Turbidity Curtain Frequently Asked Questions
Are turbidity curtains in stock and ready to ship?
Account for lead times of a few weeks to produce a curtain in the factory. Most curtains will be custom and not off the shelf.
How much curtain do I need for my project?
Account for the anchor rodes. Best anchorage for turbidity curtains is a 5:1 slope. In 10′ of water you will have 50′ of anchor lines on one or both side of the curtain. Possibly into the work area.
How important are water conditions?
Water conditions (wind, wave height, flow rate) are important to ensuring proper anchorage is being used. Account for pull from intake structures, ice, debris, and wake from vessels.
How are deeper curtains affected by tidal flow?
The deeper the curtain, the calmer the conditions need to be. A curtain 30′ deep in 2 knot tidal flow will only have an effective depth of 13′ and will be difficult to keep in place even with heavy anchoring.
How deep should my curtain be?
Curtains should not touch the bottom. Flow of water is not going to be stopped by a fabric curtain. You cannot sand bag or add additional weight to the bottom of the curtain to keep it down. This will tear the curtain. Also, in calm situations, sediment can build up on the curtain making it impossible to retreive when the work is finished. Curtains will perform better the more parallel they are to the flow.