Rivière Trenche
| Rivière Trenche | ||
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| Data | ||
| location | Saguenay – Lac-Saint-Jean , Mauricie in Québec (Canada) | |
| River system | Saint Lawrence River | |
| Drain over | Rivière Saint-Maurice → Saint Lawrence River → Atlantic Ocean | |
| source | 90 km west of Roberval 48 ° 48 ′ 56 ″ N , 73 ° 23 ′ 5 ″ W |
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| Source height | approx. 630 m | |
| muzzle |
Lac Tourouvre Coordinates: 47 ° 49 '48 " N , 72 ° 51' 40" W 47 ° 49 '48 " N , 72 ° 51' 40" W. |
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| Mouth height | 236 m | |
| Height difference | approx. 394 m | |
| Bottom slope | approx. 2.6 ‰ | |
| length | approx. 150 km | |
| Left tributaries | Rivière de la Tête à l'Ours , Rivière Trenche Est , Rivière Raimbault | |
| Right tributaries | Rivière Trenche Sud | |
| Flowing lakes | Étang Gémil , Lac du Chapeau | |
| Reservoirs flowed through | Lac Trenche | |
 Location of the Rivière Trenche in the catchment area of the Rivière Saint-Maurice |
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The Rivière Trenche is a left tributary of the Rivière Saint-Maurice in the Canadian province of Québec .
The Rivière Trenche has its source 90 km west of Roberval , located on Lac Saint-Jean , in the Laurentine Mountains . Initially, it flows through the small lakes Étang Gémil and Lac du Chapeau in a southerly direction and reaches Lake Trenche , at the outlet of which is the 1.5 m high and 53 m wide Barrage du Lac-Trenche , built in 1960 . The Rivière Trenche flows a piece in a south-southeast direction. The tributaries Rivière Trenche Sud flow into it from the right, as well as Rivière de la Tête à l'Ours , Rivière Trenche Est and Rivière Raimbault from the left. It now flows in a southerly direction and after a total of 150 km reaches the north bank of Lac Tourouvre , a reservoir on the Rivière Saint-Maurice.