Classification value defining the type of WatercourseLink. WatercourseFormValue A manmade watercourse originally created for inland navigation where the refined classification of narrowCanal or wideCanal has not be assigned. canal canal A manmade watercourse whose primary purpose is the removal of excess water from a localisedn area. drain drain Watercourse flows over the foreshore i.e. between mean high water (springs) high and mean low water (springs). Primarily used only where provenance is OS-line. foreshore foreshore A river or stream that is not influenced by normal tidal action. inlandRiver inlandRiver Lake, loch or reservoir lake lake An enclosure in a canal or navigable river with a movable gate and sluices at either end. Designed to allow vessels to move between sections of canal or navigable river at different levels by filling or draining the enclosure. lockOrFlightOfLocks lockOrFlightOfLocks An area of ground that is predominantly waterlogged by freshwater throughout the year with no identifiable specific alignment for the flow. For the water network they are captured only where water flows into and out of the marsh and connects to other watercourse links. marsh marsh An area of non-tidal water used for storing water that may be used for irrigation, water supply, power generation or flood control that has been created artificially either fully or in part. reservoir reservoir Estuary or open sea sea sea Tidal river or stream (i.e. below Normal Tidal Limit) tidalRiver tidalRiver Manmade watercourse whose primary purpose is for water transfer transfer transfer An enclosure in a canal or navigable river with a movable gate and sluices at either end. Designed to allow vessels to move between sections of canal or navigable river at different levels by filling or draining the enclosure. lock lock A manmade watercourse originally created for inland navigation that is defined by the Canal and River Trust as a narrow canal. narrowCanal narrowCanal A manmade watercourse originally created for inland navigation that is defined by the Canal and River Trust as a wide canal. wideCanal wideCanal