The monitoring network within this area

Hydrionis holds 34,293 values from 5 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.

5

Gauges

34,293

Values held

1933–2026

Record spans

319 km²

Area

Gauges within the Svärtaån drainage basin

5 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 BAGGEBOL NEDRE 3'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.

0.014 m³/s

Q95 low flow

0.313 m³/s

Q50 median flow

0.717 m³/s

Q10 high flow

Largest day of each water year at BAGGEBOL NEDRE 3

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	BAGGEBOL NEDRE 3 (m³/s)
1979	0.390
1980	1.06
1981	1.28
1982	0.700
1983	0.700
1984	1.51
1985	1.39
1986	0.700
1987	1.45
1988	0.560
1989	0.790
1990	0.550
1991	0.510
1992	0.490
1993	0.880
1994	1.69
1995	0.210
1996	0.700
1997	0.750
1998	1.38
1999	0.650
2000	1.54
2001	1.01
2002	0.630
2003	0.630
2004	0.500
2005	0.610
2006	1.37
2007	0.720
2008	0.850
2009	1.10
2010	0.800
2011	0.710
2012	0.980
2013	0.900
2014	1.04
2015	0.530
2016	0.350
2017	1.40
2018	0.710
2019	0.710
2020	0.790
2021	0.510
2022	0.840
2023	1.29
2024	0.520
2025	0.590

The longest record here

Mean river flow at BAGGEBOL NEDRE 3

Annual means of the daily record, 1979–2025. 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	BAGGEBOL NEDRE 3 (m³/s)
1979	0.322
1980	0.343
1981	0.452
1982	0.389
1983	0.312
1984	0.390
1985	0.503
1986	0.529
1987	0.483
1988	0.496
1989	0.188
1990	0.238
1991	0.277
1992	0.249
1993	0.228
1994	0.508
1995	0.701
1996	0.159
1997	0.304
1998	0.434
1999	0.441
2000	0.547
2001	0.617
2002	0.431
2003	0.206
2004	0.234
2005	0.231
2006	0.463
2007	0.420
2008	0.371
2009	0.311
2010	0.445
2011	0.322
2012	0.523
2013	0.361
2014	0.318
2015	0.485
2016	0.201
2017	0.197
2018	0.352
2019	0.185
2020	0.229
2021	0.341
2022	0.226
2023	0.447
2024	0.422
2025	0.192

Every gauge Hydrionis holds within this area

Gauges within the Svärtaån and what each holds
Gauge	Measures	Values	Record
BAGGEBOL NEDRE 3	mean river flow	17,440	1979–2026
BAGGEBOL NEDRE 2	mean river flow	9,618	1951–1979
BAGGEBOL NEDRE	mean river flow	3,456	1942–1951
BAGGEBOL	mean river flow	3,043	1933–1942
Kvarnstugan VM	mean river flow	736	2009–2011

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 — 64000. 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
BAGGEBOL NEDRE 3	Stated by the publisher on the record this gauge’s observations came from.	With the observations
BAGGEBOL NEDRE 2	Stated by the publisher on the record this gauge’s observations came from.	With the observations
BAGGEBOL NEDRE	Stated by the publisher on the record this gauge’s observations came from.	With the observations
BAGGEBOL	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kvarnstugan VM	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	5	yes, 3 or more
Years spanned	94	yes, 20 or more
Values held	34,293	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-2250.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), Svärtaån gauge records, accessed 2026-10-05, hydrionis.com/waters/sweden-svartaan/

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 Svärtaån 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, 2250. 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 1979-02-19 to 1979-06-11 (not yet checked), 2021-09-25 to 2022-08-28 (roughly checked), 2026-01-02 to 2026-09-30 (not yet checked). Station in the SVÄRTAÅN main drainage basin, 59 km². Discharge is a property of this gauge and this reach, not of the river as a whole.

Retrieved 1 October 2026.