Connectivity Research at GFZ Potsdam (Hydrology...
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www.gfz-potsdam.de Connectivity Research at GFZ Potsdam (Hydrology Section) Connectivity of overland flow and sediment Lisa Angermann, Theresa Blume, Andreas Güntner, Sibylle Hassler, Philip Müller, Simon Plate, Erik Sommerer, Christina Tecklenburg, Henriette Wilcke. Contact: [email protected] Hillslope connectivity Regional-scale modelling of connectivity of water and sediment fluxes Groundwater – surface water connectivity References WASA-SED model (Model of Water Availability in Semi-Arid Areas) Semi-distributed modelling of water and sediment fluxes at the basin scale Sub-grid representation of redistribution / connectivity processes at the hillslope scale between different topographic and land cover units (e.g., re-infiltration of surface runoff) Sediment transport in the river system and deposition in reservoirs References: Medeiros et al. (2010), Mueller et al. (2010), Güntner & Bronstert (2004) Andreas Güntner, Erik Sommerer Güntner & Bronstert (2004): Representation of landscape variability and lateral redistribution processes for large-scale hydrological modelling in semi-arid areas. Journal of Hydrology, 297(1-4), 136-161. Medeiros et al. (2010): Modelling spatio-temporal patterns of sediment yield and connectivity in a semi-arid catchment with the WASA-SED model. Hydrological Sciences Journal, 55(4). Mueller et al. (2010): Modelling water availability, sediment export and reservoir sedimentation in drylands with the WASA-SED model. Geoscientific Model Development, 3, 275-291. Müller et al. (2013): A Buoy for Continuous Monitoring of Suspended Sediment Dynamics. Sensors 13(10), doi:13.3990/s131013779 Lisa Angermann, Theresa Blume Overland flow connectivity in three tropical catchments Sibylle Hassler 3 catchments in Panama Monitoring with presence-absence overland flow detectors (OFDs) Sampling on plots and in flowlines Connectivity of flowlines and between plots and flowlines Influence of vegetation and spatial patterns of saturated hydraulic conductivity OFD plot flowline Connectivity of sediment transport from headwaters to lacustrine sediment deposits Philip Müller, Andreas Güntner Study area: Lake Mondsee / Austria Monitoring of runoff and suspended sediment concentrations from headwater channels to the lake Lake buoy system for monitoring of temperature, current and turbidity in different water depths Lacustrine sediments as long-term flood archives Reference: Müller et al. (2013) Suspended sediment concentration Study area Lake monitoring buoy Connectivity between groundwater and Lake Hinnensee Christina Tecklenburg, Henriette Wilcke, Theresa Blume Connectivity between groundwater and streams Lisa Angermann, Theresa Blume Sprinkling experiment on a hillslope Measurement of soil moisture profiles, stable isotopes, surface runoff and ground-penetrating radar Conceptual understanding of hillslope runoff generation Connectivity of overland-flow and sediment transport Erik Sommerer, Simon Plate, Andreas Güntner Study area: badland in northeastern Spain Aim: Identification of erosion patterns and rates and their connection to the channel network Method: tracking water and sediment transport with RFID tags Tags distributed on different morphological units (hillslopes, first-order channels) and different land covers Connectivity between stream and catchment: Methods: Radon sampling in surface water, groundwater, springs, lateral inflow Salt dilution measurements along stream Distinction between Young water: short residence time, direct flow paths, no groundwater mixing Old water: long residence time, groundwater, baseflow Groundwater inflow into stream: Method: fiber-optic distributed temperature sensing (DTS) Very localized hotspots of groundwater-stream connectivity Patterns stable in time Methods: temperature and Radon as tracer A) fiber-optic distributed temperature sensing (DTS) and Radon measurements for determining off-shore lacustrine groundwater discharge (LGD) B) temperature profiles to map groundwater-lake exchange along lakeshore Results: A) LGD is dominating process along the shoreline, with maxima in north B) local hotspots of off-shore LGD; but generally minor role of off-shore LGD A B Significant lateral flow in certain layers Interaction between matrix and preferential flow paths Remobilisation of matrix water No significant surface runoff Summer Winter sediment 8–12 mm RFID tag RFID detector
Transcript of Connectivity Research at GFZ Potsdam (Hydrology...
