If you want to keep the shape of the fountain I would say, add trims to its edges?
Also some fountains feature multiple levels that add to their height and make them less 'flat' (while also potentially providing more cover), maybe you could try this?[Blocked Image: https://bloximages.chicago2.vip.townnews.com/jg-tc.com/content/tncms/assets/v3/editorial/9/f0/9f0881b6-1085-5c59-a22b-fe20a2ebf1fc/4c560ce8332bf.image.jpg]