etc.) and to estimate groundwater age-distributions in variable aquifers at various spatial scales.
You are cordially invited to submit an abstract until January 11th 2017.
December 2016
Two invited presentations at the AGU Fall meeting at San Francisco
Large-scale assessment of present day and future groundwater recharge and its sensitivity to climate variability in Europe’s karst regions.
In this presentation I will present the newest results of applying my large-scale karst recharge simulation model with climate change projections. Due to karstic heterogeneity processes present and future is larger than previously estimated by large-scale simulation apporaches that assume mostly homogeneous subsurface properties.
Come to the karst session (H018: Characterization, Modeling, and Remediation of Fissured, Carbonate, and Karst Groundwater Systems) if you want to learn more ... (link will be added as soon as the programme is available)
Large-scale simulation of karst processes - parameter estimation, model evaluation and quantification of uncertainty
Here, my presentation will focus on the parameterization and evaluation of the large-scale karst process. As karstic subsurface heterogenity results in more complexity, advanced parameter estimation approaches have to be applied and uncertaintly has to be taken into account explicitely.
Come to the hydrological landscapes session (H064: Investigations of dominant hydrologic processes across diverse landscapes) if you want to learn more ... (link will also be added as soon as the programme is available)
In this presentation I will present the newest results of applying my large-scale karst recharge simulation model with climate change projections. Due to karstic heterogeneity processes present and future is larger than previously estimated by large-scale simulation apporaches that assume mostly homogeneous subsurface properties.
Come to the karst session (H018: Characterization, Modeling, and Remediation of Fissured, Carbonate, and Karst Groundwater Systems) if you want to learn more ... (link will be added as soon as the programme is available)
Large-scale simulation of karst processes - parameter estimation, model evaluation and quantification of uncertainty
Here, my presentation will focus on the parameterization and evaluation of the large-scale karst process. As karstic subsurface heterogenity results in more complexity, advanced parameter estimation approaches have to be applied and uncertaintly has to be taken into account explicitely.
Come to the hydrological landscapes session (H064: Investigations of dominant hydrologic processes across diverse landscapes) if you want to learn more ... (link will also be added as soon as the programme is available)
December 2016
Convening again the AGU Session
Convening again the AGU Session
Saturated and Unsaturated Flow in Structurally Variable Pathways
Session Description:
Structurally and temporally variable pathways exist in soil, bedrock, and at the soil-bedrock interface. Some of the factors that control saturated and unsaturated flow in variable pathways are vegetation, alteration of soils by fire, precipitation of solutes, shrinking and swelling, bedrock topography, erosion of soil pipes, growth of microorganisms, and solubility of the solid material (e.g. karst). The flow of water and transported substances through variable pathways poses hydrologic challenges that are central to major practical concerns. Cutting-edge scientific opportunities arise from the temporal evolution of these flowpaths, and their enhanced likelihood of deviation from traditional models and theory. This session solicits abstracts that provide new insights in hydrologic processes in variable flowpaths, compare those processes across varying terrains, or explore the value of new and existing concepts and methods.
Conveners:
Andreas J Hartmann, Freiburg University, Chair of Hydrology, Freiburg, Germany; University of Bristol, Bristol, United Kingdom
Joshua Larsen, University of Queensland, St Lucia, QLD, Australia
John R Nimmo, U.S. Geological Survey, National Research Program, Menlo Park, CA, United States
Thomas Reimann, Dresden University of Technology, Dresden, Germany
Invited speakers:
Brian Ebel, U.S. Geological Survey, National Research Program, Denver, CO, USA
Ilja van Meerveld, University of Zurich, Zurich, Switzerland
Fell free submitting your abstract until August 3rd here.
Structurally and temporally variable pathways exist in soil, bedrock, and at the soil-bedrock interface. Some of the factors that control saturated and unsaturated flow in variable pathways are vegetation, alteration of soils by fire, precipitation of solutes, shrinking and swelling, bedrock topography, erosion of soil pipes, growth of microorganisms, and solubility of the solid material (e.g. karst). The flow of water and transported substances through variable pathways poses hydrologic challenges that are central to major practical concerns. Cutting-edge scientific opportunities arise from the temporal evolution of these flowpaths, and their enhanced likelihood of deviation from traditional models and theory. This session solicits abstracts that provide new insights in hydrologic processes in variable flowpaths, compare those processes across varying terrains, or explore the value of new and existing concepts and methods.
Conveners:
Andreas J Hartmann, Freiburg University, Chair of Hydrology, Freiburg, Germany; University of Bristol, Bristol, United Kingdom
Joshua Larsen, University of Queensland, St Lucia, QLD, Australia
John R Nimmo, U.S. Geological Survey, National Research Program, Menlo Park, CA, United States
Thomas Reimann, Dresden University of Technology, Dresden, Germany
Invited speakers:
Brian Ebel, U.S. Geological Survey, National Research Program, Denver, CO, USA
Ilja van Meerveld, University of Zurich, Zurich, Switzerland
Fell free submitting your abstract until August 3rd here.