www.gfz-potsdam.de
Connectivity Research at GFZ Potsdam (Hydrology Section)
Connectivity of overland flow and sediment
Lisa Angermann, Theresa Blume, Andreas Güntner, Sibylle Hassler, Philip Müller, Simon Plate, Erik Sommerer, Christina Tecklenburg, Henriette Wilcke. Contact: [email protected]
Hillslope connectivity Regional-scale modelling of connectivity of water and sediment fluxes
Groundwater – surface water connectivity
References
WASA-SED model (Model of Water Availability in Semi-Arid Areas)
Semi-distributed modelling of water and sediment fluxes at the basin scale
Sub-grid representation of redistribution / connectivity processes at the hillslope scale between different topographic and land cover units (e.g., re-infiltration of surface runoff)
Sediment transport in the river system and deposition in reservoirs
References: Medeiros et al. (2010), Mueller et al. (2010), Güntner & Bronstert (2004)
Andreas Güntner, Erik Sommerer
Güntner & Bronstert (2004): Representation of landscape variability and lateral redistribution processes for large-scale hydrological modelling in semi-arid areas. Journal of Hydrology, 297(1-4), 136-161. Medeiros et al. (2010): Modelling spatio-temporal patterns of sediment yield and connectivity in a semi-arid catchment with the WASA-SED model. Hydrological Sciences Journal, 55(4). Mueller et al. (2010): Modelling water availability, sediment export and reservoir sedimentation in drylands with the WASA-SED model. Geoscientific Model Development, 3, 275-291. Müller et al. (2013): A Buoy for Continuous Monitoring of Suspended Sediment Dynamics. Sensors 13(10), doi:13.3990/s131013779
Lisa Angermann, Theresa Blume
Overland flow connectivity in three tropical catchments Sibylle Hassler 3 catchments in Panama Monitoring with presence-absence overland flow
detectors (OFDs) Sampling on plots and in flowlines Connectivity of flowlines and between plots and
flowlines Influence of vegetation and spatial patterns of
saturated hydraulic conductivity
OFD plot flowline
Connectivity of sediment transport from headwaters to lacustrine sediment deposits Philip Müller, Andreas Güntner Study area: Lake Mondsee / Austria Monitoring of runoff and suspended sediment
concentrations from headwater channels to the lake Lake buoy system for monitoring of temperature,
current and turbidity in different water depths Lacustrine sediments as long-term flood archives Reference: Müller et al. (2013)
Susp
ende
d se
dim
ent c
once
ntra
tion
Study area
Lake monitoring buoy
Connectivity between groundwater and Lake Hinnensee Christina Tecklenburg, Henriette Wilcke, Theresa Blume
Connectivity between groundwater and streams Lisa Angermann, Theresa Blume
Sprinkling experiment on a hillslope Measurement of soil moisture profiles, stable
isotopes, surface runoff and ground-penetrating radar
Conceptual understanding of hillslope runoff generation
Connectivity of overland-flow and sediment transport Erik Sommerer, Simon Plate, Andreas Güntner Study area: badland in northeastern Spain Aim: Identification of erosion patterns and rates
and their connection to the channel network Method: tracking water and sediment transport
with RFID tags Tags distributed on different morphological units
(hillslopes, first-order channels) and different land covers
Connectivity between stream and catchment: Methods: Radon sampling in surface
water, groundwater, springs, lateral inflow
Salt dilution measurements along stream
Distinction between Young water: short residence
time, direct flow paths, no groundwater mixing
Old water: long residence time, groundwater, baseflow
Groundwater inflow into stream: Method: fiber-optic distributed
temperature sensing (DTS) Very localized hotspots of
groundwater-stream connectivity Patterns stable in time
Methods: temperature and Radon as tracer A) fiber-optic distributed temperature sensing (DTS) and Radon measurements for
determining off-shore lacustrine groundwater discharge (LGD) B) temperature profiles to map groundwater-lake exchange along lakeshore
Results: A) LGD is dominating process along the shoreline, with maxima in north B) local hotspots of off-shore LGD; but generally minor role of off-shore LGD
A B
Significant lateral flow in certain layers Interaction between matrix and
preferential flow paths Remobilisation of matrix water No significant surface runoff
Summer Winter
sediment
8–12 mm
RFID tag
RFID detector
