High angle shot over water that comes out from a drain along river little ouse in Thetford forest, Norfolk, UK on a sunny day

high angle shot drain water coming out dirty water riverside river little ouse norfolk thetford forest jungle river flowing river water background water sky summer nature tree spring grass landscape park beautiful reflection outdoor little ouse river flowing flow daytime day walking outdoors clean clear dam dirty drainage environment overflow pipe plant polluted pollution runoff sewage sewer stream treatment