IMIS

• Gates controlling water level and flow in rivers (even those not navigable) and waterways (lifting gate, tilting gate, radial gate, sector, etc.; designed in one piece or with an upper flap). These are movable weirs.
  
  

• Gates controlling water level and flow in estuaries with regard to high tides and storms (lifting gate, articulated, tilting, rolling, floating, sliding, etc.). These are flood barriers.
  

• List of the recent movable weir and barrier projects (see project reviews), presentation of their concepts and innovations, and the driving forces considered for selecting these particular designs (Section 2.1).
  
  

• A terminology review of the technical terms and names used to define weirs and barriers (Section 2.2).
  
  

• Design procedure for the design of weirs and barriers (Section 3).
  
  

• A review of the various multi-criteria assessment approaches that can be used to select the most relevant designs (Section 4). List of criteria for weirs and barriers, are proposed.
  
  

• Technical considerations including environmental, economic and safety aspects, for design, construction, maintenance and operation (Section 5).
  
  

• Structural considerations on various gate-types with an advantage-disadvantage comparison (Section 5.1).
  
  

• Technical background required to perform hydraulic and flow analysis of various gate-types (Section 5.2).
  
  

• Interaction between foundation and weir-barrier structure (Section 5.3).
  
  

• Control procedures of the gate operations and their maintenance (Section 5.4).
  
  

• Survey of the temporary closure systems (e.g. bulkheads) used for inspection and maintenance (Section 5.5).
  
  

• State-of-the-art of the risk-based design methods. With applications to navigation weirs and flood barriers (Section 5.6).
  
  

• Interactions between the technical aspects of a weir/ barrier design with environmental and aesthetic considerations (Section 5.7).
  
  

• Procedure to assess the global construction cost of a weir at the design stage (Section 5.8).
  
  

• Design assessment tools for preliminary and detailed design stages (Section 6 and Annex A).
  
  

• Prefabrication techniques (Section 7).
  
  

• Codes, rules and standards: at national and international level; including the use of the semi-probabilistic Eurocode format (Section 8).
  
  

• An extensive list of relevant technical books, web sites, and guidelines (Section 10).

The present hardcopy WG-26 report is a reduced version of the full report, which is available on the companion cd-rom, attached to this PIANC hardcopy report (Directory /A2- report WG-26 (Extended version).

The cd-rom includes