| Section 404 of the Clean Water Act does not regulate activities such as drainage, ditching, and channelization for agricultural production. |
| Other threats include pollution, channelization and dam construction, which have blocked access to suitable spawning sites, causing fragmentation of populations. |
| Channelization and control optimized for mobile voice services. |
| The loss and degradation of spawning habitat due to water management practices, particularly the regulation of water levels and channelization, have contributed to declines in Bigmouth Buffalo in the Qu'Appelle River basin. |
| Riverine habitats have been extensively modified by damming and by channelization, the latter being the practice of straightening rivers by forcing them to flow along predetermined channels. |
| River regulation through the creation of dams and reservoirs, as well as channelization, can degrade and destroy dipper habitat. |
