File:Débit réservé.jpg
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English: There are simple systems to ensure a leakage rate proportional to stream flow or water level. The height and angle of the triangle hole regulate the flow, between a minimum and a maximum determined by the manager of the water. Here, in case of flood, the water passes over the dam, and in case of drought, a small reserve of water is stored upstream. If the triangle down below, a mimimum flow would be maintained, but at the risk of draining the upstream portion of the system.
It is a type of small dam useful in alternatives systems of management of stormwater in urban area. There slows stormwater - in waterproof areas - where rain water may abnormaly help swell the flood .. Français : Il existe des systèmes simples pour assurer un débit de fuite ou débit réservé proportionnel à la hauteur d'eau. La hauteur et l'angle du triangle d'ouverture règlent le débit ; entre un minimum et un maximum déterminé par le gestionnaire de l'eau. Ici, en cas de crue, l'eau passe au dessus du barrage, et en cas de sécheresse, une petite réserve d'eau est conservée en amont. Si le triangle descendait plus bas, un débit mimimum serait conservé, mais au risque d'assécher la partie amont du système. C'est un type de petit barrage utile dans les système de gestion alternative des eaux pluviales. Il y freine les eaux pluviales qui - en zone imperméabilisées - peuvent contribuer à grossir les crues. |
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| Source | Own work |
| Author | Lamiot |
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| current | 21:52, 5 October 2010 | | 1,170 × 706 (61 KB) | Lamiot (talk | contribs) | {{Information |Description={{en|1=There are simple systems to ensure a leakage rate proportional to stream flow or water level. The height and angle of the triangle hole regulate the flow, between a minimum and a maximum determined by the manager of the w |
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