Charcoal (river)
The Fusain is a French river running in the departments French Loiret and of Seine-et-Marne. It is an affluent of the Loing out of left bank, therefore a tributary of a tributary of the the Seine.
Geography
The Charcoal occurs on the level of the commune of Batilly-in-Gâtinais in the Département of Loiret, small town located between the forest of Orleans (6 kilometers in the west) and the small town of Beaune-the-Rolande (3 kilometers in the east). It has an head office active of the west towards the east, then the North-East. He traverses thus the Western part of the Gâtinais. He throws himself in the Loing in the north of Castle-Landon, in Seine-et-Marne.
Common crossings
; In Loiret:
; In the Seine-et-Marne:
- Beaumont-of-Gâtinais the
; In Loiret:
- Bordeaux-in-Gâtinais ~ Seal-of-Gâtinais the ~ Courtempierre ~ Préfontaines
; In the Seine-et-Marne:
Affluents
-
Maurepas
- Small Charcoal
Hydrology
The flow of the Charcoal was observed for one 16 years period (1967-1982), with Courtempierre, locality of the Département of Loiret, located at ten kilometers of its confluence with the Loing with Castle-Landon. The catchment area of the river is there of 375 km ², that is to say more than 90% of the totality of this last which makes 400 km ² more or less.
The interannual medium flow or module of the river with Courtempierre is of 1,34 m ³ a second.
The Charcoal presents seasonal fluctuations of flow extremely moderate. The high waters are held in winter and are characterized by an oscillating average monthly flow between 2,00 and 2,48 m ³ a second, from January to March included (maximum very Net in February). As of April the flow drops very gradually to the low waters of be-autumn which take place from July to October, with a fall of the monthly medium flow going until 0,662 m ³ in September (662 liters a second), which is very acceptable and remains even comfortable.
However, the VCN3 can fall until 0,084 m ³, in the event of dry period quinquennial, that is to say 84 liters a second, which becomes severe. The VCN3 is the past minimal quantity or minimal flow over three days consecutive.
As for the risings, they are moderate in the context of the basin of Loing. The QIX 2 and QIX 5 or calculated flows of biennial and quinquennial rising are worth respectively 9,5 and 13 m ³. The QIX 10 or calculated flow of decennial rising is worth 16 m ³ a second, while the QIX 20 is assembled to 19 m ³. Finally the QIX 50 was not calculated fault of duration of sufficient observation to calculate it validly (see note). The recorded maximum instantaneous flow with Courtempierre was of 16,6 m ³ a second on February 1st, 1978, while the value maximum day laborer was of 15,6 m ³ a second on January 12th, 1982. By comparing the first of these figures on a QIX scale of the river, it appears that this rising was of a decennial nature and thus by no means exceptional. One can consider that it is intended to repeat itself every 10 years on average.
The Charcoal is a river very little abundant traversing an area of France little sprinkled on a largely permeable ground. The Lame of water past in the basin of the Charcoal is of 113 millimetres annually, which is poor, very definitely lower than the overall average of France, but also than that of the whole of the catchment area of the Loing (148 millimetres). The specific Débit (or Qsp) falls consequently to weak 3,6 liters a second and per square kilometer of basin.
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