Hydraulic Engineering Center (HEC) is situated in Davis, California, USA. He teaches the NHI HEC-RAS course nationwide and has contributed to the HEC-RAS Hydraulic Reference Manual.HEC-RAS stands for Hydraulic Engineering Center, River Analysis system, as the name suggests, Hydraulic Engineering Center (HEC) has developed this River Analysis System (RAS). John Hunt, PE, is manager of the river engineering group in Ayres Associates’ Fort Collins, Colorado, office. The three-day class teaches the basic skills needed to develop and run a 1-dimensional HEC-RAS model, including the analysis of bridges and culverts. Engineers at Ayres Associates have been teaching the NHI’s course, “One-Dimensional Modeling of River Encroachments with HEC-RAS,” to state departments of transportation and others since 2002. Many providers offer training on HEC-RAS, one being the National Highway Institute (NHI). Professionals using the program should seek formal training to develop the skills necessary to get accurate results. For example, small inaccuracies in the water surface elevation upstream of the bridge can lead to important deficiencies in the design of a new bridge. Inaccuracies that may seem minor can lead to significant problems in flood analysis or infrastructure design. Therefore, it requires careful data entry and review and validation of the results to avoid inaccuracy in the water surface profile. On a cautionary note, HEC-RAS is a robust program that will run even if the data is poor. HEC-RAS Training Necessary for Accurate Results Below: The HEC-RAS model used in the design of the repairs. The program allows engineers to compare existing conditions to proposed conditions once design changes are made, whether that be changes to a bridge structure or infrastructure on a streambank, for example.Ībove: Completed post-flood roadway repairs at County Road 29 in Larimer County near the Loveland Water Treatment Plant. The model also allows the engineer to estimate the flow depth, velocity, and shear stress values, along with other important variables necessary for scour calculations. The result of all this data and the calculations by the program is a water surface profile, which indicates the water surface elevation at points along the river or stream for a given flood. Finally, the model analyzes data on flow rates for varying flood severity levels, gathered from existing studies and other analyses. Additional data includes the roughness of the terrain in question (such as whether water will be flowing through trees versus grass). When using HEC-RAS, engineers gather cross-sectional ground data of rivers and floodplains developed from land surveys and aerial mapping to put into the model.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |