The bed (also as can be called<span> the </span>river<span> bed) is only on the </span>bottom<span> of the </span>river<span> (or another or other body of water). brackish. Beackish water is water that is much saltier than </span>river<span> water but less salty than sea water channel though. A channel is an only area that contains flowing water confined by the banks. Hope that this would helps you! =)</span>