There are pathways that run along each side of the water that's in the middle.
There is water that goes up the middle of the walkways that are on both sides.
1) There are pathways that run along each side of the water that's in the middle.
「真ん中に水路があり、その両側に沿って遊歩道がある。」
pathway「歩く道・通路」
run along 「沿う」
2) There is water that goes up the middle of the walkways that are on both sides.
「両側の遊歩道の真ん中に水路がある。」
walkway「歩道・通路」
ご参考になれば幸いです！
日本 
