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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/9089
Title: A multilinear discrete Nash-cascade model for stage-hydrograph routing in compound river channels
Authors: Sahoo B.
Perumal M.
Moramarco T.
Barbetta S.
Sahoo S.
Published in: Hydrological Sciences Journal
Abstract: Stream gauge-based information is the foundation for many hydrological applications in a river basin including the aquatic-habitat conservation. A simple two-parameter model for routing streamflow depth (alternatively, stream–stage) hydrographs and estimating corresponding discharge hydrographs in river channels is proposed using the multilinear approach, based on Nash-type discrete-cascade model. The applicability of this model is investigated by extending its framework to the realm of compound cross-section trapezoidal channels for both in-bank and overbank flows by using 20 flood events of the Tiber River in the Umbria region of Central Italy, and subsequently comparing the simulated results with the corresponding simulations of the HEC-RAS (Hydrologic Engineering Center–River Analysis System) hydrodynamic model and observed flow depth hydrographs. The field application, comparative study, and uncertainty and sensitivity analysis of the results demonstrate that the proposed multilinear discrete Nash-cascade stage-hydrograph (MDNS) routing model has the potential for routing floods in real-world rivers and canal irrigation systems, especially in operational mode. © 2019, © 2019 IAHS.
Citation: Hydrological Sciences Journal (2020), 65(3): 335-347
URI: https://doi.org/10.1080/02626667.2019.1699243
http://repository.iitr.ac.in/handle/123456789/9089
Issue Date: 2020
Publisher: Taylor and Francis Ltd.
Keywords: flood routing
floods
multilinear discrete-cascade
rivers and streams
stage routing
unsteady flow
ISSN: 2626667
Author Scopus IDs: 16069856000
6603838635
6602775672
12242652500
57200699227
Author Affiliations: Sahoo, B., School of Water Resources, Indian Institute of Technology Kharagpur, Kharagpur, India
Perumal, M., Department of Hydrology, Indian Institute of Technology Roorkee, Roorkee, India
Moramarco, T., National Research Council, Research Institute for Geo-Hydrological Protection (Istituto di Ricerca per la Protezione Idrogeologica - IRPI), Perugia, Italy
Barbetta, S., National Research Council, Research Institute for Geo-Hydrological Protection (Istituto di Ricerca per la Protezione Idrogeologica - IRPI), Perugia, Italy
Sahoo, S., School of Water Resources, Indian Institute of Technology Kharagpur, Kharagpur, India
Funding Details: The authors would like to thank two anonymous reviewers for their constructive criticism and suggestions in improving the technical contents of the manuscript. The authors thank the Department of Environment, Planning and Infrastructure, Umbria Region, Italy for providing the analysed river stage and surveyed cross-section data of the Tiber River.
Corresponding Author: Sahoo, B.; School of Water Resources, Indian Institute of Technology KharagpurIndia; email: bsahoo2003@yahoo.com
Appears in Collections:Journal Publications [HY]

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