The monitoring network within this area

Hydrionis holds 74,971 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
74,971
Values held
1927–2026
Record spans
344 km²
Area
Gauges within the Fylleån drainage basin
4 monitoring points, positioned as the publisher records them.
Gauges within the Fylleån drainage basinGÅRDSILT, SIMLÅNGEN, ÅBACKEN, ÅDALAGÅRDSILTSIMLÅNGENÅBACKENÅDALA

The longest record here

Mean river flow at GÅRDSILT
Annual means of the daily record, 1928–2019. One gauge, not this drainage area.
Mean river flow at GÅRDSILTMean river flow at GÅRDSILT: GÅRDSILT in m³/s, from 1928 to 2019.0.511.522.5m³/s19281940195219641976198820002012

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
PeriodGÅRDSILT (m³/s)
19281.61
19291.13
19301.26
19311.52
19321.12
19330.775
19341.13
19351.44
19361.11
19370.830
19381.23
19390.946
19401.42
19410.699
19421.25
19431.53
19441.44
19451.60
19461.59
19470.954
19481.29
19491.56
19501.58
19511.34
19521.32
19531.37
19541.95
19551.12
19561.42
19571.47
19581.23
19590.931
19601.15
19611.29
19621.58
19631.35
19641.09
19651.10
19661.54
19671.51
19681.20
19690.840
19701.60
19711.40
19721.06
19731.18
19741.49
19751.06
19760.923
19771.67
19781.47
19791.64
19801.66
19811.59
19821.40
19831.52
19841.28
19851.57
19861.25
19871.32
19881.72
19891.09
19901.64
19911.32
19921.48
19931.38
19941.75
19951.28
19960.806
19971.03
19982.03
19991.55
20001.52
20011.04
20021.52
20030.960
20041.67
20051.27
20061.70
20071.93
20081.79
20091.15
20101.60
20111.85
20121.52
20131.25
20141.58
20151.60
20160.942
20171.72
20181.05
20191.60

Every gauge Hydrionis holds within this area

Gauges within the Fylleån and what each holds
GaugeMeasuresValuesRecord
GÅRDSILTmean river flow33,7551927–2019
SIMLÅNGENmean river flow27,3251951–2026
ÅBACKENmean river flow11,4891927–1958
ÅDALAmean river flow2,4022019–2025

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 — 100000. 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
GaugeEvidenceEstablished
GÅRDSILTStated by the publisher on the record this gauge’s observations came from.With the observations
SIMLÅNGENStated by the publisher on the record this gauge’s observations came from.With the observations
ÅBACKENStated by the publisher on the record this gauge’s observations came from.With the observations
ÅDALAStated 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
SignalHeldCounts
Gauges holding a real record4yes, 3 or more
Years spanned100yes, 20 or more
Values held74,971yes, 1000 or more
Distinct measurements1no
Publishers measuring it1no
Official identifiers2recorded, not counted

Where these figures come from

MeasuredHigh confidence2019-12-30

Source: SMHISwedish hydrological observations, 1207. 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.

Every value is checked and approved by SMHI. Station in the FYLLEÅN main drainage basin, 55 km². Discharge is a property of this gauge and this reach, not of the river as a whole.

Retrieved 25 August 2026.