Abstract
Detailed field measurements of water table levels and river stages operated on the Alzette river basin in Luxembourg have pointed out that the runoff response of the catchment due to rainfall is strongly dependent on the groundwater level behaviour and consequently on the water storage of the catchment. This is due to the soil structure and geology of the area, which allow the formation of fast preferential flow that quickly reaches the aquifer and rapidly increases the near-stream saturated area.
In order to simulate such situation an integrated approach that allows the simulation
of coupled groundwater and surface water flows is necessary; for this purpose the
‘Representative ElementaryWatershed’ (REW) model is selected. The model considers the total watershed area as subdivided in a number of sub-watersheds according to the Strahler stream order system. Each sub-watershed is considered as a spatial
unit, and is divided in various zones according to the different physical processes observed. Only averaged quantities are considered within each zone, and mass exchange processes are evaluated between the various zones and the various sub-watersheds. In particular the mass exchange between the saturated zone and the channel reaches is simulated, allowing an interaction between groundwater and surface water. Calibration of the model is performed by means of piezographic measures as well as channel flow data available from the Centre de Recherche Public Gabriel Lippmann (CRP-GL) of Luxembourg.
In order to simulate such situation an integrated approach that allows the simulation
of coupled groundwater and surface water flows is necessary; for this purpose the
‘Representative ElementaryWatershed’ (REW) model is selected. The model considers the total watershed area as subdivided in a number of sub-watersheds according to the Strahler stream order system. Each sub-watershed is considered as a spatial
unit, and is divided in various zones according to the different physical processes observed. Only averaged quantities are considered within each zone, and mass exchange processes are evaluated between the various zones and the various sub-watersheds. In particular the mass exchange between the saturated zone and the channel reaches is simulated, allowing an interaction between groundwater and surface water. Calibration of the model is performed by means of piezographic measures as well as channel flow data available from the Centre de Recherche Public Gabriel Lippmann (CRP-GL) of Luxembourg.
Original language | English |
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Title of host publication | NCR-days 2003 |
Subtitle of host publication | Dealing with Floods within Constraints, November 6 – 8 |
Editors | N.S.M. Douben, A.G. van Os |
Place of Publication | Delft, The Netherlands |
Publisher | NCR |
Pages | 12-14 |
Publication status | Published - 2003 |
Event | NCR-days 2003: Dealing with Floods within Constraints - Resort Marina Oolderhuuske, Roermond, Netherlands Duration: 6 Nov 2003 → 8 Nov 2003 |
Publication series
Name | NCR publication |
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Publisher | Netherlands Centre for River Studies |
Volume | 24-2004 |
ISSN (Print) | 1568-234X |
Conference
Conference | NCR-days 2003 |
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Country/Territory | Netherlands |
City | Roermond |
Period | 6/11/03 → 8/11/03 |
Keywords
- ADLIB-ART-1085
- WRS