The monitoring network within this area

Hydrionis holds 34,663 values from 4 gauges within it. Discharge is a property of a gauge and its reach, not of this drainage area, so this page reports the network and its records rather than a single figure.

4

Gauges

34,663

Values held

1917–2026

Record spans

1,104 km²

Area

Gauges within the Testeboån drainage basin

4 monitoring points, positioned as the publisher records them.

How low, how high and how variable this gauge runs

A hydrograph says what happened; these say how often. Read off KONSTDALSSTRÖMMEN's whole daily record between 1979 and 2026, they describe the shape of the record rather than any day in it — and they belong to this gauge and its reach, not to this drainage area.

1.860 m³/s

Q95 low flow

7.270 m³/s

Q50 median flow

21.200 m³/s

Q10 high flow

Largest day of each water year at KONSTDALSSTRÖMMEN

The highest daily mean discharge in each October-to-September water year, 1979–2025.

These are the largest daily means, not flood peaks. A peak lasting hours is averaged across a whole day here, so the true instantaneous maximum on the same day was higher — sometimes far higher on a fast-responding catchment. Flood frequency work needs a publisher's own instantaneous series; Hydrionis holds one for 2,236 American gauges and not for this one, so the two are never drawn together. A water year the gauge did not substantially cover produces no value at all rather than a low one.

View the data behind this chart

Underlying data
Period	KONSTDALSSTRÖMMEN (m³/s)
1979	40.0
1980	98.4
1981	64.8
1982	56.8
1983	54.9
1984	115
1985	139
1986	54.5
1987	67.0
1988	42.6
1989	42.5
1990	39.1
1991	36.2
1992	48.8
1993	40.7
1994	76.6
1995	16.0
1996	32.1
1997	25.9
1998	77.9
1999	73.3
2000	77.8
2001	57.9
2002	33.5
2003	29.1
2004	34.2
2005	55.4
2006	61.8
2007	30.1
2008	51.2
2009	53.1
2010	82.0
2011	24.6
2012	70.9
2013	18.8
2014	24.0
2015	44.7
2016	26.0
2017	110
2018	36.2
2019	42.5
2020	68.4
2021	26.0
2022	86.2
2023	78.5
2024	30.4
2025	46.7

The longest record here

Mean river flow at KONSTDALSSTRÖMMEN

Annual means of the daily record, 1980–2025. One gauge, not this drainage area.

Annual means computed by Hydrionis from the published daily record, drawn only for years with at least 300 days held. They summarise this gauge's own record and say nothing about any other watercourse in this area.

View the data behind this chart

Underlying data
Period	KONSTDALSSTRÖMMEN (m³/s)
1980	10.5
1981	14.8
1982	11.3
1983	10.7
1984	12.9
1985	15.2
1986	15.2
1987	11.4
1988	9.08
1989	6.81
1990	10.6
1991	9.30
1992	9.83
1993	7.82
1994	9.34
1995	13.8
1996	6.10
1997	7.58
1998	12.6
1999	10.9
2000	17.4
2001	11.8
2002	10.1
2003	8.67
2004	7.66
2005	7.50
2006	14.3
2007	5.63
2008	10.4
2009	14.1
2010	12.0
2011	9.88
2012	12.8
2013	7.54
2014	7.99
2015	8.93
2016	8.69
2017	9.99
2018	9.96
2019	12.3
2020	9.00
2021	13.3
2022	5.68
2023	15.9
2024	10.4
2025	10.6

Every gauge Hydrionis holds within this area

Gauges within the Testeboån and what each holds
Gauge	Measures	Values	Record
KONSTDALSSTRÖMMEN	mean river flow	17,189	1979–2026
OCKELBO	mean river flow	12,719	1917–1952
SÄLJARNE	mean river flow	3,344	1950–1961
ÅBYGGEBY	mean river flow	1,411	1918–1924

How these gauges were attached to this water

Assigned by the publisher to a numbered basin Every gauge here is assigned to this drainage area by its own publisher, which issues the area an official code — 51000. A drainage area is not a river: it contains the tributaries as well as the main channel, and a gauge in it may be on any of them.

What each gauge’s link to this water rests on
Gauge	Evidence	Established
KONSTDALSSTRÖMMEN	Stated by the publisher on the record this gauge’s observations came from.	With the observations
OCKELBO	Stated by the publisher on the record this gauge’s observations came from.	With the observations
SÄLJARNE	Stated by the publisher on the record this gauge’s observations came from.	With the observations
ÅBYGGEBY	Stated by the publisher on the record this gauge’s observations came from.	With the observations

What this record holds

Hydrionis decides which waters get a page, and which of those are offered to search, from what is actually held rather than from how the page reads. Five signals are counted; this record has 3 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	4	yes, 3 or more
Years spanned	110	yes, 20 or more
Values held	34,663	yes, 1000 or more
Distinct measurements	1	no
Publishers measuring it	1	no
Official identifiers	2	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/se-smhi-2240.json
How to cite this, and who you must credit
How these figures were produced
Request this at a different scale, format or geography

No bulk download is offered here, which is a licence position rather than a product one: at least one contributing publisher does not permit redistribution. The values can be read on the page, cited, and pointed to at source.

Attribution and citation

Attribution you are required to give

These are conditions of the licences the underlying data is published under. They are obligations to the publishers, not to Hydrionis, and they apply to you directly whether or not you mention Hydrionis at all.

Data from Sveriges meteorologiska och hydrologiska institut, used under CC BY 4.0.

Sveriges meteorologiska och hydrologiska institut — CC BY 4.0 (licence text)

Suggested citation for Hydrionis

Hydrionis (2026), Testeboån gauge records, accessed 2026-10-05, hydrionis.com/waters/sweden-testeboan/

Cite Hydrionis where you rely on the compilation, the normalisation, the eligibility judgements or a chart. Where you use an unmodified published value, the publisher’s attribution is the one that is required; crediting Hydrionis as well is welcome and is not something Hydrionis can require of you.

Recommended, not required. Hydrionis does not claim rights over unmodified public data it relayed, and doing arithmetic on somebody else’s measurements does not make them Hydrionis’s. Cite the version and the access date: the Testeboån gauge records changes as publishers release and as methods are revised, and a citation without both cannot be checked later. Full guidance is on cite and reuse.

Where these figures come from

MeasuredMedium confidence2026-09-30

Source: SMHI — Swedish hydrological observations, 2240. Licence: Open — attribution required (attribution required).

Method: Daily discharge exactly as SMHI publishes it, from its corrected archive. SMHI computes the daily value from its own sub-daily measurement and rating curves; Hydrionis does not recompute it, because a mean derived from whatever sub-daily data happens to be exposed would be a different statistic under the same name.

Checked and approved by SMHI except 2026-08-14 to 2026-09-30 (not yet checked). Station in the TESTEBOÅN main drainage basin, 990 km². Discharge is a property of this gauge and this reach, not of the river as a whole.

Retrieved 1 October 2026.