Development of a numerical model for braided river morphology and vegetation evolution with application to the Lower Waitaki River (Aotearoa – New Zealand)

Stecca, Guglielmo; Fedrizzi, Davide; Measures, Richard; Hicks, D. Murray; Hoyle, Jo; Zolezzi, Guido

doi:10.1016/j.advwatres.2022.104236

Cited by 9 publications

(35 citation statements)

References 53 publications

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“…Preliminarily, we remark that in this work braided channel evolution is modeled using a mathematical model and numerical solution that are completely deterministic. In detail, the underlying system of governing equations (Equations 1-4 in Stecca et al [2022], see also the electronic supplement to this article) is hyperbolic (Cordier et al, 2011) and thus, with appropriate initial and boundary conditions, can be proven to form a well-posed initialvalue problem that admits a unique solution. Also, the numerical solver employed for this work is deterministic in that two model runs conducted with perfectly identical setups will produce identical results.…”

Section: Results: Display Of Deterministic Chaosmentioning

confidence: 99%

“…Moreover, for realistic applications, featuring an unsteady flow regime and in‐channel vegetation (e.g., Stecca et al., 2022), the time frame needed for homogeneity is likely to increase even further. In particular, the effects of vegetation are to locally increase roughness, decrease sediment transport, and strengthen banks (Gurnell, 2014), which collectively introduce a localized forcing that increases the degree of inhomogeneity.…”

Section: Discussionmentioning

confidence: 99%

“…We carried out the simulations of this paper using the numerical model GIAMT2D‐veg (Stecca et al., 2022). This model was originally developed to study vegetated braided channels.…”

Section: Methodsmentioning

confidence: 99%

“…The two‐dimensional numerical morphodynamic model GIAMT2D‐veg used to produce the simulation runs of this paper is described in Stecca et al. (2022).…”

Section: Data Availability Statementmentioning

confidence: 99%

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Numerical Simulations of Confined Braided River Morphodynamics: Display of Deterministic Chaos and Characterization Through Turbulence Theory

Stecca

Hicks

2022

JGR Earth Surface

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In a seminal paper, Paola (1996) put forward an analogy between river braiding and fluid turbulence. He observed that both fluid turbulence and river braiding form systems that: (a) are intrinsically unpredictable in their exact configurations in the long term despite being governed by deterministic laws that are reasonably well known; (b) feature a hierarchy of scales; and, (c) while they can be macroscopically stationary, feature transient events which are critical to the system's average behavior. From these observations, he proceeded to develop a one-dimensional analytical model for hydraulic geometry, shear stress and sediment transport in braided channels based on an adaptation of the Reynolds decomposition used in the turbulence theory, which aligned reasonably well with field data.To our knowledge, this turbulence analogy has not been developed or used further to interpret braiding. Yet, this framework could provide more, potentially ground-breaking insight into the nature and functioning of braiding by answering fundamental questions such as the existence of one (or multiple) scaling relations; the existence of a hierarchical structure where features of different sizes can be interpreted as being functionally different; the

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Section: Results: Display Of Deterministic Chaosmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…We carried out the simulations of this paper using the numerical model GIAMT2D‐veg (Stecca et al., 2022). This model was originally developed to study vegetated braided channels.…”

Section: Methodsmentioning

confidence: 99%

“…The two‐dimensional numerical morphodynamic model GIAMT2D‐veg used to produce the simulation runs of this paper is described in Stecca et al. (2022).…”

Section: Data Availability Statementmentioning

confidence: 99%

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Numerical Simulations of Confined Braided River Morphodynamics: Display of Deterministic Chaos and Characterization Through Turbulence Theory

Stecca

Hicks

2022

JGR Earth Surface

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“…1-100 km). They provide insights on the role of vegetation in modulating alternate bar morphodynamics [11][12][13][14], on the impacts of different root systems [15], on braided morphodynamics [16], and on long-term biogeomorphic succession [17]. They include the effect of vegetation on flow resistance and shear stress, as well as the scouring and deposition processes on vegetation survival and establishment.…”

Section: Motivation and Significancementioning

confidence: 99%

BASEveg: A python package to model riparian vegetation dynamics coupled with river morphodynamics

Caponi¹,

Vetsch²,

Vanzo³

2023

SoftwareX

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Plants and river morphodynamics: The emergence of fluvial biogeomorphology

Gurnell,

Bertoldi

2024

River Research & Apps

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In this article, we track the evolution of fluvial biogeomorphology from the middle of the 20th century to the present. We consider the emergence of fluvial biogeomorphology as an interdisciplinary research area that integrates knowledge drawn primarily from fluvial geomorphology and plant ecology, but with inputs from hydrology and landscape ecology. We start by assembling evidence for the emergence of the field of fluvial biogeomorphology with a keyword search of the Web of Science and a detailed analysis of papers published in two scientific journals: a geomorphology journal—Earth Surface Processes and Landforms; a multidisciplinary river science journal—River Research and Applications. Based on this evidence, we identify three distinct time periods in the development of fluvial biogeomorphology: the ‘early years’ before 1990; the transitional decade of the 1990s; and the period of rapid expansion and diversification in themes, methods and investigation scales since 2000. Because the literature is vast, we can only summarize developments in each of these time periods, but we refer to recent in‐depth reviews and conceptual perspectives on relevant topics. Thus, rather than a full and deep review, we present an annotated bibliographic overview of the development of fluvial biogeomorphology, whereby the text describes broad trends but is supported by tables of citations that can deliver greater detail. We end with a brief consideration of likely future developments.

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Development of a numerical model for braided river morphology and vegetation evolution with application to the Lower Waitaki River (Aotearoa – New Zealand)

Cited by 9 publications

References 53 publications

Numerical Simulations of Confined Braided River Morphodynamics: Display of Deterministic Chaos and Characterization Through Turbulence Theory

Numerical Simulations of Confined Braided River Morphodynamics: Display of Deterministic Chaos and Characterization Through Turbulence Theory

BASEveg: A python package to model riparian vegetation dynamics coupled with river morphodynamics

Plants and river morphodynamics: The emergence of fluvial biogeomorphology

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