Conservation, Nature Reserves A Winter Task: Digging out Wet Woodland Image 27 November 2018 Ian Alexander Digging out wet woodland in Gunnersbury Triangle, seen from the boardwalk bridge. The “carr” steadily silts up with mud, leaves and roots. Here the team is carefully preserving the rushes and gypsywort, removing mud to a spade’s depth. The mud will be graded to form a gentle transition from the deeper areas, which only dry out in midsummer, to the dry bank that’s covered in holly.