Groundwater seepage causes surface runoff and erosion during snowmelt in a tile-drained agricultural catchment: Field observations and modelling analysis

Joris C. Stuurop*, Sjoerd E.A.T.M. van der Zee, Thomas K. Thiis, Helen K. French

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

A significant overland flow and erosion event was documented and studied in an agricultural area with postglacial marine sediments (southern Norway). Field observations and UAV-photography revealed that a large volume of water abruptly exfiltrated at the end of the snowmelt season. Numerical groundwater modelling aided in interpreting our observations, as well as comparison with prior study in the same catchment. It was hypothesized that a water storage capacity threshold of the subsurface was exceeded to cause the seepage, in combination with a transition from coarse to fine marine sediments. Furthermore, the spatial distribution of snow cover and snow melt rate, as well as the presence of manmade tile drainage, were found to have significant impact on the seepage event. The recurrence frequency of the event is unknown, warranting further study.

Original languageEnglish
Article number106680
JournalCatena
Volume220
Issue numberPart A
DOIs
Publication statusPublished - Jan 2023

Keywords

  • Erosion
  • Groundwater seepage
  • Hydrology
  • Snowmelt

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