1. Implications of past glaciation on todays’s landscape-functioning in the province Drenthe, the Netherlands
Drs E.P.H. Bregman, Province of Drenthe
Utrecht University
The glaciation history of North Netherlands has influenced its landscape functioning till today.Therefore, in its variuos aspects, it is considered important information for nature- and landscape management planning and sustainable exploitation of groundwater. Drenthe has brook valleys in a glacial-inherited landscape, sculptured in the Saalian Drenthe substage (within MIS 6), in complex interaction with the overridden Quatenary substrate, with deep Elsterian subglacial channels, overlaying active domes of Zechstein salt and part of the Ice Marginal Landscape(IML) of NW Europe. Clusters of helofyte plants in modern brooks reveal the local surfacing of deep groundwater (GWF) flow. A pilot study tried to relate eco-geohydrological to paleoglacio-logical questions, integrating both fields. ?
approach
results
- Correlation exist with tectonic blocks and saltdome crests, indicating postglacial activity, but importantly also syn-glacial activity
Undeep GWF correlates with positioning of helofytes and deep seepage areas (> Pw; >T)
- DDC is “engine” of GWF and undeep GWF
FIELDWORK VEGETATION / HYDROL.
CONCEPTUAL MODEL
MODELING
1988; 2005
MANAGEMENT PLAN I
LANDSCAPE- AND NATURE MANAGEMENT PLAN
NP Drentsche Aa
SIMGRTO
MONITOR
GEOLOGY/GLACIOLOGY/
GEO-HYDROLOGY
SPATIAL ANALYSE
MANAGEMENT PLAN II
IMOD. / NEBG-FEFLOW
FIELDWORK
Ph-D study
PALEO-RECONSTRUCTION
GLACIAL MODEL
T GROUNDWATER
UPDOMING
A PREPATORY STUDY SHOWED A CORRELATION BETWEEN DEEP ELSTERIAN GLACIAL CHANNELS, POSITIONNING OF FAULTS, SALTDOMES AND VEGETATION.
TESTED CORRELATIONS:
TOPDOWN BY MODELING FLUXES OF GROUNDWATERSYSTEMS UP TO 200 M-S.L. WITH:
IMOD /MIPWA/GIS MODEL
BOTOM UP BY MODELING DEEP GROUNDWATERFLOW, DRIVEN BY DOUBLE DIFFUSE CONVECTION, TOP ZECHSTEIN, WITH:
NBEL/FEFLOW MODEL
- SENSITIVITY AND STRESS ANALYSES TO GET MORE INSIGHT IN IMPACT OF GROUNDWATER-EXTRACTION AND UNDERGROUND THERMAL ENERGY STORAGE (UTES)
B NBEG/FEFLOW
conclusions
Part of the rock indicates “hard-rock “anhydrite, rather than “plastic” halite. This is importance for understanding glacio-isostacy in IML
Today and under last of ice Thermohaline GWFis important notion, with strongest effect in subarea with Elsterian buried subglacial channels. Too for paleo-reconstruction of icestreams
profile
RESULTS
HELOFYTES
RELATION ELSTERIAN GLACIAL CHANNELS AND VEGETATION
follow up
Newly knowledge improves actual nature and landscape-management systems, because of better insight in deep GWF and sources.
Stress analyses confirmed high sensability for human acivities in Buried Valleys, which are immense fresh drinking water reservoirs for millions of people in In NW Europe. These reservoirs are threatened by salinisation, groundwater-extraction and UTES systems.
Therefore this item is political issue in the EU ENCORE conference in Drenthe Province, the Netherlands
top 550-mv
Saltdome Anloo NE SW
NESTED HYDROLOGICAL SYSTEMS
A IMOD /MIPWA/GIS
B NBEG/FEFLOW
C NBEG/FEFLOW
This study is result of (international) coöperation with Free University of Berlin: dr. F.Magri; and dr. K.M.Cohen, Utrecht University and J.Hof, E.Dijk, M. van Vulpen, M.Siemonsma (province of Drenthe) and A.Klootwijk, Wgeningen University.of Applied Sciences.

