4 KudoZ points awarded for this answer. Comment: "Gölet seems to mean a puddle/ pond i.e. a small body of water. I grant that rezervuar means to Zeki what in English we call a toilet cistern or, less commonly, a toilet tank. But it can be used for both and is so used on several sites. I used baraj gölü. It seems The best word in this context but I freely admit I am not a native Turkish speaker. Anyhow, the signposts to Gömbe called it göl - lake. Very many thanks to all for their valuable contributions. Gölet seems to mean a puddle/ pond i.e. a small body of water. I grant that rezervuar means to Zeki what in English we call a toilet cistern or, less commonly, a toilet tank. But it ccan be used for both and is so used in several sites. I used baraj gölü. It seems The best word in this context but I freely admit I am not a native Turkish speaker. Gölet seems to mean a puddle/ pond i.e. a small body of water. I grant that rezervuar means to Zeki what in English we call a toilet cistern or, less commonly, a toilet tank. But it ccan be used for both and is so used in several sites. I used baraj gölü. It seems The best word in this context but I freely admit I am not a native Turkish speaker. we live & learn!"