INTRAVAL Phase 2: Investigations into the influence of the density stratification on groundwater flow by the example of pumping test 'Weisses Moor'
Description
After a short description of the pumping test the determination of the aquifer parameters permeability k, storage coefficient S and aquifer thickness b is described on the basis of the analytical THEIS-solution for the calculation of the drawdown of a well. The numerical computations with the computer codes SUTRA and ROCKFLOW based on this are described. The computations have led to the result that the drawdown values observed in the pumping test can be described with the assumptions based on the THEIS-solution. The computations considering the density stratification do not show significant differences compared to the freshwater computations. The influence of the arrangement of filter areas in the well or the distribution of the pumped water along that filter areas is greater than the influence of the computation as freshwater or salt-water model. However, the difference between the observed density of the pumped water and the computed density is in the range of 20 to 50% depending on the model variant. It can be concluded that the flow conditions for this pumping test cannot be validated with the simple approaches and models used. (orig.)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Die Berechnungen fuehren zu dem Ergebnis, dass sich die im Pumpversuch 'weisses Moor' beobachteten Absenkungen mit den der THEIS-Loesung zugrunde liegenden Annahmen beschreiben lassen. Die Berechnungen unter Beruecksichtigung der Dichteschichtung zeigen keine signifikanten Unterschiede zu den Suesswasserrechnungen. Der Einfluss der Anordnung der Filterbereiche des Brunnens ist groesser als der Einfluss der Berechnung als Suesswasser- oder Salzwassermodell. Jedoch liegt die Abweichung zwischen beobachteter Dichte des gepumpten Wassers und berechneter Dichte je nach betrachteter Modellvariante in der Groessenordnung von 20 bis 50%. Aus den durchgefuehrten Berechnungen kann schlussgefolgert werden, dass eine Validierung der Stroemungsverhaeltnisse fuer diesen Pumpversuch mit den hier verwendeten einfachen Ansaetzen und Modellen nicht moeglich ist. (orig.)
Files
Restricted
The record is publicly accessible, but files are restricted to users with access.
Additional details
Publishing Information
- Imprint Pagination
- 80 p.
- Report number
- BfS-ET--16/92
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 24030577
- Subject category
- S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
- Descriptors DEI
- AQUIFERS; COMPUTERIZED SIMULATION; DENSITY; FLOW RATE; GORLEBEN SALT DOME; GROUND WATER; NUMERICAL SOLUTION; SALT DEPOSITS; STRATIFICATION; VERIFICATION
- Descriptors DEC
- GEOLOGIC DEPOSITS; HYDROGEN COMPOUNDS; NUCLEAR FACILITIES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RADIOACTIVE WASTE FACILITIES; SIMULATION; WATER