The Collaborative International Dictionary of English v.0.48:

Canalization \Ca*nal`i*za"tion\, n.
   Construction of, or furnishing with, a canal or canals. [R.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

canalization
    n 1: the production of a canal or a conversion to canals [syn:
         canalization, canalisation]
    2: management through specified channels of communication [syn:
       channelization, channelisation, canalization,
       canalisation]