Speakers: Kiarash Shirmahi and Pavel Shrestha
When: Friday, May 9th, 11:00AM
Where: KH A445 (Lincoln), PKI 160 (Omaha)
Kiarash Shirmahi: Energy Dissipation Optimization for Circular Culverts
Abstract: Enhancing the design of every dissipation systems at culvert outlets is essential to reduce water exit speeds, safeguard downstream structures, and minimize erosion risks. This study focuses on developing a more effective staggered weir design for circular culverts by systematically testing different flow scenarios and baffle arrangements.
Pavel Shrestha: Characterizing Sediment and Identifying Sources in Nebraska Roadway Runoff
Abstract: Stormwater runoff from roadways and associated watersheds is a significant source of sediment pollution, posing harmful impacts on natural streams and aquatic ecosystems. However, sediment runoff data from Nebraska roadway systems are limited and poorly understood, creating challenges for designing effective best management practices (BMPs). This study aims to characterize total suspended solids (TSS) and particle size distribution (PSD) by analyzing stormwater samples collected from sites representative of typical Nebraska roadway conditions, and to assess site-specific factors influencing sediment delivery. Results will be used to develop practical recommendations for BMP design by estimating sediment loading more accurately.