Details
| Original language | English |
|---|---|
| Pages (from-to) | 2474-2489 |
| Number of pages | 16 |
| Journal | Water resources research |
| Volume | 52 |
| Issue number | 4 |
| Early online date | 14 Mar 2016 |
| Publication status | Published - 1 Apr 2016 |
Abstract
A numerical benchmark for 2-D variable-density flow and solute transport in a freshwater lens is presented. The benchmark is based on results of laboratory experiments conducted by Stoeckl and Houben (2012) using a sand tank on the meter scale. This benchmark describes the formation and degradation of a freshwater lens over time as it can be found under real-world islands. An error analysis gave the appropriate spatial and temporal discretization of 1 mm and 8.64 s, respectively. The calibrated parameter set was obtained using the parameter estimation tool PEST. Comparing density-coupled and density-uncoupled results showed that the freshwater-saltwater interface position is strongly dependent on density differences. A benchmark that adequately represents saltwater intrusion and that includes realistic features of coastal aquifers or freshwater lenses was lacking. This new benchmark was thus developed and is demonstrated to be suitable to test variable-density groundwater models applied to saltwater intrusion investigations.
Keywords
- freshwater lens, numerical benchmark, saltwater intrusion, solute transport, variable-density flow
ASJC Scopus subject areas
- Environmental Science(all)
- Water Science and Technology
Sustainable Development Goals
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Water resources research, Vol. 52, No. 4, 01.04.2016, p. 2474-2489.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A new numerical benchmark of a freshwater lens
AU - Stoeckl, L.
AU - Walther, M.
AU - Graf, T.
N1 - Publisher Copyright: © 2016. American Geophysical Union. All Rights Reserved.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - A numerical benchmark for 2-D variable-density flow and solute transport in a freshwater lens is presented. The benchmark is based on results of laboratory experiments conducted by Stoeckl and Houben (2012) using a sand tank on the meter scale. This benchmark describes the formation and degradation of a freshwater lens over time as it can be found under real-world islands. An error analysis gave the appropriate spatial and temporal discretization of 1 mm and 8.64 s, respectively. The calibrated parameter set was obtained using the parameter estimation tool PEST. Comparing density-coupled and density-uncoupled results showed that the freshwater-saltwater interface position is strongly dependent on density differences. A benchmark that adequately represents saltwater intrusion and that includes realistic features of coastal aquifers or freshwater lenses was lacking. This new benchmark was thus developed and is demonstrated to be suitable to test variable-density groundwater models applied to saltwater intrusion investigations.
AB - A numerical benchmark for 2-D variable-density flow and solute transport in a freshwater lens is presented. The benchmark is based on results of laboratory experiments conducted by Stoeckl and Houben (2012) using a sand tank on the meter scale. This benchmark describes the formation and degradation of a freshwater lens over time as it can be found under real-world islands. An error analysis gave the appropriate spatial and temporal discretization of 1 mm and 8.64 s, respectively. The calibrated parameter set was obtained using the parameter estimation tool PEST. Comparing density-coupled and density-uncoupled results showed that the freshwater-saltwater interface position is strongly dependent on density differences. A benchmark that adequately represents saltwater intrusion and that includes realistic features of coastal aquifers or freshwater lenses was lacking. This new benchmark was thus developed and is demonstrated to be suitable to test variable-density groundwater models applied to saltwater intrusion investigations.
KW - freshwater lens
KW - numerical benchmark
KW - saltwater intrusion
KW - solute transport
KW - variable-density flow
UR - http://www.scopus.com/inward/record.url?scp=84979493768&partnerID=8YFLogxK
U2 - 10.1002/2015WR017989
DO - 10.1002/2015WR017989
M3 - Article
AN - SCOPUS:84979493768
VL - 52
SP - 2474
EP - 2489
JO - Water resources research
JF - Water resources research
SN - 0043-1397
IS - 4
ER -