Leslie Hanna - Hydraulic Engineer
Model Study Videos and Photos
- Cle Elum Upwelling Model (Videos and Photos)
- Cle Elum Upstream Passage Model (Videos and Photos)
- Virgin River Fish Barrier (Videos)
- Cle Elum Intake Tower Model (Videos)
- Flow Deflectors for Mitigation of Stilling Basin Abrasion Damage HL-2010-03 - Model investigations were conducted to develop standard guidelines for the design of flow deflectors to reduce or eliminate stilling basin abrasion damage. Abrasion damage has been a long-standing problem for stilling basins throughout Reclamation for many years and a number of studies have been conducted to try to understand the problem and to come up with cost effective solutions. Through these investigations it was determined that flow deflectors can be used to mitigate abrasion damage by redirecting flow currents responsible for carrying abrasive materials into stilling basins, for Reclamation type II and type III stilling basins of standard design. In addition, field evaluations of the stilling basins at Mason Dam and Choke Canyon Dam were conducted to correlate with the models and to help refine and verify the final design.
- Virgin River Fish Barrier Physical Hydraulic Model Study HL-2012-01 - The purpose of this hydraulic report is to provide information on the physical model study to develop an effective fish barrier design, to be located on the Virgin River in an area known as Halfway Wash, approximately 16 miles upstream of Lake Mead. The model study was used to test and develop design concepts and to optimize performance as a deterrent to upstream passage of non-native species. In addition, because the river bed channel is made up of fine silt and sand, the barrier was also evaluated and optimized for energy dissipation to minimize erosion occurring immediately downstream from the structure.
Hydraulic Investigations and Laboratory Services Group
Bureau of Reclamation
Last reviewed: 03/20/13