Anglin

Anglin is a French river, tributary of the Gartempe, and thus tributary of a tributary of the Vienna. Its confluence is in the locality of Angle-on-the Anglin, village of the department of the Vienna.

The catchment area of the Angles is surrounded of the basins of Hollow in the east and north and of Gartempe in the west.

Hydrology

Its flow was observed over one 33 years period (1969-2001), on the level of Mérigny, locality located in the Département of Indre at the limit of the department of the Vienna, little before its confluence.

The interannual medium flow or module of Anglin is of 13 m ³ a second.

The river present of important seasonal fluctuations of flow, with risings of winter-spring of 14,8 to 28,8 m ³ from December at May included (maximum in February), and the thin ones of summer, in July - August-September, with a fall of the monthly medium flow up to 2,07 m ³ in August.

Moreover, the VCN3 can fall under the 0,3 m ³ in the event of quinquennial dry. The VCN3 is the past minimal quantity or minimal flow over three days consecutive.

As for the risings, they can be catastrophic. The QIX 2 and QIX 5 are worth respectively 210 and 330 m ³. The QIX 10 or calculated flow of decennial rising is of 400 m ³ a second, the QIX 20 of 470 m ³ and the QIX 50 of 560 m ³ (see note), values exceeding of more or less fifteen % those of Gartempe with Montmorillon, however definitely more abundant than Anglin (medium flow of 22,2 m ³ against 13 m ³).

As comparison with an important river of the Paris basin, let us stress that the QIX 10 of the Marne at the end of the course, in the Paris region, is worth 510 m ³ against 400 for Anglin, and that its QIX 50 is assembled to 650 m ³ (against 560 for Anglin). Thus the flows calculated of believed of the Marne exceed only some 15% those of Anglin, whereas its basin is nearly eight times wider.

The recorded maximum instantaneous flow was of 611 m ³ a second on May 1st, 1981, that is to say more than the medium flow of the Seine to its mouth. By comparing these data with the scale of the calculated QIX of the river, one notes that this rising was more than cinquantennale, perhaps centennial, and thus exceptional.

The Lame of water past in the basin of Anglin is of 252 millimetres annually, which is average, lower than the whole of France all confused basins, but definitely higher than the figures recorded in the north-western part of the Paris basin (often about 150 mm). The specific flow (Qsp) is assembled at 8,0 liters a second and per square kilometer of basin.

Affluents

Internal bonds

References

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