Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1002/2015WR017989
Title (Primary) A new numerical benchmark of a freshwater lens
Author Stoeckl, L.; Walther, M.; Graf, T.
Journal Water Resources Research
Year 2016
Department ENVINF
Volume 52
Issue 4
Page From 2474
Page To 2489
Language englisch
UFZ wide themes RU5;
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.
Persistent UFZ Identifier
Stoeckl, L., Walther, M., Graf, T. (2016):
A new numerical benchmark of a freshwater lens
Water Resour. Res. 52 (4), 2474 - 2489