channelization

noun2

1. •
   The straightening and widening of a stream or river.

   • Section 404 of the Clean Water Act does not regulate activities such as drainage, ditching, and channelization for agricultural production. — 1998
2. •
   The division of a wide-band communications channel into multiple narrow-band channels.

   • The specific frequency bands are not consistent with the current design and channelization plans for the DSCS [Defense Satellite Communications System] III. — 1979