September 2016
Four presentations at the EUROKARST conference in Neuchatel
For the very first time visiting a conference with my PhD and MSc students and several interesting presentations:
- What is the relative impact of climate and land use changes on groundwater recharge given subsurface heterogeneity?
(together with Fanny Sarrazin and co-authors) - Improved Assessment of Drinking Water Security in a Mediterranean Karst Region - Andalusia, Spain
(together with Lara Kirn and co-authors) - A database to assess impacts of land use and climate change on Europe’s karst regions
(together with Vera Marx and Simon Brenner) - Subsurface heterogeneity at Europe’s karst regions enhances present day recharge and future climate sensitivity
(myself and co-authors)
Great discussion with many participants inclding the start of the beginning world's first karst model intercomparizon project (credits to Pierre-Yves Jeannin of the Swiss Institute of Speleology and Karstology)
Noteworthy also the amazing field trip to the Transfleuron Glacier and its Karst system (many thanks to Nico Goldscheider). Photo (from left): me and my students Fanny Sarrazin, Lara Kirn and Simon Brenner |
May 2016
Keynote lecture at the british Hydrological Society Peter Wolf Symposium 2016
Will be speaking about the present state of art and directions in karst modeling. Please find more infromation at the homepage of the Cabot Institute of the University of Bristol.
April 2016
Sessions on residence times and groundwater ages at the 2016 EGU General Assembly
At the General Hydrology Section, Andreas Hartmann, together with Paolo Benettin (EPFL, Lausanne), Agustin Brena (UNAM, Mexico City), and Tobias Schütz (University of Freiburg) will present
HS1.4 - Residence and transit times across the hydrosphere
dealing with the relationship between water storages and their residence and transit times. This session aims at combining knowledge about the characteristics and controls of water residence and transit times from recent studies and applied resource management across the entire water cycle.
At the Subsurface Hydrology Section, Andreas Hartmann, together with Daren Gooddy (BGS, UK), Scott Jasechko (University of Calgary), and Martin Kralik (Austrian Environmental Agency) will present
HS8.2.13 - Estimation and application of groundwater ages and mean residence times
This session wants to bring together experience of applied resource management and advanced research using a wide range of different techniques (tracer techniques, modelling, etc.) to estimate groundwater age-distributions in variable aquifers at various spatial scales.
Abstract submissions to the two sessions until the deadline on January 13th are cordially invited.
HS1.4 - Residence and transit times across the hydrosphere
dealing with the relationship between water storages and their residence and transit times. This session aims at combining knowledge about the characteristics and controls of water residence and transit times from recent studies and applied resource management across the entire water cycle.
At the Subsurface Hydrology Section, Andreas Hartmann, together with Daren Gooddy (BGS, UK), Scott Jasechko (University of Calgary), and Martin Kralik (Austrian Environmental Agency) will present
HS8.2.13 - Estimation and application of groundwater ages and mean residence times
This session wants to bring together experience of applied resource management and advanced research using a wide range of different techniques (tracer techniques, modelling, etc.) to estimate groundwater age-distributions in variable aquifers at various spatial scales.
Abstract submissions to the two sessions until the deadline on January 13th are cordially invited.
December 2015
Session on structurally and temporally variable pathways at the 2015 AGU Fall Meeting
Joshua Larsen (University of Queensland), John Nimmo (USGS), Thomas Reimann (TU Dresden) and I are convening an AGU session that encompasses a broad range of flow dynamics in the subsurface, both saturated and unsaturated. Structurally and temporally variable pathways (STVPs) exist in the soil, subsoil, bedrock, and at the soil-bedrock interface. Examples include flow through flowpaths evolving by the effects of soil fauna and vegetation, topographic alteration of the soil-bedrock interface, bedrock solubility (e.g. karst), soil shrinking and swelling, flow constriction from accumulation of precipitates, or time-varying water content of unsaturated media.
Having convened similar sessions since 2013, we want to go on exploring new frontiers in unsaturated/vadose/saturated zone hydrology, comparing STVPs across varying terrains, and analyzing existing methods and theory. Therefore we invite you to submit an abstract to our session at this year’s AGU fall meeting (Dec 14-18 in San Francisco, USA):
Session ID#: 7459 (H095): Saturated and Unsaturated Flow in Structurally Variable Pathways
We are happy to have Meritxell Gran (Barcelona Polytech) and Ryan Stewart (Virginia Tech) as invited speakers, both of whom are early-career scientists bringing new ideas into the field, and who represent the different domains in which STVPs exist.
Looking forward to meet you there!
Having convened similar sessions since 2013, we want to go on exploring new frontiers in unsaturated/vadose/saturated zone hydrology, comparing STVPs across varying terrains, and analyzing existing methods and theory. Therefore we invite you to submit an abstract to our session at this year’s AGU fall meeting (Dec 14-18 in San Francisco, USA):
Session ID#: 7459 (H095): Saturated and Unsaturated Flow in Structurally Variable Pathways
We are happy to have Meritxell Gran (Barcelona Polytech) and Ryan Stewart (Virginia Tech) as invited speakers, both of whom are early-career scientists bringing new ideas into the field, and who represent the different domains in which STVPs exist.
Looking forward to meet you there!