OFFICIAL HYDROGRAPHIC OBSERVATION REPORT FR

L'yon River Water Level & Telemetry

Gauge Station: L'yon à Chaillé-sous-les-ormeaux - Rassouillet • Bassin de la Loire• France

● NORMAL FLOW

Water Level (STAGE)

1.25 m

Relative to baseline datum

Discharge / Flow

— m³/s

Instantaneous volumetric discharge

Elevation

89 ft

Elevation above sea level

VERIFIED TELEMETRY • SOURCE: Hub'Eau Hydrométrie • GAUGE ID: N342301021 • COORD: 46.577°, -1.355°

OBSERVED: Oct 1, 2026, 4:06 PM

L'yon River Where It Flows & Gauge Station

HYDROGRAPHIC MAP & GAUGING LOCATION

PRECIPITATION RADAR

GEOGRAPHIC COURSE & HYDROLOGICAL REACH

Where It Flows: L'yon River

The L'yon River is a vital waterway situated within France, flowing predominantly across the Bassin de la Loire basin. It forms an integral artery of the L'yon drainage basin. Along its course, it navigates through or proximate to Chaille-sous-les-ormeaux, providing municipal drainage, agricultural sustenance, and freshwater habitat. Continuous hydrological surveillance at the L'yon à Chaillé-sous-les-ormeaux - Rassouillet gauging station (coordinates: 46.5766°N, -1.3548°W) allows real-time quantification of upstream runoff, seasonal snowmelt pulses, and meteorological flood crests.

COUNTRY

France

REGION / STATE

Bassin de la Loire

CATCHMENT BASIN

L'yon

GAUGING LOCATION

Chaille-sous-les-ormeaux

MONITORING STATIONS & GAUGES ALONG (2) UPSTREAM & DOWNSTREAM POINTS

Station / Location	REGION / STATE	Coordinates	Station ID	Action
L'yon à Chaillé-sous-les-ormeaux - Rassouillet CURRENT GAUGE	Bassin de la Loire	46.577°, -1.355°	N342301021	Viewing
L'yon à Dompierre-sur-yon	Bassin de la Loire	46.736°, -1.384°	N340301010	View Level →

FREQUENTLY ASKED QUESTIONS ABOUT WATER LEVELS

Frequently Asked Questions About Water Levels: L'yon River

What is the current L'yon River water level today? ↓

As of the latest continuous telemetry report, the L'yon River water level at L'yon à Chaillé-sous-les-ormeaux - Rassouillet is measured at 1.25 m with an observed discharge of active seasonal rate.

Where is the official monitoring gauge for L'yon River located? ↓

The primary monitoring station for L'yon River is located at coordinates 46.5766° Latitude and -1.3548° Longitude near Chaille-sous-les-ormeaux in Bassin de la Loire. Telemetry is recorded under site identifier N342301021.

What are normal water levels and flood stages for L'yon River? ↓

Typical hydrological levels on the L'yon River generally fluctuate within the standard median band and seasonal bankfull discharge. When stage exceeds these parameters, localized bank overflow and flood advisories may be triggered.

Where does the L'yon River flow? ↓

The L'yon River courses through France across the Bassin de la Loire basin, draining into the L'yon. It provides critical natural drainage and freshwater replenishment across its catchment reach.