Comparison of abstraction scenarios simulated by SWAT and SWAT-MODFLOW

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

In hydrological modelling of catchments, wherein streams are groundwater-fed, an accurate representation of groundwater processes and their interaction with surface water is crucial. With this purpose, a coupled model was recently developed linking SWAT (Soil and Water Assessment Tool) with the fully-distributed groundwater model MODFLOW (Modular Groundwater Flow). In this study, SWAT and SWAT-MODFLOW were applied to a Danish groundwater-dominant catchment, simulating groundwater abstraction scenarios and assessing the benefits and drawbacks of SWAT-MODFLOW. Both models demonstrated good performance. However, SWAT-MODFLOW provided more realistic outputs when simulating abstraction: the decrease in streamflow was similar to the volume of water abstracted, while in SWAT the impact was negligible. SWAT also showed impacts on streamflow only when abstractions were taken from the shallow aquifer, not from the deep aquifer. Overall, SWAT-MODFLOW demonstrated wider possibilities for groundwater analysis, providing more insights than SWAT in supporting decision making in relation to environmental assessment.

Original languageEnglish
JournalHydrological Sciences Journal
Volume64
Issue4
Pages (from-to)434-454
Number of pages21
ISSN0262-6667
DOIs
Publication statusPublished - 1 Apr 2019

    Research areas

  • abstraction, catchment, groundwater, hydrology, modelling, SWAT-MODLFOW, CALIBRATION, CLIMATE-CHANGE, GRAPHICAL USER-INTERFACE, CHANGE IMPACTS, MODEL, FLOW, LAND-USE CHANGE, SOIL, WATER ASSESSMENT-TOOL, LOADS

See relations at Aarhus University Citationformats

ID: 149411461