Modeling Unsteady and Steady 1-D Hydrodynamics Under Different Hydraulic Conceptualizations: Model/Software Development&amp;nbsp;and Case Studies

Júnior, Marcus Nóbrega Gomes; Rápalo, Luis Miguel Castillo; Oliveira, Paulo Tarso Sanches de; Giacomoni, Marcio; Lago, César Ambrogi Ferreira do; Mendiondo, Eduardo Mário

doi:10.2139/ssrn.4358326

Cited by 2 publications

(2 citation statements)

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“…; and b) illustration of unsteady flow pervasiveness The investigation of the nonuniform and unsteady flows has been central for theoretical, laboratory, and in-situ explorations since its substantiation more than 150 years ago (Hager et al, 2019). The knowledge concerning these flows is summarized in numerous textbooks (e.g., Chow, 1959;Henderson, 1966;Ponce, 1989) and published research covering the topic from fluid dynamics, applied hydraulics or hydrology perspectives (e.g., Moots, 1938;Nezu & Nakagawa, 1995: Dottori et al, 2009Mrokowska et al, 2015;Fenton, 2019;Dykstra & Dzwonkowski, 2020;Marcus et al, 2023). The current mathematical framework for the analysis of this type of flows is provided by the Saint-Venant equations (Saint-Venant, 1871).…”

Section: Introductionmentioning

confidence: 99%

Decoding the Hysteretic Behavior of Hydraulic Variables in Lowland Rivers with Multivariate Monitoring Approaches

Muste,

Kim,

Kim

et al. 2024

Preprint

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This paper demonstrates that the multivariate monitoring methods are capable to underpin the systematic investigation of the hysteretic behavior occurring during gradually-varied flows. For this purpose, we present simultaneous measurements of stage, index velocity, and free-surface slope acquired continuously with high-frequency sampling instruments deployed at several river gauging sites exposed to a range of storm magnitudes. The experimental evidence reveals intrinsic features of unsteady open-channel flow mechanics that are hinted by pertinent governing equations but rarely substantiated with in-situ measurements. The illustrations are intentionally made for fluvial waves propagating at sites located in lowland areas where the relationships among flow variables are most likely displaying hysteretic loops and phasing in the hydraulic variable progression. The set of presented measurements highlights that: a) the hysteretic behavior is apparent in both time-independent and time-dependent graphical representations of any two of the hydraulic variables; b) the severity of the hysteresis is commensurate with the geomorphic, hydraulic, and hydrological characteristics of the measurement site; and c) there is a pressing need for changing the flow paradigms currently used in tracking flow variables during gradually-varied flows. Also discussed are research needs associated with flow hysteresis for advancing the understanding of the mechanisms underlying the movement and storage of water in the lowland river environments as well as for increasing the accuracy of streamflow monitoring, modeling, and forecasting.

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Section: Introductionmentioning

confidence: 99%

Decoding the Hysteretic Behavior of Hydraulic Variables in Lowland Rivers with Multivariate Monitoring Approaches

Muste,

Kim,

Kim

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…In addition, we compared the HydroPol2D model with the HEC-RAS 2D full-momentum Pardiso fully implicit numerical solver Gomes Jr et al, 2023d) to check the ability of the model to predict hydrographs at the outlet. In this analysis, we simulate the same design event but without infiltration and the initial abstraction effect.…”

Section: Parameter Estimations and Local Sensitivity Analysismentioning

confidence: 99%

Advances in open source hydroinformatics for flood modeling and disaster education

Gomes Junior

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These almost 4 years have made me face so many varied, complex, and challenging things that I never thought I would be able to face. The pursuit of a doctorate degree made me a better person, not only through the knowledge that I received but also by the life lessons that this journey taught me. By constantly looking for new challenges, methods, visualization tools or even trying to solve sometimes never solved problems, I think my life will never be the same. The concept of what is something difficult has changed. Pursuing a Ph.D. helped me pursue a better life filled with desire, joy, and willingness to become a better person.There must be someone somewhere who gave me the strength and put me in the right place and at the right time multiple times. I thank God for that. If you asked me by the time I finished my undergraduate that I would be able to have a Master's degree and eventually two Ph.D.s, I would say that it was impossible. For God, nothing is impossible if you believe in him and have an open mind enough to face the unknown path under his guidance, even if you are scared.Several important people gave me the tools, strength, and support to cope with such difficult times, especially during the 2020-2022 pandemic. I would like to give a more than special thanks to all the support given by Eudiana Sousa, whom I personally admire and think was fundamental. I have learned a lot from you. I would also like to thank my parents, Edeliar T. Saraiva, and Marcus N. Gomes, my brother Eduardo. T. N. Gomes, and my sister, Ana C. Gomes. Without your support, I would not have been able to.Without agency funding, this research would be impossible. I greatly appreciate the support received from CNPQ, CAPES, FAPESP, and the San Antonio River Authority to partially fund my research. It is relatively unfair to only thank a couple of friends and colleagues who helped me.Therefore, I thank all PPGSHS and CPG, especially Sá, Rose, Tatiana, and César. I also thank the Wadi Lab, and all friends and colleagues that helped during this process. I had excellent talks with professors from USP and UTSA, also during conferences at AGU, EWRI, and SBRH, or even talks during short courses with outstanding professors that inspired me to believe that we can develop highlevel technology in Brazil. However, I need to be specific with some estimated friends and colleagues.My gratitude is infinite toward my supervisors, Dr. Eduardo M. Mendiondo from USP and Dr. Marcio H. Giacomoni from UTSA. Mario always believed in me without any proof at first. He simply gambled in my potential and showed me that somehow he knew more about me than I at the beginning of my academic career. Sometimes we just need someone to push us forward, someone who trusts us and gives us confidence to try to perform our best work. Besides the academia, Mario is a friend, someone that I have the pleasure to say that I can count on not only for my formal education, but also for life in general. Thank you, Mario.Another absolutely great example of guidance and supervision is w...

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Modeling Unsteady and Steady 1-D Hydrodynamics Under Different Hydraulic Conceptualizations: Model/Software Development and Case Studies

Cited by 2 publications

References 0 publications

Decoding the Hysteretic Behavior of Hydraulic Variables in Lowland Rivers with Multivariate Monitoring Approaches

Decoding the Hysteretic Behavior of Hydraulic Variables in Lowland Rivers with Multivariate Monitoring Approaches

Advances in open source hydroinformatics for flood modeling and disaster education

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