Epte

The Epte is a French Rivière, long 113 kilometers, affluent of Right Bank of the the Seine. It is born in Seine-Maritime, in the Pays of Bray, close to Forging mill-the-Water and joined the Seine close to Giverny in the the Eure. The river marks the limit between the Normandy and the Île-de-France; this geographical location deeply marked its history with the Moyen-âge with the construction of a whole series of fortified towns on each one of its banks.

Geography

Epte takes its source with Serqueux, with a few kilometers in the north of Forging mill-the-Water (Seine-Maritime), runs in a north-western direction - south-east until Gournay-in-Bray, then is directed towards the south until the the Seine.

On the near total of its course, it marks the limit between the High-Normandy, on the one hand, and the Picardy and the Île-de-France on the other hand, initially separating the Seine-Maritime from Oise, then starting from Bouchevilliers marking the limit of the the Eure with successively the Oise, the Val-d'Oise and the Yvelines.

Hydrology

Epte presents a typical oceanic rain mode with an estival low water level and a winter maximum, its flow is modest: 9,8 m ³ a second with Gommecourt, the junction with the the Seine.

Like the majority of the rivers of the western end of the Area catchment the Seine, Epte is a remarkably regular river. Its annual medium flow, calculated over 47 years with Fourges (of 1961 with 2007), is of 9,31 m ³ a second for a surface of 1.403 km ², that is to say nearly 95% totality of the basin.

The river presents a very regular mode, with weak seasonal fluctuations of flow. The high waters are winter and push the monthly averages on a level of 10,6 to 12,6 m ³ from December to April included. The low waters of summer, from August at October, remain comfortable and characterized by a weak fall of the monthly medium flow, until 6,3 m ³ a second in August. The VCN3 can fall to 3,5 m ³ a second, in the event of dry period quinquennial, which remains relatively extremely high.

The risings are generally not very important but by no means non-existent. Thus the recorded maximum instantaneous flow was of 50,7 m ³ a second on March 24th, 2001, while the value maximum day laborer was of 48,8 m ³ a second the same day. The QIX 10 or calculated flow of decennial rising is of 38 m ³ a second, the QIX 20 of 43 m ³ and the QIX 50 of 50 m ³. The QIX 2 and QIX 5 are worth as for them respectively 25 and 33 m ³ (see note). From where it arises that the risings of March 2001 were cinquantennales.

The Lame of water past in the basin is of 210 millimetres annually, a little lower than the average of the catchment area of the the Seine (220 millimetres), but definitely lower than the French average (approximately 300 millimetres). The specific Débit or Qsp is assembled consequently at 6,6 liters a second and per square kilometer of basin, which is extremely moderate.

Affluents

Principal the Affluent S of Epte (of the upstream towards the downstream) is:

History

This river forms the historical border between the Normandy and the France, then the Île-de-France, since the Traité Saint-Clearly-on-Epte signed in 911 by Charles III the Simple one and Rollon, chief Viking. At the time of this agreement, the adventurers of North accepted the territories ranging between the course of Epte and that of the Dives, namely the Vexin in the west of the river, from now on called Norman Vexin, the Pays of Caux, the Roumois, the Evrecin, the Lieuvin and the Pays of Trough. The signature of this treaty gave place to an episode cocasse, reported by an anonymous chronicle, whose the king of France was victim: Rollon refusing to kiss the feet of the sovereign, however his Suzerain.
That which receives such a gift, told him the bishops, must kiss the foot of the King.
Never, answered it, I will not bend the knee in front of somebody, nor will not kiss his foot.
However, pushed by the prayers of the Francs, it ordered with the one its warriors to do it in his place,
This one seizes the foot of the King and carried it to its mouth, but it kissed it without being inclined and made fall the King to the shift.
From there of great bursts of laughter, a great tumult in crowd….
Border zone, the valley of Epte covered surmounted mounds castrales turns of monitoring, then of strong castles; somewhat behind, a second line of fortresses was used as cover in the event of attack. Norman side, the first line of fortifications was organized around the powerful castle of Gisors framed by the secondary works of Gournay-in-Bray, Nine-Market in north, Neaufles-Saint-Martin, Dangu, Castle-on-Epte, Baudemont, and Gasny in the south. This first curtain was supplemented by one second series of fortified towns built along the valley of the Andelle, with Radepont and Douville-on-Andelle, but also by an intermediate network of fortresses: castles of Étrépagny, Lyons-the-Forest and especially of the Andelys (Castle-Strapping man celebrates it), turns of guet on mounds with Hacqueville and Longchamps. French side, the line of defense was based on the fortifications of Gerberoy, Sort-Castle, Chaumont-in-Vexin, Courcelles-lès-Gisors, Boury-in-Vexin, Saint-Clearly-on-Epte and the Rock-Guyon with the junction of Epte and the the Seine.
Another painter impressionist, Camille Pissarro, as for him lived and paints with Éragny-on-Epte (Tables on Commons).

Departments and communes crossed

Appendices

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