Variability of Water Flow in the Hyporheic Corridor: A Case Study of the Warta Valley in Poznań Cover

Variability of Water Flow in the Hyporheic Corridor: A Case Study of the Warta Valley in Poznań

Quaestiones Geographicae

Volume 44 (2025): Issue 3 (September 2025)

By:

Monika Okońska

and Filip Wolny

Open Access

|Jul 2025

Figures & Tables

Groundwater flow directions in a river valley for a straight section of the stream: gaining stream – A, equilibrium conditions – B and losing stream – C (based on Bajkiewicz-Grabowska 2020).

Concept of the hyporheic zone and hyporheic flow in the corridor of a meandering river valley (modified scheme based on Williams (1986), Winter et al. (1998), and Alley et al. (2002).

Location of the study area (based on an orthophotomap from www.geoportal.gov.pl).

Hydrogeological cross-section through the sediments of the Warta River meander. Dashed lines indicate profiles (borehole number in parentheses) that are located near the cross-sectional line and were used to interpret the geological structure.

Water flow in the hyporheic corridor within the meander bend.

River and groundwater levels (H) in the hydrological years 2022–2024 against the background of precipitation (P).

Direction of groundwater flow in the hyporheic corridor of the Warta River during losing stream conditions – A, the transition from losing stream to gaining stream conditions – B and gaining stream conditions – C.

Direction of groundwater flow in the hyporheic corridor of the Warta River during a rise in river water levels due to precipitation.

Granulometric and hydraulic characteristics of meander sediments_

No.	Depth	Grain uniformity index U	Hydraulic conductivity k	Clay + Silt (<0.063 mm)	Sand (0.063–2 mm)			Gravel (2–63 mm)	Type*
	Depth	Grain uniformity index U	Hydraulic conductivity k	Clay + Silt (<0.063 mm)	Fine sand	Medium sand	Coarse sand	Gravel (2–63 mm)	PN-EN ISO 14688	PN-B-02480
	[m]	[–]	[m · h⁻¹]	[%]						[–]
P1
P1/4	2.2	1.78	0.81	1.5	81.1	17.0	0.4	0.0	FSa	SiSa
P1/5	3.0	2.11	0.99	1.7	58.7	27.5	12.1	0.0	FSa	FSa
P1/7	4.3	1.53	0.65	2.4	93.8	3.6	0.2	0.0	FSa	SiSa
P2
P2/2	1.6	1.64	1.91	0.4	39.9	59.3	0.4	0.0	MSa	FSa
P2/3	3.0	1.54	1.65	0.6	59.1	39.6	0.7	0.0	FSa	FSa
P2/4	3.7	2.00	5.85	0.2	8.9	83.2	7.3	0.4	MSa	MSa
P3
P3/3	2.0	2.18	1.19	1.4	47.0	43.8	7.8	0.0	FSa/MSa	FSa
P3/5	2.7	2.00	1.41	1.0	45.7	45.1	8.2	0.0	FSa/MSa	FSa
P3/8	3.4	2.00	0.99	1.6	59.1	25.6	12.8	0.9	FSa	FSa
P3/10	4.1	2.79	1.91	0.4	32.4	55.4	10.9	0.9	MSa	MSa
P3/12	4.5	2.00	3.98	0.6	14.8	76.7	7.4	0.5	MSa	MSa

Changes in the position of the water table/river water level in the study area in 2024_

Object	Distance from river	Depth to the water table		Amplitude
	Distance from river	Min	Max	Amplitude
	[m]
Warta	–	–	–	2.86
P1	400	1.96	4.43	2.47
P2	100	1.45	4.11	2.66
P3	400	1.88	4.38	2.50

DOI: https://doi.org/10.14746/quageo-2025-0030 | Journal eISSN: 2081-6383 | Journal ISSN: 2082-2103

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Language: English

Page range: 63 - 75

Submitted on: Feb 6, 2025

Published on: Jul 25, 2025

Published by: Adam Mickiewicz University

In partnership with: Paradigm Publishing Services

Publication frequency: 4 times per year

Keywords:

hyporheic zone,

gaining stream,

Related subjects:

© 2025 Monika Okońska, Filip Wolny, published by Adam Mickiewicz University
This work is licensed under the Creative Commons Attribution 4.0 License.

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