Enhancing sediment flux control and natural hazard risk mitigation through a structured conceptual planning approach

Simoni, Silvia; Vignoli, Gianluca; Mazzorana, Bruno

doi:10.1016/j.geomorph.2017.01.026

Cited by 11 publications

(10 citation statements)

References 25 publications

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“…However, sediment transfer without barrier clogging is desirable for ordinary discharges (Simoni et al, 2017;Surian and Rinaldi, 2003). The optimum value of f opt D 84 = 1.75 D 84 for the bottom clearance of the screen (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Small clearance heights (f < 1.5) were expected to cause sediment deposition as soon as sediment is supplied to the flume. However, with regard to the continuity of sediment transport, which is ecomorphologically preferable (Piton and Recking, 2017;Simoni et al, 2017), the retention of small bedload transport rates is not appropriate. Therefore, small clearance heights of f < 1.5 are subsequently not considered.…”

Section: Sediment Deposition Controlmentioning

confidence: 99%

“…The high channel gradient in combination with flood discharges can transport considerable amounts of sediment toward downstream reaches, where the grains gradually deposit with decreasing channel slope (D'Agostino and . The transported sediment is essential for the natural ecomorphological pattern of downstream river reaches, but this sediment represents a substantial factor of risks regarding flood protection planning (Gabbud and Lane, 2015;Simoni et al, 2017;Surian and Rinaldi, 2003). In August 2005, the Swiss locality of Bristen witnessed such flood-driven sediment deposits in the village center, causing severe structural damage; and many similar cases have been reported for the same flood event (Bezzola, 2008;Bezzola and Hegg, 2007).…”

Section: Introductionmentioning

confidence: 97%

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Analysis of mechanical-hydraulic bedload deposition control measures

et al. 2017

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Section: Discussionmentioning

confidence: 99%

Section: Sediment Deposition Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Analysis of mechanical-hydraulic bedload deposition control measures

et al. 2017

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“…This infrastructure slows discharge of runoff from the Enterprise Park area into the stream network, and induces sedimentation, which field observation confirms is added to by the growth of dense vegetation within the retention basin. Since this type of structures is designed to retain water, although they favour sedimentation, additional measures to mitigate sediment loads are required, such as grade control structures [38].…”

Section: Impact Of Urbanization On Stream Sedimentsmentioning

confidence: 99%

“…This has mitigated the impact of urbanization on sediment dynamics as measured at the gauging station downstream. Specialized grading to increase surface roughness and reduce runoff velocity, however, provides an erosion protection measure used in previous projects [38].…”

Section: Impact Of Urbanization On Stream Sedimentsmentioning

confidence: 99%

Impact of Land-Use Changes on Spatiotemporal Suspended Sediment Dynamics within a Peri-Urban Catchment

Ferreira

Walsh

Kalantari

et al. 2020

Water

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Understanding sediment dynamics in peri-urban catchments constitutes a research challenge because of the spatiotemporal complexity and variability of land-uses involved. This study investigates differences in the concentration of total sediments (TSC) and suspended sediments (SSC) in the small peri-urban Mediterranean Ribeira dos Covões catchment (40% urban area) in central Portugal. Suspended sediment responses at the catchment outlet (E) and in three upstream sub-catchments, during periods of urbanization (2011–2013) and stabilizing land-use (2017–2018) are compared for storm-event datasets encompassing similar ranges of rainstorm sizes and antecedent rainfall condition. The Quinta sub-catchment, with the lowest urban area (22%) but subject to major construction activities affecting 17% of its area, led to highest TSC and SSC during urbanization (attaining 4320 mg/L and 4184 mg/L, respectively), and a median reduction of 38% and 69%, respectively, during stabilization. Espírito Santo sub-catchment, with highest urban area (49%) and minor construction activities, displayed similar median TSC in both periods (258–240 mg/L) but highest SSC reduction (76%), highlighting the impact of the anthropogenic disturbance mainly on fine-particle sediments and a good connectivity with the stream. Porto Bordalo sub-catchment, with 39% urban area and subject to the construction of a four-line road covering 1.5% of its area, showed the lowest TSC and SSC concentrations and the lowest median reductions in both periods (31% and 64%, correspondingly), mainly because of the impact of an unplanned retention basin established with soil from the construction site. Overall, median TSC and SSC reduced 14% and 59% at E, from urbanization to stabilization. Information about sediment dynamics should guide stakeholders in establishing strategies to reduce sediment loads and mitigate the impacts on urban aquatic ecosystems.

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Mitigating Complex Flood Risks in Southern Chile in a Particular Spatial Planning Context: Towards a Sustainable Strategy

Mazzorana

Maturana

2023

The Latin American Studies Book Series

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Enhancing sediment flux control and natural hazard risk mitigation through a structured conceptual planning approach

Cited by 11 publications

References 25 publications

Analysis of mechanical-hydraulic bedload deposition control measures

Analysis of mechanical-hydraulic bedload deposition control measures

Impact of Land-Use Changes on Spatiotemporal Suspended Sediment Dynamics within a Peri-Urban Catchment

Mitigating Complex Flood Risks in Southern Chile in a Particular Spatial Planning Context: Towards a Sustainable Strategy

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