summer clouds river reeds trees

banks bed biosphere boreal braided brook canyons channel channels chemistry coniferous cover creek cycle downpour ecology ecosystem effluent erosion evergreen flood floodwaters flooding floodplain ford forest forests freshwater garden gorges groundwater hydrological land limnology natural nulla plantations potamology rainfall rill river riverbed rivulet shower snow stream subarctic summer summertree summertime temperate trees vegetation watercourse