What is the low-cost safe solution for creating an estuary in sea?

Question

Does anyone have a low-cost and safe solution for creating an estuary in sea for a river for storing blackish water for treatment? The treated water would be used in a Newly Developed Industrial City of an area of around 30,000 acres.
The river delta had already created an island which is blocking about 60% length of the open sea. Only 40% area is to be embanked.

Jos de Bijl · Answer

Das, Using ​natural ​processes (​creating an ​estuary) for ​treating ​blackish water ​is a promising ​idea. It ​creates the ​opportunity to ​combine black ​water treatment,​ with nature ​development and ​recreation. And ​therefore it ​can make your ​solution ​cheaper and ​more valuable. ​The river can ​help building ​the estuary for ​you, just as it ​already made an ​Island by ​itself. We (www.​stroming.nl) ​can help you to ​look at the ​opportunities ​to create an ​estuary in ​delta. ​
Please contact ​me for more ​information (​jdebijl@gmail.​com)

Arturo Constante · Answer

Hi Das, for brackish water you ever need less energy to treat it than seawater if we speak about conventional natural water qualities, but some times not because organic material charge; all depends.
But you should consider a wastewater re-purification system of very low operating costs, 95% efficiency and zero emissions between another sustainable and profitable advantages.
Regards

Tony Jones · Answer

Das,   You might consider a fabric-liquid filled dams to create an embayment.  Let me know if you want a referral.

ted GARDNER · Answer

@ Have a look at the Marina Barrage in Singapore and similar types of solutions in Hong Kong
 
Cheers.....ted gardner

Tom Headley · Answer

Tapas Das . Do you mean "brackish" or "blackish"? A big difference which may lead to confusion in the answers you receive.
If you need advice on creating a brackish wetland, mangroves etc; I can help. But I'm not sure that is what you are looking for?
Tom

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