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Representation of Bi-Directional Fluxes Between Groundwater and Surface Water in a Bucket-Type Hydrological Model

Staudinger, M. and Seibert, Jan and van Meerveld, H. J. (2021). Representation of Bi-Directional Fluxes Between Groundwater and Surface Water in a Bucket-Type Hydrological Model. Water Resources Research. 57 , e2020WR028835
[Research article]

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Abstract

In most bucket-type hydrological models, water can only flow from the groundwater to the stream and the flux is based on the groundwater storage. However, many catchments have losing stream sections, where streamflow recharges the groundwater. We developed a formulation to represent groundwater recharge by streamwater in a bucket-type model and tested this formulation for the Panola Mountain Research Watershed to demonstrate its function and assess its performance. The upper reach of the Panola catchment is often dry and highly affected by flow from a bedrock outcrop; further downstream the stream is perennial. We simulated streamflow with the fully lumped version of a bucket-type model and compared it to (a) a variant with sub-catchments to more realistically represent the low storage and quick response from the bedrock outcrop and (b) a variant that also includes the bi-directional exchange between the groundwater and the stream. For all three model variants, we compared simulated and observed streamflow and groundwater dynamics. Although the gain in overall model performance by including the bi-directional exchange between the groundwater and the stream was small, the explicit representation of this exchange led to better streamflow simulations during drying-down and wetting-up periods. For Panola the fluxes along the stream appeared less important than subsurface drainage from the upper sub-catchment to the downstream sub-catchment. We recommend considering the bi-directional fluxes between groundwater and the stream in bucket-type hydrological models where these processes are important, and the focus of the simulations is on low flow conditions.

Authors/Creators:Staudinger, M. and Seibert, Jan and van Meerveld, H. J.
Title:Representation of Bi-Directional Fluxes Between Groundwater and Surface Water in a Bucket-Type Hydrological Model
Series Name/Journal:Water Resources Research
Year of publishing :2021
Volume:57
Article number:e2020WR028835
Number of Pages:23
Publisher:AMER GEOPHYSICAL UNION
ISSN:0043-1397
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
Keywords:groundwater-surface water exchange, Panola mountain Research Watershed, HBV-model
URN:NBN:urn:nbn:se:slu:epsilon-p-114264
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114264
Additional ID:
Type of IDID
DOI10.1029/2020WR028835
Web of Science (WoS)000703704400050
ID Code:26082
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:09 Nov 2021 15:25
Metadata Last Modified:09 Nov 2021 15:31

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