canal or navigation system

also anavigationwhen asslack basin building calledlevelsa canal canals cases conveyance createreservoirsof current dams drainage engineered flow have humanmadechannels increase its itsvalley just known lengthen levels leverages locks low most navigation ofdamsandlocksthat often orartificial ornavigations parallels part referred reservoirs resources river series servicewater shares slack speed staying stretches system transportvehiclesin water waters waterways will works