Avenelles (river)

The Avenelles or Ru of the Kidney is a French Rivière which runs in the Département of Seine-et-Marne (77). It is an affluent of the Orgeval out of Right Bank, therefore a tributary of a tributary of the the Seine by Orgeval, the Grand Morin then the Marne.

Geography

Avenelles are one of the rivers of the Brie. The river is born on the territory from the commune of Pierre-Lifting, in an wooded area. The river has an general orientation going of the North-West towards south-east. Throughout its course, it receives small affluents come from north and west. It joins the Orgeval (Right Bank) with Boissy-le-Châtel, little before Orgeval is not thrown in the Grand Morin.

Common crossings

The river crosses successively the communes of Pierre-Lifting, the High-House, Jouarre, Aulnoy, Coulommiers and Boissy-le-Châtel, all located in the Département of Seine-et-Marne.

Hydrology

The annual medium flow or module of Avenelles, observed during one 29 years period (of 1962 to 1991), with Boissy-le-Châtel, locality located at the level of its confluence with Orgeval, is of 0,285 m ³ a second for a surface of basin of 46,7 km ² (ref.: ).

The river presents seasonal fluctuations of flow rather distinct. The period of high waters proceeds in winter and is characterized by average monthly flows going from 0,454 to 0,652 m ³ a second, from December to March included (with a maximum enough Net in February). As of the end of March, the flow decreases quickly to the low waters which take place from June to October included, accompanied by a fall of the monthly medium flow going up to 0,066 m ³ in August, which is acceptable still enough for such a small river. However the fluctuations of flow can be more important according to the years and over shorter periods.

With the low water level the VCN3 can fall until 0,025 m ³, in the event of dry period quinquennial, that is to say 25 liters a second, which is not too severe (see note).

The risings however can be very important, taking into account the exiguity of the basin of the river. The QIX 2 and QIX 5 or calculated flows of biennial and quinquennial rising are worth respectively 5,5 and 8,3 m ³ a second. The QIX 10 or calculated flow of decennial rising is of 10 m ³ a second, the QIX 20 of 12 m ³, while the QIX 50 is assembled to 14 m ³ a second (see note). If one compares these figures with the flows of believed of the Grand Morin, by taking account of the respective surface of the two rivers, one notes that the risings of Avenelles are close to twice more important than those to Large Morin, well-known river for the importance of his overflows.

The recorded maximum instantaneous flow with Boissy-le-Châtel during this period, was of 14,1 m ³ a second on March 14th, 1980, while the recorded maximum daily output was of 9,99 m ³ a second the same day. If one compares the first of these values to the various QIX of the river, one notes that this rising was of order cinquantennal, i.e. relatively exceptional and intended to reproduce statistically every 50 years.

On the whole, Avenelles are a fairly abundant river, like the majority of its neighbors and in particular Orgeval. The Lame of water past in its catchment area is of 198 millimetres annually, which is certainly definitely lower than the average of France, all confused basins, and also with the average of the basin of the Seine (more or less 240 millimetres), but locates Avenelles in a good average among the rivers of Ile-de-France. The specific Flow of the river (or Qsp) reached the figure of 6,2 liters a second and per square kilometer of basin.

References

Random links: