Amarah is on the Tigris river i think that's where they've built this...i'm not quite sure if that can be it? looks like its beside a large lake or sea.... there's a seasonal marsh 10km to the east of amara, but I'm not sure if this is it?
you're right. the pool here looks different and larger....^^ that photo is definitely not from amara beach resort in turkey...have a look at their gallery...