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<br />e <br /> <br />e <br /> <br />e <br /> <br />DRAINAGE CRITERIA MANUAL (V. 2) <br /> <br />HYDRAULIC STRUCTURES <br /> <br />1.0 USE OF STRUCTURES IN DRAINAGE <br /> <br />1.1 Introduction <br /> <br />Hydraulic structures are used to guide and control water flow velocities, directions and depths, the <br />elevation and slope of the streambed, the general configuration of the waterway, and its stability and <br />maintenance characteristics. <br /> <br />Careful and thorough hydraulic engineering is justified for hydraulic structures. Consideration of <br />environmental, ecological. and public safety objectives should be integrated with hydraulic engineering <br />design. The proper application of hydraulic structures can reduce initial and future maintenance costs by <br />managing the character of the flow to fit the environmental and project needs. <br /> <br /> <br />Photograph HS-1 <br /> <br />Denver's Harvard Gulch Flood Control Project introduced the baffle chute drop structure to urban flood <br />control in 1966. Vegetation and time have made the structure part of the city's urban poetry. <br /> <br />Hydraulic structures include transitions, constrictions, channel drops, low-flow checks, energy dissipators, <br />bridges, bends, and confluences. Their shape. size, and other features vary widely for different projects, <br />depending upon the discharge and the function to be accomplished. Hydraulic design procedures must <br />govern the final design of all structures. These may include model testing for larger structures when the <br /> <br />06/2001 <br />Urban Drainage & Flood Control District <br /> <br />HS-1 <br />