Huisne

The Huisne is a river the North-West of the France.

Geography

Huisne takes its source with the Stone quarry, close to Pervenchères in the Orne. It is one of the branches of the range of rivers which descend from the dorsal of the Norman Bocage and the Chartres-native Pays as well as the Orne, the Iton, the the Eure, the Loir and the the Sarthe of which it is the affluent of left bank, and which it finds with the Mans after a course of 161 kilometers.

The river follows initially a slope in direction of south-east, turns to right angle to Nogent-le-Rotrou to slip by, towards south-west, along the great fault of the Perche.

Its basin of 2 385 km ² extend in the Calcaire Crétacé covered with Argile to flint, sometimes perforated outcrops Jurassic S. Of the modest coast S, moderate precipitations explain a quite low flow (15 m ³ /s in Mans) with a low water level of constant summer and Crue S winter, sometimes strong, downstream.

Crossed localities

Huisne sprinkles the cities and boroughs of Rémalard, Nogent-le-Rotrou, the Ferté-Bernard, Connerré, Montfort-le-Gesnois, Champagné and of the Mans.

Although not sprinkling the city, Huisne had given its revolutionary name to Mortagne-with-Pole: Mortagne-on-Huisne.

Affluents

Hydrology

The flow of Huisne was observed over one 25 years period (1983 - 2007), with Montfort-le-Gesnois, locality of the department of the the Sarthe, located at a score of kilometers upstream of the city of the Mans thus of the confluence with the the Sarthe. At this place the catchment area of the river is of 1 890 km ² (on a total of 2 385). The following figures exclude in particular those from the Parence and the Narais.

The interannual medium flow or module of the river with Montfort-le-Gesnois is of 13,1 m ³ a second.

Huisne presents the seasonal fluctuations of flow not very important and typical of the rivers of the basin ligérien north-Westerner, with high waters of winter carrying the average flow monthly on a level located between 15,5 and 23 m ³ a second, from December to April included (maximum in January), and of low waters of summer of mid-June at October, with a fall of the monthly medium flow going until 10,75 m ³ in August, which remains extremely abundant.

The VCN3 can fall until 3,7 m ³, in the event of dry period quinquennial, which remains very comfortable (see note).

In addition the risings can be rather important. The QIX 2 and QIX 5 are worth respectively 73 and 100 m ³ a second. The QIX 10 or calculated flow of decennial rising is of 120 m ³ a second, the QIX 20 is worth 140 m ³ a second while the QIX 50 is assembled to 170 m ³. (see note). The recorded maximum instantaneous flow was of 178 m ³ a second on January 24th, 1995, while the value maximum day laborer was of 156 m ³ a second the same day. By comparing these figures with the values of the various QIX of the river, it appears that these risings were of order cinquantennal and thus rather exceptional.

The Lame of water past in the basin of Huisne is of 219 millimetres annually, which is fairly abundant in the context of the basin ligérien. It is certainly definitely lower than the overall average of the France, like than that of the catchment whole of the area of the the Loire (244 millimetres), but higher than the basin of the the Sarthe (201 millimetres) and especially of the close Loir (129 millimetres). The specific Débit (or Qsp) is assembled at 6,9 liters a second and per square kilometer of basin.

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