2. Implications of past glaciation on todays’s landscape-functioning in the province Drenthe, the Netherlands
Drs E.P.H. Bregman, Province of Drenthe
Utrecht University
The glaciation history of North Netherlands has influenced its landscape functioning till today.Therefore, in its variuos aspects, it is considered important information for nature- and landscape management planning and sustainable exploitation of groundwater. Drenthe has brook valleys in a glacial-inherited landscape, sculptured in the Saalian Drenthe substage (within MIS 6), in complex interaction with the overridden Quatenary substrate, with deep Elsterian subglacial channels, overlaying active domes of Zechstein salt and part of the Ice Marginal Landscape(IML) of NW Europe. Clusters of helofyte plants in modern brooks reveal the local surfacing of deep groundwater (GWF) flow. A pilot study tried to relate eco-geohydrological to paleoglacio-logical questions, integrating both fields. ?
METHODS
RESULTS
- Correlation exist with tectonic blocks and saltdome crests, indicating postglacial activity, but importantly also syn-glacial activity
Undeep GWF correlates with positioning of helofytes and deep seepage areas (> Pw; >T)
- DDC is “engine” of GWF and undeep GWF
FIELDWORK VEGETATION / HYDROL.
CONCEPTUAL MODEL
MODELING
1988; 2005
MANAGEMENT PLAN I
LANDSCAPE- AND NATURE MANAGEMENT PLAN
NP Drentsche Aa
SIMGRTO
MONITOR
GEOLOGY/GLACIOLOGY/
GEO-HYDROLOGY
SPATIAL ANALYSE
MANAGEMENT PLAN II
IMOD. / NEBG-FEFLOW
FIELDWORK
Ph-D study
PALEO-RECONSTRUCTION
GLACIAL MODEL
T GROUNDWATER
UPDOMING
A PREPATORY STUDY SHOWED A CORRELATION BETWEEN DEEP ELSTERIAN GLACIAL CHANNELS, POSITIONNING OF FAULTS, SALTDOMES AND VEGETATION.
TESTED CORRELATIONS:
TOPDOWN BY MODELING FLUXES OF GROUNDWATERSYSTEMS UP TO 200 M-S.L. WITH:
IMOD /MIPWA/GIS MODEL
BOTTOM UP BY MODELING DEEP GROUNDWATERFLOW, DRIVEN BY DOUBLE DIFFUSE CONVECTION, TOP ZECHSTEIN, WITH:
NBEL/FEFLOW MODEL
- SENSITIVITY AND STRESS ANALYSES TO GET MORE INSIGHT IN IMPACT OF GROUNDWATER-EXTRACTION AND UNDERGROUND THERMAL ENERGY STORAGE (UTES)
B NBEG/FEFLOW
CONCLUSIONS
Part of the rock indicates “hard-rock “anhydrite, rather than “plastic” halite. This is importance for understanding glacio-isostacy in IML
Today and under last of ice Thermohaline GWFis important notion, with strongest effect in subarea with Elsterian buried subglacial channels. Too for paleo-reconstruction of icestreams
profile
FOLLOW UP
RESULTS
HELOFYTES
RELATION ELSTERIAN GLACIAL CHANNELS AND VEGETATION
Newly knowledge improves actual nature and landscape-management systems, because of better insight in deep GWF and sources.
Stress analyses confirmed high sensability for human acivities in Buried Valleys, which are immense fresh drinking water reservoirs for millions of people in In NW Europe. These reservoirs are threatened by salinisation, groundwater-extraction and UTES systems.
Therefore this item is political issue in the EU ENCORE conference in Drenthe Province, the Netherlands
top 550-mv
Saltdome Anloo NE SW
NESTED HYDROLOGICAL SYSTEMS
A IMOD /MIPWA/GIS
B NBEG/FEFLOW
C NBEG/FEFLOW
This study is result of (international) coöperation with Free University of Berlin: dr. F.Magri; and dr. K.M.Cohen, Utrecht University and J.Hof, E.Dijk, M. van Vulpen, M.Siemonsma (province of Drenthe) and A.Klootwijk, Wgeningen University.of Applied Sciences.