water lane
/ˈwɔːtə ˌleɪn/noun
1A passage of open or unobstructed water, typically narrow or limited in width, through which watercraft can pass; specifically a shipping lane.
2Originally and chiefly Guernsey. A lane or path which closely follows a stream or small watercourse.
Origin
Early 18th century (in an earlier sense). From water + lane.