Monitoring Methodology of Interventions for Riverbanks Stabilization: Assessment of Technical Solutions Performance

Pinto, A.; Fernandes, Luís Filipe Sanches; Maia, Rodrigo Jorge Fonseca de Oliveira

doi:10.1007/s11269-016-1486-4

Cited by 13 publications

(7 citation statements)

References 23 publications

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“…This is why we chose to focus on the very crucial early stage of the bank protection evolution, which led us to design experiments reflecting the worst conditions: no root system in very erodible noncohesive materials. Indeed, soil bioengineering works are implemented during the dormant season and do not show any roots before the following spring, and their mechanical resistance increases over time [Pinto et al, 2016].…”

Section: Scalingmentioning

confidence: 99%

“…Information consists essentially in observation of the structures' evolution a few years after their construction, considering the type of flow encountered and whether the structure remained intact or failed. Unfortunately, despite a growing effort to valorise post-project data [Batier, 2004;Leblois et al, 2016;Peeters et al, 2018], in the case of structure destruction we have almost no information on the mechanisms that resulted in the structure's failure, because we still crudely lack insitu evaluation of project performance over time [Buchanan et al, 2014;Pinto et al, 2016].…”

Section: Introductionmentioning

confidence: 99%

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Design of fascines for riverbank protection in alpine rivers: Insight from flume experiments

Recking

Piton

Montabonnet

et al. 2019

Ecological Engineering

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We present the results of flume experiments specifically designed to investigate the conditions required for successful bank protection using fascines, considered in the early and critical stage of their installation (no developed root system), in the alpine context. A total of 145 runs were performed with erodible banks, considering different combinations of protection design (no protection, rip-raps, twigs), bed mobility (with or without bedload), discharge (from low to exceptional floods), and bend curvature radius. None of the runs showed any direct fascine grabbing by the flow observed; all destruction was the consequence of bank scouring, erosion and collapse around the structure. In all cases, most destructive effects resulted from water recirculation inside the bank. Thus, we conclude that all measures aiming to reduce water circulations during the first stage of the fascine construction and development are recommended. This include large bend curvature radii (when possible), fining of the filling material, use of antiscouring twigs, optimisation of the programming of the works with consideration of the hydrology (shape of hydrographs) and regular survey of the structure. Our experiments show that anti-scouring twigs have a real protective effect by modifying the local hydraulics and promoting sediment deposition at the bank toe.

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Section: Scalingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of fascines for riverbank protection in alpine rivers: Insight from flume experiments

Recking

Piton

Montabonnet

et al. 2019

Ecological Engineering

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“…In fact, none of the other analysed methodologies incorporates this kind of assessment in the selection process. The information and knowledge that underlies the rating assignment for technical solutions comes from a wide bibliographic survey analysing the several studies referred to in this paper (Biedenharn et al., ; Cramer, ; Florineth, ; Gray & Sotir, ; Li & Eddleman, ; Simon & Steinemann, ; Zeh, ) as well as those corresponding to other projects already implemented (Li et al., ; Pinto et al., ; Teiga, ).…”

Section: Discussionmentioning

confidence: 99%

“…For this reason, stabilising riverbanks is an important component of the river rehabilitation process and one of the most common river rehabilitation actions performed in watercourses (Bariteau et al., ; Cavaillé et al., ; Cramer, ; Petrone & Preti, ). After analysis of projects currently taking place and projects already implemented, it was found that the technical solutions used to promote bank stability frequently do not consider the underlying cause of the bank instability (Cerrilo, ; Pinto et al., ). This situation can lead to the use of the incorrect technical solutions, which may translate into both environmental (excessive structural rigidity and/or inadequate use of land available) and economic consequences (oversized works, disproportionate approaches not adjusted to the real needs) (Cerrilo, ).…”

Section: Introductionmentioning

confidence: 99%

A method for selecting suitable technical solutions to support sustainable riverbank stabilisation

Pinto

Fernandes

Maia

2018

Area

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The interventions for riverbank stabilisation are among the most common river rehabilitation actions performed in watercourses. However, most of the interventions focus on traditional methods that, although effective at the structural level (i.e., at meeting riverbank stabilisation goals), usually produce negative effects on the ecological status of the river. Thus, due to the increased requirement for sustainable river management solutions, this paper proposes a methodology for selecting suitable technical solutions for riverbank stabilisation. This has two components: (1) characterising, diagnosing and identifying the condition and potential erosion of a riverbank by collecting information at spatial multi-scale and (2) selecting suitable technical solutions to support sustainable riverbank stabilisation through using evaluation matrices and analysis of the adequacy of each technical solution to the intervention site's conditions and stream flow characteristics. This approach allows a holistic and integrated analysis of the bank erosion problems and the selection of stabilising technical solutions that are best suited from a structural viewpoint. In order to comply with the WFD (Water Framework Directive) on river environment issues, complementary criteria are proposed that help select from the chosen technical solutions those that improve the diversity of habitats as well as mitigate the aesthetic impact with the lowest cost. The methodology was applied to a reach of the Cértima River (located in the Centro region of Portugal), where field visits were performed to help assess the riverbanks' condition as well as to select technical solutions for riverbank stabilisation. As a result, it was possible to select a set of the most suitable technical solutions to ensure physical and hydraulic required functions, to minimise morphological and landscape changes in the banks, and to promote habitat diversity. K E Y W O R D S bank erosion, bioengineering technical solutions, Centro region of Portugal, riverbank stabilisation, spatial multi-scale information ---

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“…Ecological engineering has been increasingly used in order to stabilize river banks [10][11][12][13][14][15][16], but this is still very uncommon in estuarine areas in Portugal. Some other studies supported the use of hydrodynamic models to predict bank stability under flow conditions [17][18][19][20]; in addition, these are essential for the identification of adequate vegetation to improve restoration processes [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Combination of Ecological Engineering Procedures Applied to Morphological Stabilization of Estuarine Banks after Dredging

Fernandes

Pinto

Terêncio

et al. 2020

Water

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Gravel extraction and upstream damming caused profound effects on the estuary of the Lima river (NW Portugal) which was reflected by the collapse of banks, leading further to the destruction of riparian vegetation. This led to consequences such as a progressive negative impact on the preservation of salt marshes over several decades of this protected area, which continued even after the cessation of extraction activities. In this work, we present a restoration project combining civil engineering with soft soil engineering procedures and revegetation, along with two distinct segments, and follow the recovery process. The main intention of the study is to promote hydraulic roughness in order to dissipate energy from peak flows and tides, increasing accretion and indirectly the stimulation of plant succession and salt marsh recovery. We are able to observe that the built structures (an interconnected system of groynes, deflectors and rip-rap/gabion mattress) allowed the erosion process to be detained. However, they did not allow as much sediment as expected to be trapped. The colonization of species (plants) in brackish and tidal water was a difficulty posed by this project. A more extensive restoration of all estuarine areas and river mouths, namely to overcome the sediment deficit, will require proper land-use management at the catchment scale instead of local actions.

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Monitoring Methodology of Interventions for Riverbanks Stabilization: Assessment of Technical Solutions Performance

Cited by 13 publications

References 23 publications

Design of fascines for riverbank protection in alpine rivers: Insight from flume experiments

Design of fascines for riverbank protection in alpine rivers: Insight from flume experiments

A method for selecting suitable technical solutions to support sustainable riverbank stabilisation

Combination of Ecological Engineering Procedures Applied to Morphological Stabilization of Estuarine Banks after Dredging

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