The monitoring network within this area

Hydrionis holds 44,150 values from 3 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.

3

Gauges

44,150

Values held

1922–2026

Record spans

1,324 km²

Area

Gauges within the Åbyälven drainage basin

3 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 LILLÄNGET's whole daily record between 1980 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.

3.100 m³/s

Q95 low flow

8.680 m³/s

Q50 median flow

39.000 m³/s

Q10 high flow

Largest day of each water year at LILLÄNGET

The highest daily mean discharge in each October-to-September water year, 1980–2025.

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	LILLÄNGET (m³/s)
1980	135
1981	114
1982	114
1983	114
1984	162
1985	162
1986	117
1987	133
1988	130
1989	133
1990	63.0
1991	100
1992	151
1993	128
1994	132
1995	30.9
1996	167
1997	178
1998	103
1999	117
2000	132
2001	123
2002	45.0
2003	104
2004	74.6
2005	83.2
2006	80.7
2007	175
2008	144
2009	127
2010	167
2011	185
2012	236
2013	78.2
2014	129
2015	120
2016	136
2017	185
2018	127
2019	79.2
2020	139
2021	87.4
2022	119
2023	165
2024	115
2025	73.7

The longest record here

Mean river flow at LILLÄNGET

Annual means of the daily record, 1981–2025. 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	LILLÄNGET (m³/s)
1981	15.0
1982	13.0
1983	13.8
1984	14.1
1985	18.1
1986	13.7
1987	24.8
1988	18.2
1989	13.7
1990	14.6
1991	14.6
1992	14.8
1993	16.4
1994	13.8
1995	13.8
1996	10.5
1997	16.1
1998	25.3
1999	15.1
2000	22.1
2001	20.6
2002	11.4
2003	7.65
2004	15.8
2005	16.7
2006	12.1
2007	19.1
2008	19.0
2009	14.1
2010	14.6
2011	17.3
2012	29.2
2013	15.8
2014	13.4
2015	21.5
2016	15.5
2017	18.6
2018	14.5
2019	14.6
2020	23.6
2021	21.6
2022	14.5
2023	18.5
2024	18.8
2025	14.2

Every gauge Hydrionis holds within this area

Gauges within the Åbyälven and what each holds
Gauge	Measures	Values	Record
LILLÄNGET	mean river flow	16,938	1980–2026
BJÖRKLIDEN 2	mean river flow	13,879	1962–1999
BJÖRKLIDEN	mean river flow	13,333	1922–1958

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 — 17000. 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
LILLÄNGET	Stated by the publisher on the record this gauge’s observations came from.	With the observations
BJÖRKLIDEN 2	Stated by the publisher on the record this gauge’s observations came from.	With the observations
BJÖRKLIDEN	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	3	yes, 3 or more
Years spanned	105	yes, 20 or more
Values held	44,150	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-2283.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), Åbyälven gauge records, accessed 2026-10-05, hydrionis.com/waters/sweden-abyalven/

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 Åbyälven 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, 2283. 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 2026-05-18 to 2026-09-30 (not yet checked). Station in the ÅBYÄLVEN main drainage basin, 1,324 km². Discharge is a property of this gauge and this reach, not of the river as a whole.

Retrieved 1 October 2026.