Risle

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Risle
Risle river shrinkage at La Ferrière-sur-Risle

Risle river shrinkage at La Ferrière-sur-Risle

Data
Water code FR :  H6-0200
location France , Normandy region
River system His
Drain over Its  → English Channel
source south of Planches
48 ° 40 ′ 12 ″  N , 0 ° 21 ′ 38 ″  E
Source height approx.  275  m
muzzle at Berville-sur-Mer in the confluence of the Seine Coordinates: 49 ° 26 ′ 19 "  N , 0 ° 22 ′ 17"  E 49 ° 26 ′ 19 "  N , 0 ° 22 ′ 17"  E
Mouth height approx.  5  m
Height difference approx. 270 m
Bottom slope approx. 1.9 ‰
length 145 km
Left tributaries Bave, Sommaire , Charentonne , Veronne, Vernet
Right tributaries Aubette
Small towns L'Aigle , Pont-Audemer
The Risle near Noyer-en-Ouche

The Risle near Noyer-en-Ouche

The Risle is a river in France that runs in the Normandy region . It rises south of Planches , at 275 meters above sea level, first drains to the northeast, then turns to the north, later to the northwest, and after 145 kilometers it flows into the estuary of the Seine at Berville-sur-Mer .

Crossed departments

Places on the river

(Order in flow direction)

Hydrology

On 30 July 2012, the Risle between fell Ajou and La Houssaye in a river sinkhole . It now runs underground for 12 kilometers. The water of the Risle was colored in order to understand the course of the river. The underground water increases the risk of further ponors. The stability of some bridges in the now dry section is threatened by the lack of water. This includes the bridge over the Risle in Grosley-sur-Risle . All the fauna and flora of the river have been destroyed over a length of more than 10 kilometers .

The underground cavity enlarged in winter, but in the meantime (as of July 2013) the change seems to have come to a standstill. On the stretch of the river between Ajou and La Houssaye, a total of 150 cubic meters of stones were placed in the Ponor on July 15 and 19. The cavity is not yet completely filled.

literature

  • Laurent Colombe: La Risle: Fleuve de Normandie . Une histoire d'eau. Ajou 2003 (French).

Web links

Commons : Risle  - collection of images, videos and audio files

Individual evidence

  1. ↑ a b geoportail.fr (1: 16,000)
  2. ↑ a b The information on the length of the river is based on the information about the Risle at SANDRE (French), accessed on December 12, 2008, rounded to full kilometers.
  3. ↑ Your: la Risle disparaît en partie. paris-normandie.fr, July 30, 2012, archived from the original on August 6, 2012 ; Retrieved July 31, 2012 (French).
  4. ↑ Une forte mortalité piscicole. paris-normandie.fr, August 2, 2012, archived from the original on February 13, 2013 ; accessed on August 2, 2012 (French).
  5. ↑ Raphael Hudry: Le point sur la bétoire de la Risle . Impact environnemental catastrophique. In: Christophe Lemoine (ed.): L'éveil Normand . No. 1897 . Publihebdos, Bernay August 8, 2012, p. 6 + 34 (French).
  6. ↑ La Risle en voie de guérison. paris-normandie.fr, July 22, 2013, archived from the original on July 22, 2013 ; Retrieved on July 22, 2013 (French, also in the printed edition of July 20).