debris on a river in japan

background blue blurred branch brook conservation creek debris drainage ecosystem environmental erosion exposure fast feature flooding flow flowing fluid freshwater graceful green hydrological hydropower japanese landscape level long lumber material misty motion moving natural nature outdoors people power relaxed rill river riverbank rivulet runoff scene scenery scenic serene shutter silky sleek slow smooth source splashing stream streamlined struggle tranquil tributary twig urban water watercourse waterway white withstand wood