The monitoring network on this water

Hydrionis holds 2,726 values from 3 gauges on this water. Discharge is a property of a gauge and its reach, not of this water as a whole, so this page reports the network and its records rather than a single figure.

3
Gauges
2,726
Values held
1921–2026
Record spans
1,839 km²
Catchment above the deepest gauge

The seasonal shape

An annual mean says how much water a river carried. A monthly record says when — and on most rivers the difference between a wet winter and a dry summer is larger than the difference between one year and the next.

Monthly mean flow at L'Aude à Belvianes-et-Cavirac et à Quillan
Each month's mean discharge as the publisher computed it, which shows the seasonal shape an annual mean flattens away. 1921–2026.
Shading marks when something was recorded, not what caused the line.
Monthly mean flow at L'Aude à Belvianes-et-Cavirac et à QuillanMonthly mean flow at L'Aude à Belvianes-et-Cavirac et à Quillan: L'Aude à Belvianes-et-Cavirac et à Quillan in m³/s, from 1921 to 2026.European drought0204060m³/s19211934194719641977199520082021

Taken as the publisher computes it rather than recomputed by Hydrionis from daily values: the publisher knows which of its readings passed validation. Months the gauge did not cover are absent rather than interpolated, and the line breaks where they fall.

What the shaded periods are (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

EventTypePeriodStandingAuthority
European droughtDrought declaration2022-05-01 – 2022-10-31Documented record
Compiled record

Not shown on this chart

  • The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
  • Hurricane Katrina water and sanitation collapse — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
View the data behind this chart
Underlying data
PeriodL'Aude à Belvianes-et-Cavirac et à Quillan (m³/s)
192117.2
192211.6
19238.77
192414.6
19253.97
192613.4
192710.6
192812.4
192910.0
193015.2
193118.7
19328.08
193315.6
19349.56
193518.0
193612.7
19378.99
193813.0
193919.2
194011.2
194118.8
194217.9
19438.22
194410.3
194512.5
194610.1
194712.0
194814.5
19495.93
195011.5
195511.6
195613.0
19577.20
19586.84
195913.7
196017.7
196119.1
196210.0
196314.0
19648.31
196517.5
196620.7
196715.0
196819.8
196915.3
197015.1
197110.3
197221.9
19739.23
19747.73
197514.0
19767.31
197715.6
19789.46
197915.6
198017.3
198137.0
198222.4
19885.59
19895.41
19904.45
199111.4
19928.43
19939.99
199415.9
199512.0
199612.6
199721.2
19987.45
19998.99
20006.28
20017.89
20023.88
200315.0
200415.7
200519.5
20068.33
20073.20
20085.85
200912.0
20107.79
20115.38
201210.8
201315.3
201420.2
201511.4
20168.72
20177.98
201819.9
20199.00
202027.2
202113.8
202221.9
20235.93
20247.03
20259.97
202616.6

About this series

Everything below is a property of the data rather than a rating of it. There is deliberately no single confidence score: how much a gap matters depends on what you are about to do with the series, and only you know that.

Source
Office français de la biodiversité / SCHAPI — Hydrométrie — French river flow and stage · Licence Ouverte / Open Licence v2.0 (Etalab)
How the values came to existMeasured
Period held1921–2026
Completeness91.5% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps
  • 2 separate periods inside 1921–2026 hold no value. The longest runs from 1983 to 1987 — 5 years with no reading. They are drawn as breaks in the line and are never interpolated across.
ContinuityThe record begins in 1921 and is not continuous from it: 106 years separate the first value from the last, and 92% of the years between them are held. The span is not the record.
Last read from the publisher2026-10-01
RedistributionPermitted by the upstream licences
Commercial reusePermitted by the upstream licences. No Hydrionis access tier can widen this.
MethodologyHow this was produced

Every gauge Hydrionis holds here

Gauges on the L'Aude and what each holds
GaugeMeasuresValuesRecord
L'Aude à Belvianes-et-Cavirac et à Quillanmean monthly river flow1,1371921–2026
L'Aude à Puyvalador [QNR]mean monthly river flow9201948–2024
L'Aude à Carcassonnemean monthly river flow6691969–2026

How these gauges were attached to this water

Named by the publisher Each gauge here names this water in the publisher’s own station record. Hydrionis has not inferred the connection from station names.

What each gauge’s link to this water rests on
GaugeEvidenceEstablished
L'Aude à Belvianes-et-Cavirac et à QuillanStated by the publisher — Hub'Eau hydrometry site reference, libelle_cours_eau, code_cours_eau and surface_bv fields — https://hubeau.eaufrance.fr/api/v2/hydrometrie/referentiel/sites2026-10-02
L'Aude à Puyvalador [QNR]Stated by the publisher — Hub'Eau hydrometry site reference, libelle_cours_eau, code_cours_eau and surface_bv fields — https://hubeau.eaufrance.fr/api/v2/hydrometrie/referentiel/sites2026-10-02
L'Aude à CarcassonneStated by the publisher — Hub'Eau hydrometry site reference, libelle_cours_eau, code_cours_eau and surface_bv fields — https://hubeau.eaufrance.fr/api/v2/hydrometrie/referentiel/sites2026-10-02

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 record3yes, 3 or more
Years spanned106yes, 20 or more
Values held2,726yes, 1000 or more
Distinct measurements1no
Publishers measuring it1no
Official identifiers2recorded, not counted

Use this data

Use this data

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.

Source: Hub’Eau / Système d’information sur l’eau, under Licence Ouverte (Etalab).

Suggested citation for Hydrionis

Hydrionis (2026), L'Aude gauge records, accessed 2026-10-05, hydrionis.com/waters/france-laude/

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 L'Aude 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 confidenceSeptember 2026

Source: Hub'Eau — Hydrométrie — French river flow and stage, Y1112010 (Y111201001). Licence: Open — attribution required (attribution required).

Method: Monthly mean discharge (QmM) computed by the publisher from its validated sub-hourly record, reported in litres per second and converted to cubic metres per second as they are collected. Where a site has been measured by more than one station, the station with the longest published series is used rather than blending stations whose values for the same month can differ.

Measured on L'Aude.

Retrieved 1 October 2026.