sluice


sluice (http://definr.com/sluice)

     n : conduit that carries a rapid flow of water controlled by a
         sluicegate [syn: sluiceway, penstock]
     v 1: pour as if from a sluice; "An aggressive tide sluiced across
          the barrier reef." [syn: sluice down]
     2: irrigate with water from a sluice; "sluice the earth" [syn:
        flush]
     3: flow or pour from or as if from a sluice
     4: transport in or send down a sluice, as of logs
     5: draw through a sluice, as of water