Use of 1D Unsteady HEC-RAS in a Coupled System for Compound Flood Modeling: North Carolina Case Study

Abstract

The research presented herein develops and compares an ADCIRC and ADCIRC/HEC-RAS (1D) paired model for the purpose of compound flood modeling within the Tar River and Pamlico Sound basins of North Carolina. Both the ADCIRC and 1D HEC-RAS models are capable of simulating river systems but differ in their underlying numerical formulations. A case-study comparison of each model’s ability to simulate flooding accurately and quickly in a riverine/estuarine system is investigated herein; results may serve as a valuable reference to forecasters and model developers. Individual models of the Tar River and Pamlico Sound area in North Carolina were used, and pairings of these models were devised to determine the benefits and drawbacks of using ADCIRC alone, or ADCIRC + 1D HEC-RAS, to simulate the response of the Tar River and Pamlico Sound during three test events: Hurricane Irene, Hurricane Floyd, and an unnamed April 2003 event. With increased emphasis on predicting total water levels, the results of this study can provide information for the possible development of similarly paired models for coastal river systems across the US and improve the body of knowledge about each model’s relative performance in riverine and estuarine areas.

A coordinated drainage and regulation model of urban water systems in China: A case study in Fuzhou city

“…2D hydrodynamic modeling is often used to simulate the evolution of the vertical and horizontal flow velocity distribution in areas such as urban surfaces, rivers, and lakes. Mainstream simulation software for urban flood and waterlogging disasters includes SWMM (Koc et al, 2021; Paule‐Mercado et al, 2017; Rai et al, 2018; Sun et al, 2022; Y. Yang et al, 2021; Zeng et al, 2021), HEC‐RAS (Bush et al, 2022; Shustikova et al, 2019; Tamiru & Wagari, 2022; Vozinaki et al, 2017), LISFLOOD‐FP (Z. Liu & Merwade, 2018; Wilson et al, 2007; X. Wu, Wang, et al, 2018), InfoWorks ICM (Chen et al, 2022; Hosseinzadehtalaei et al, 2021; Peng et al, 2016; Z. Zhu et al, 2016), MIKE (Bisht et al, 2016; C. Q. Li & Wang, 2012; H. L. Liu et al, 2007; M. M. Rahman et al, 2011), and FLO‐2D (Erena et al, 2018; Hsu et al, 2010; M. H. Li et al, 2011). In addition, variations in the flow fields of some key areas, including estuaries, coasts, water pumps, and sluices, are also simulated with 3D hydrodynamic modeling, while the anisotropy of fluids is fully considered.…”

“…Mainstream simulation software for urban flood and waterlogging disasters includes SWMM (Koc et al, 2021;Paule-Mercado et al, 2017;Rai et al, 2018;Sun et al, 2022;Y. Yang et al, 2021;Zeng et al, 2021), HEC-RAS (Bush et al, 2022;Shustikova et al, 2019;Tamiru & Wagari, 2022;Vozinaki et al, 2017), LISFLOOD-FP (Z. Liu & Merwade, 2018;Wilson et al, 2007;X.…”

Pemodelan Aliran Sungai Jatiroto Menggunakan Software HEC-RAS 5.0.7

“…Penelitian terdahulu menjelaskan prediksi laju aliran banjir menggunakan pemodelan aliran1D HEC-RAS menghasilkan nilai yang lebih kuat dan akurat dibandingkan model 2D LISFLOOD-FP dam TELEMAC-2D [1]. Pemodelan aliran menggunakan HEC-RAS dapat memberikan informasi terkait titik lokasi banjir berdasarkan debit banjir rancangan kala ulang tertentu [2].…”

Sea Level Rise-Induced Transition from Rare Fluvial Extremes to Chronic and Compound Floods

“…Local scale modeling and process studies of SLR impacts on compounding of extreme flood events and HTF have been understudied. Moreover, these studies have typically focused only on extreme flooding induced by tropical cyclones (TCs)/extreme coastal water level [4,21,[36][37][38][39]. Numerical modeling of HTF, on the other hand, is still under-explored in flood research.…”