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<p>Accurate predictions of flow resistance and potential sediment transport in multi-species vegetated rivers are essential for preserving their functionality over time. This study investigates the hydrodynamic impacts of coexisting plants species in real vegetated streams through field data and hydraulic simulations across three pre-flooding hydrological scenarios. By coupling Stone and Shen (2002) and Baptist et al. (2007) flow resistance models with four composite cross-section methods, this research compares the accuracy of Manning’s <i>n</i> hydraulic roughness coefficient and effective sediment transport capacity <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\tau {\prime}\)</EquationSource> </InlineEquation><i>/</i><InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\tau\)</EquationSource> </InlineEquation> estimations for single and multiple plants species. In the first case, Manning’s <i>n</i> obtained under Stone and Shen (2002) model are more sensitive to discharge than those from Baptist et al. (2007), while it emerges as the most accurate for multiple plants species, with average Nash–Sutcliffe Efficiency (<i>NSE</i>) coefficient of 0.757. Systematically, <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\tau {\prime}\)</EquationSource> </InlineEquation><i>/</i><InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\tau\)</EquationSource> </InlineEquation> estimations for multiple plants species are less accurate than those for single species, with maxima <i>NSE</i> of 0.769 and 0.791, respectively. These results provide a robust benchmark for sustainable surface water management by integrating plants-scale hydrodynamic analyses into large-scale river engineering modeling within vegetated watercourses.</p>

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Hydrodynamics and Sediment Transport Capacity of Vegetated Rivers Covered by Multiple Plants Species: A Reach-Scale Analysis

  • 期刊论文

  • 发表日期：

    2026年6月23日

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  • Giuseppe Francesco Cesare Lama

摘要

Accurate predictions of flow resistance and potential sediment transport in multi-species vegetated rivers are essential for preserving their functionality over time. This study investigates the hydrodynamic impacts of coexisting plants species in real vegetated streams through field data and hydraulic simulations across three pre-flooding hydrological scenarios. By coupling Stone and Shen (2002) and Baptist et al. (2007) flow resistance models with four composite cross-section methods, this research compares the accuracy of Manning’s n hydraulic roughness coefficient and effective sediment transport capacity \(\tau {\prime}\) / \(\tau\) estimations for single and multiple plants species. In the first case, Manning’s n obtained under Stone and Shen (2002) model are more sensitive to discharge than those from Baptist et al. (2007), while it emerges as the most accurate for multiple plants species, with average Nash–Sutcliffe Efficiency (NSE) coefficient of 0.757. Systematically, \(\tau {\prime}\) / \(\tau\) estimations for multiple plants species are less accurate than those for single species, with maxima NSE of 0.769 and 0.791, respectively. These results provide a robust benchmark for sustainable surface water management by integrating plants-scale hydrodynamic analyses into large-scale river engineering modeling within vegetated watercourses.