The monitoring network within this area

Hydrionis holds 29,424 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

29,424

Values held

1963–2026

Record spans

Gauges within the Kiskonjoki + Perniönjoki 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 Kiskonjoki, Koski, kokonaisvirtaama's whole daily record between 1963 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.

0.300 m³/s

Q95 low flow

4.200 m³/s

Q50 median flow

12.600 m³/s

Q10 high flow

Largest day of each water year at Kiskonjoki, Koski, kokonaisvirtaama

The highest daily mean discharge in each October-to-September water year, 1963–2022.

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	Kiskonjoki, Koski, kokonaisvirtaama (m³/s)
1963	14.9
1964	16.2
1965	70.4
1966	23.4
1967	25.0
1968	26.0
1969	43.0
1970	17.8
1971	21.0
1972	14.8
1973	26.0
1974	22.5
1975	12.7
1976	24.5
1977	15.3
1978	15.4
1979	15.5
1980	33.9
1981	23.6
1982	19.1
1983	31.1
1984	15.4
1985	18.5
1986	20.4
1987	15.5
1988	17.6
1989	29.0
1990	15.0
1991	17.0
1992	14.5
1993	23.0
1994	17.7
1995	13.9
1996	16.2
1997	13.2
1998	28.5
1999	15.7
2000	12.7
2001	16.0
2002	8.00
2003	10.8
2004	32.5
2005	17.2
2006	21.0
2007	26.3
2008	25.5
2009	32.5
2010	32.6
2011	32.8
2012	23.8
2013	17.3
2014	19.9
2015	26.0
2016	9.16
2018	33.3
2019	32.5
2020	18.8
2021	32.7
2022	22.9

The longest record here

Mean river flow at Kiskonjoki, Koski, kokonaisvirtaama

Annual means of the daily record, 1963–2024. 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	Kiskonjoki, Koski, kokonaisvirtaama (m³/s)
1963	4.64
1964	3.62
1965	4.47
1966	6.99
1967	8.17
1968	5.84
1969	5.39
1970	6.05
1971	4.41
1972	4.80
1973	4.46
1974	7.36
1975	3.73
1976	2.43
1977	6.21
1978	5.86
1979	5.46
1980	6.36
1981	8.85
1982	5.44
1983	4.30
1984	7.02
1985	4.28
1986	6.65
1987	5.47
1988	7.11
1989	5.13
1990	6.19
1991	6.44
1992	6.63
1993	5.14
1994	5.95
1995	6.61
1996	4.91
1997	4.40
1998	5.71
1999	5.83
2000	6.45
2001	5.30
2002	3.97
2003	1.49
2004	6.28
2005	7.23
2006	4.80
2007	7.10
2008	9.24
2009	3.58
2010	4.99
2011	6.15
2012	8.39
2013	5.19
2014	4.29
2015	7.18
2016	5.03
2017	6.58
2018	5.85
2019	7.45
2020	9.53
2021	5.62
2022	5.54
2023	6.63
2024	6.34

Every gauge Hydrionis holds within this area

Gauges within the Kiskonjoki + Perniönjoki and what each holds
Gauge	Measures	Values	Record
Kiskonjoki, Koski, kokonaisvirtaama	mean river flow	22,865	1963–2026
Perniönjoki Pohjankoski	mean river flow	4,178	2015–2026
Kiskonjoki, Koski, pato	mean river flow	1,395	2022–2026
Kiskonjoki, Koski, kalatie	mean river flow	986	2023–2026

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 — 24. 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
Kiskonjoki, Koski, kokonaisvirtaama	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Perniönjoki Pohjankoski	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kiskonjoki, Koski, pato	Stated by the publisher on the record this gauge’s observations came from.	With the observations
Kiskonjoki, Koski, kalatie	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	64	yes, 20 or more
Values held	29,424	yes, 1000 or more
Distinct measurements	1	no
Publishers measuring it	1	no
Official identifiers	1	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/fi-syke-2400400.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.

Contains data from the Finnish Environment Institute (Syke), licensed under CC BY 4.0.

Suomen ympäristökeskus (Finnish Environment Institute) — CC BY 4.0 (licence text)

Suggested citation for Hydrionis

Hydrionis (2026), Kiskonjoki + Perniönjoki gauge records, accessed 2026-10-05, hydrionis.com/waters/finland-kiskonjoki-pernionjoki/

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 Kiskonjoki + Perniönjoki 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

MeasuredHigh confidence2026-09-30

Source: Syke — Hydrologiarajapinta — Finnish national hydrological archive, 2400400. Licence: Open — attribution required (attribution required).

Method: Daily discharge exactly as the Finnish Environment Institute publishes it. Syke computes the daily value from its own 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. Values Syke flags as possibly erroneous are not stored.

46 of these values (under 1%) are interpolated by Syke rather than measured, and are marked as such in its own archive. Station in the Kiskonjoki + Perniönjoki main drainage basin, Kirkkojärven la sub-basin. Discharge is a property of this gauge and this reach, not of the river as a whole.

Retrieved 1 October 2026.