This paper describes a new framework-type diversion canal. It wasfirst applied to debris flow control in Heishui county in Sichuan provin-ce. The characteristics of the structure are as follows: connecting thewall and bottom ribs with the foundation and top walls of the canal tomake up a framework. At the point of stress concentration between thewall and bottom of the wall of the canal

cast corners are used for rein-forcement. At the downstream of the bottom ribs

raising the bottom by30-50cm so as to retain a layer of debris flow for energy dissipation andbottom protection. Framework-type diversion canal for debris flow canprevent: 1) being scoured of canal bottom; 2) being undercut of canal walls; 3) damage to the stress concentration points between the wall andbottom of the canal. It also ensures the safty of canal

repair and management are easy.