Are turbidity curtains in stock and ready to ship?
Please contact us for current availability.
Account for lead times of a few weeks to fabricate a curtain in the factory. Most curtains are customs made and may not be on the shelf.
How much curtain do I require for my project?
The anchorage ropes must be accounted for. The best anchorage for a turbidity curtain is a 6:1 slope, minimum. In 8 feet of water, you will require 48 feet of anchor lines on one or both sides of the curtain.
The demand on the curtain may require you to have multiples runs of curtains depending on the amount of silt in the water.
How important are the water conditions?
Water conditions, such as flow rate, velocity, wave height, wind, and boat wake are all important factors used to make sure enough of the proper anchorage is utilized.
Pull from intake structures, push from effluent structures, debris such as tree limbs and logs, ice flow, and wake from vessels all must be accounted for.
How are deeper curtains affected by tidal flow and change?
The deeper the curtain, the calmer the water conditions must be. A curtain 25- feet deep in a 2- foot tidal flow will only be effective down to 11 feet in depth and it will be difficult to keep the curtain in place even with additional anchoring. The curtain should not the touch the bottom. The flow of the water is not going to be stopped by the fabric curtain. If you add additional ballast to the bottom of the curtain to keep it down, the curtain will tear. In calm areas, sediment can build up on the bottom edge of the curtain which will make it impossible to retrieve the curtain without damage when the work has been completed.
The curtains work best when they are positioned parallel to the flow.