Here's a couple pics I found and saved for my own future reference. I think they show what others are trying to describe. To allow for changing water levels, the crossing anchors can be done with stretching/elastic ropes or inserts with cables. There are mooring springs that can be added to chains or cables too. Hope this helps

Attached Images
anchor system.jpg tire anchor.jpg stiff arms.jpg

J Waters
Dam'd Waters Farm
2/3 ac dam'd stream pond
BG, HBG, RES, LMB, YP