EVENT DETAILS:
Topic: Rainfall-Runoff Modeling Using HEC-RAS
Date and Time: Friday, April 1, 2022 at 1:00PM
Presenter: Michael Horst, PhD, PE
Cost: Free for NJAFM Members
Length of Presentation: 1 Hour + 15 Minutes for Questions
Continuing Education Credit: 1.0 Credit for the CFM and 1.0 PDH Credit for the NJPE for the one-hour webinar. Continuing Education Credit is available only to those who are current NJAFM members.
Date and Time: Friday, April 1, 2022 at 1:00PM
Presenter: Michael Horst, PhD, PE
Cost: Free for NJAFM Members
Length of Presentation: 1 Hour + 15 Minutes for Questions
Continuing Education Credit: 1.0 Credit for the CFM and 1.0 PDH Credit for the NJPE for the one-hour webinar. Continuing Education Credit is available only to those who are current NJAFM members.
Rainfall-Runoff Modeling Using HEC-RAS
Rainfall-runoff modeling is commonly employed by hydrologic engineers for the purpose of determining a hydrograph. Historically, hydrologic methods utilizing unit hydrograph theory have been used to obtain results. Recent advancements in both computing power and accessibility to high resolution digital elevation models has made 2D hydraulic rainfall-runoff modeling feasible. Version 6 of the Hydrologic Engineering Center’s River Analysis System allows users to input a precipitation boundary condition used in combination with both Curve number and Land use layers for the purpose of modeling the rainfall-runoff relationship over a 2D terrain using hydrodynamic equations. The goal of this study was to simulate the rainfall-runoff relationship using both a hydrologic and hydraulic method and then compare results to actual values recorded at a flow gaging station. A total of 38 watersheds with 59 historical storm events were analyzed for this study. Analysis showed that neither technique produced consistently accurate results when compared to historical data. The simulations produced average (peak flow) percent errors of 100% (hydraulic) and 161% (hydrologic). Twenty-eight out of 59 hydraulic simulations and 41 out of 59 hydrologic simulations overestimated the peak flow. In general, results tended to improve for simulations involving larger watershed areas and larger precipitation events.
Presenter Bio:
Michael Horst is an Associate Professor within the Department of Civil Engineering at The College of New Jersey. He has been at TCNJ since 2006. His responsibilities at the College include teaching courses related to Water Resources and Environmental engineering, as well as conducting research in the area of applied hydrologic engineering. Prior to joining TCNJ he completed a 2 year Post-Doc at Villanova University where he focused on Stormwater Management topics specifically related to BMPs. Before that he completed his Bachelors, Masters, and PhD all at Penn State University focusing on applied Hydraulics and Hydrology with an emphasis on sediment transport and bridge scour topics. He is a licensed engineer in Pennsylvania and stays active in the community through various consulting projects as well as by conducting continuing education courses focusing on both the HEC-HMS and HEC-RAS programs.
Presenter Bio:
Michael Horst is an Associate Professor within the Department of Civil Engineering at The College of New Jersey. He has been at TCNJ since 2006. His responsibilities at the College include teaching courses related to Water Resources and Environmental engineering, as well as conducting research in the area of applied hydrologic engineering. Prior to joining TCNJ he completed a 2 year Post-Doc at Villanova University where he focused on Stormwater Management topics specifically related to BMPs. Before that he completed his Bachelors, Masters, and PhD all at Penn State University focusing on applied Hydraulics and Hydrology with an emphasis on sediment transport and bridge scour topics. He is a licensed engineer in Pennsylvania and stays active in the community through various consulting projects as well as by conducting continuing education courses focusing on both the HEC-HMS and HEC-RAS programs.
REQUIREMENTS:
Those attending this and future NJAFM webinars who wish to receive a Continuing Education Credit (CEC) for CFM and/or Professional Development Hour (PDH) for NJPE must meet two requirements:
- Active NJAFM Member
- Completion of course evaluation form