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GroMoPo Metadata for Borkum Island model
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Created: Feb 08, 2023 at 4:51 p.m.
Last updated: Feb 08, 2023 at 4:51 p.m.
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Abstract

A numerical, density dependent groundwater model is set up for the North Sea Island of Borkum to estimate climate change impacts on coastal aquifers and especially the situation of barrier islands in the Wadden Sea. The database includes information from boreholes, a seismic survey, a helicopter-borne electromagnetic (HEM) survey, monitoring of the freshwater-saltwater boundary by vertical electrode chains in two boreholes, measurements of groundwater table, pumping and slug tests, as well as water samples. Based on a statistical analysis of borehole columns, seismic sections and HEM, a hydrogeological model is set up. The groundwater model is developed using the finite-element programme FEFLOW. The density dependent groundwater model is calibrated on the basis of hydraulic, hydrological and geophysical data, in particular spatial HEM and local monitoring data. Verification runs with the calibrated model show good agreement between measured and computed hydraulic heads. A good agreement is also obtained between measured and computed density or total dissolved solids data for both the entire freshwater lens on a large scale and in the area of the well fields on a small scale. For simulating future changes in this coastal groundwater system until the end of the current century, we use the climate scenario A2, specified by the Intergovernmental Panel on Climate Change and, in particular, the data for the German North Sea coast. Simulation runs show proceeding salinisation with time beneath the well fields of the two waterworks Waterdelle and Ostland. The modelling study shows that the spreading of well fields is an appropriate protection measure against excessive salinisation of the water supply until the end of the current century.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Germany
North Latitude
53.6220°
East Longitude
6.8374°
South Latitude
53.5559°
West Longitude
6.6242°

Content

Additional Metadata

Name Value
DOI 10.5194/hess-16-3621-2012
Depth
Scale 11 - 101 km²
Layers 39
Purpose Groundwater contamination;Climate change
GroMoPo_ID 369
IsVerified True
Model Code Feflow
Model Link https://doi.org/10.5194/hess-16-3621-2012
Model Time 2010-2100
Model Year 2012
Model Authors Sulzbacher, H; Wiederhold, H; Siemon, B; Grinat, M; Igel, J; Burschil, T; Gunther, T; Hinsby, K
Model Country Germany
Data Available Report/paper only
Developer Email hans.sulzbacher@liag-hannover.de
Dominant Geology Model focuses on multiple geologic materials
Developer Country Germany; Denmark
Publication Title Numerical modelling of climate change impacts on freshwater lenses on the North Sea Island of Borkum using hydrological and geophysical methods
Original Developer No
Additional Information
Integration or Coupling Solute transport
Evaluation or Calibration Hydraulic heads, hydraulic conductivities from pumping and slug tests, recharge data, runoff measurements of open water system
Geologic Data Availability No

How to Cite

GroMoPo, D. Kretschmer (2023). GroMoPo Metadata for Borkum Island model, HydroShare, http://www.hydroshare.org/resource/413e6e8a501146e9a84193e5984cf981

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
CC-BY

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