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Hers-Vif

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Coordinates:43°18′21″N1°33′9″E / 43.30583°N 1.55250°E /43.30583; 1.55250

From Wikipedia, the free encyclopedia

River in France

Hers-Vif


Location
Country	France
Physical characteristics

Source
• location	Pyrenees
• elevation	±1,500 m (4,900 ft)

Mouth
• location	Ariège
• coordinates	43°18′21″N1°33′9″E / 43.30583°N 1.55250°E /43.30583; 1.55250
Length	135 km (84 mi)
Basin size	1,350 km² (520 sq mi)

Discharge
• average	15 m³/s (530 cu ft/s)

Basin features
Progression	Ariège→Garonne→Gironde estuary→Atlantic Ocean

TheHers-Vif (French pronunciation:[ɛʁsvif], "Live Hers" (Occitan:Erç Viure), as opposed to the slower flowingHers-Mort, "Dead Hers"), also namedGrand Hers or simplyHers, is a 135-kilometre (84 mi) longriver in southernFrance, right tributary of theAriège.^[1]

The Hers-Vif rises at an elevation of about 1,500 metres (4,900 ft) near theChioula Pass of thePyrenees, approximately 6 kilometres (4 mi) north ofAx-les-Thermes. It is the major tributary of the Ariège into whose right bank it flows 2 kilometres (1.2 mi) upstream fromCintegabelle in theHaute-Garonne.

It flows some 30 kilometres (19 mi) through the Pyrenees, descending 1,100 metres (3,600 ft) to the village of Peyrat, where it reaches a piedmont plain. Its valley widens as it traverses the plain, reaching the medieval city ofMirepoix, which marks the start of its lower valley.

Several rivers flow into it:

From the Pyrenees: theLasset; theFontaine de Fontestorbes; theTouyre
From the piedmont plain and hills: theBlau and theDouctouyre;
From the hills ofLauragais andRazès: theAmbronne and theVixiège.

Departments and towns along its course are:

Floods

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The Hers is probably known asvif (intense orrapid in this context) because of its sometimes spectacular floods – that of 16 June 1289 having entirely destroyed Mirepoix. More recently, there have been:

23 June 1875: estimated flow rate of 1,500 cubic metres per second (53,000 cu ft/s) atMazères;
6 February 1919: estimated flow rate of 600 to 800 cubic metres per second (21,000 to 28,000 cu ft/s) at Mazères;
19 May 1977: estimated flow rate of 1,070 cubic metres per second (38,000 cu ft/s) at Mazères;
16 January 1981: estimated flow rate of 1,100 cubic metres per second (39,000 cu ft/s) at Mazères;
11 June 2000: estimated flow rate of 500 cubic metres per second (18,000 cu ft/s) at Mazères;
24 January 2004: estimated flow rate of 500 cubic metres per second (18,000 cu ft/s) at Mazères.