Longitudinal training dams mitigate effects of shipping on environmental conditions and fish density in the littoral zones of the river Rhine

Collas, F.P.L.; Buijse, A.D.; Heuvel, Lotte van den; Kessel, Nils; Schoor, Margriet M.; Eerden, H; Leuven, R.S.E.W.

doi:10.1016/j.scitotenv.2017.10.299

Cited by 53 publications

(60 citation statements)

References 41 publications

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“…, Collas et al. ). At a species‐specific level, the same approach can be used to a priori optimize habitats or to mitigate dominance of invasive bivalve species by taking the species‐specific sensitivities for environmental conditions into account.…”

Section: Discussionmentioning

confidence: 98%

Sensitivity of native and alien freshwater bivalve species in Europe to climate‐related environmental factors

et al. 2018

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While native freshwater bivalve species are declining, several alien bivalve species have become invasive, thereby impacting ecosystem functioning and services. These biodiversity changes can be attributed to deteriorated water quality, hydro‐morphological alterations, and the overarching effect of global change. Therefore, a systematic assessment of the sensitivity of freshwater bivalve species nowadays occurring in European inland waters to environmental factors is urgent. The present study reviewed 493 relevant papers, resulting in 8405 data entries on presence–absence of bivalve species in relation to environmental factors that are affected by global change (i.e., water temperature, water depth, oxygen availability, and flow velocity). From these worldwide field data, minimum and maximum values measured in their habitat and water bodies were selected. In addition, data on laboratory‐derived tolerance ranges were collected. Subsequently, novel species sensitivity distributions (SSDs) were derived for each environmental factor using field‐based occurrence data and laboratory‐derived tolerance ranges, respectively. Species sensitivity distributions for maximum habitat temperature significantly differed between native and alien species. The latter occurred in habitats with higher maximum water temperatures than native species. The increase in water temperatures by global warming will affect a higher percentage of native species than alien species. The ranking of species based on their sensitivity for various environmental factors shows that vulnerable and endangered species have a higher overall sensitivity and are likely to be more affected by climate change. Invasive alien species were found to have a lower overall sensitivity and are thus less affected by climate change further aiding to their invasive nature. The available SSDs allow the ranking of freshwater bivalve species sensitivity to environmental stressors, the prediction of their potential occurrence in freshwater habitats, and the evaluation of management measures to optimize their biodiversity and ecosystem services.

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Section: Discussionmentioning

confidence: 98%

Sensitivity of native and alien freshwater bivalve species in Europe to climate‐related environmental factors

et al. 2018

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“…Also, with respect to this criterion, the most appropriate starting location of the wall is just upstream of a point bar top. The presence of a shallow channel with a natural bank is another reason to prefer the longitudinal wall to the groynes because this potentially increases the river ecological value (Radspinner et al 2010;Collas et al 2018). Table 5 summaries the advantages and disadvantages of longitudinal walls.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Revisiting Waal River Training by Historical Reconstruction

Crosato

Arboleda

2020

J. Hydraul. Eng.

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The Dutch River Waal, a branch of the Rhine, has been trained for centuries to mitigate the effects of ice-jams and improve navigation. The works, started in 1850, involved river straightening and narrowing by a series of transverse groynes. Besides fulfilling their goal, the groynes also created the need to raise flood protection works and caused undesirable channel incision. This study assesses the effectiveness of training the river with a longitudinal wall instead of with groynes. The investigation analyzes the long-term response of the historical river with a two-dimensional depth-averaged (2DH) morphodynamic model. The results show that the wall would create two parallel channels, one becoming deeper and the other one shallower. The former would be as suitable for navigation as an equally-wide channel obtained with groynes. The latter would contribute in conveying water during high flow events and improve the river ecology. Training the river with a wall would also lessen channel incision. The best performance is obtained if the wall is built on the channel centerline, starting just upstream of a point bar top.

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“…However, such operations, which must avoid any risks to human activities (e.g., navigation and flood control), depend strongly on the financial resources available and local technical characteristics. Furthermore, some small interventions may also be tested to enhance local fish habitats [14,15] to reconfigure existing historical groynes and/or introduce wood structures [68].…”

Section: Channel Responses and Habitat Heterogeneitymentioning

confidence: 99%

“…More recently, several engineering strategies were tested along the Danube River, such as (i) riprap removal and groyne shortening, (ii) riprap and groyne field removal, and (iii) side channel reconnection, to increase the abundance of rheophilic fishes [14]. Along the Rhine River, longitudinal training dams (LTDs) were tested to simultaneously improve navigation during low flows, enhance safety for human activities and hydraulic infrastructures against floods, and create refugia for native fish at their juvenile stages [15]. On the channelized Godwin Creek River, stones were added to extend 18 small groynes to promote channel diversification and enhance fish habitats [16]; this research highlighted that the extension of groynes promoted habitat heterogeneity by increasing pool habitats and promoting grain size fining, following which the composition and relative abundance of fish were similar to those of the non-incised reference site.[17] used hydrodynamic models on the Chiliwack River to assess the effect of large wood within the stream and the implementation of rock groyne habitat structures (both simple and double rock groynes); their modeling results showed that these actions promoted an increase in habitat suitability for both salmon (Oncorhynchus kisutch) and trout species (Oncorhynchus mykiss) during high flows.Fish species can be viewed as umbrella species, i.e.…”

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confidence: 99%

Effects of Transverse Groynes on Meso-Habitat Suitability for Native Fish Species on a Regulated By-Passed Large River

Chardon¹,

Schmitt²,

Piégay³

et al. 2020

Preprint

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River regulations ultimately degrade fluvial forms and morphodynamics and simplify riparian and aquatic habitats. For several decades, river restoration actions have been performed to recover geomorphic processes and diversify these habitats to enhance both river biodiversity and ecosystem services. The objective of this study is to provide quantitative feedback on the experimental restoration of a large regulated and by-passed river (the Upper Rhine downstream of the Kembs Dam, France/Germany). This restoration consisted of the construction of two transverse groynes and the removal of bank protection. A monitoring framework composed of topo-bathymetric surveys as well as flow velocity and grain size measurements was established to assess the channel morphodynamic responses and evaluate their effects on habitat suitability for five native fish species using habitat models. A riverscape approach was used to evaluate the landscape changes in terms of both the configuration and the composition, which cannot be considered with classic approaches (e.g., WUA). Our results show that the two transverse groynes and, to a lesser extent, bank erosion, which was locally enhanced by the two groynes, increased habitat diversity due to the creation of new macroforms (e.g., pools and mid-bars) and fining of the bed grain size. Using a riverscape approach, our findings highlight that the restoration improved lentic fish habitats (eel and juvenile nase species) due to slowing of the local current and the deposition of fine sediments downstream of both groynes. As a consequence, the restoration improved the habitat suitability of the studied reach for more fish species compared with the pre-restoration conditions. This study also demonstrates that the salmon habitats downstream of the restored reach were improved due to fining of the bed grain size. This finding highlights that for restorations aimed at fish habitats, the grain size conditions must be taken into consideration along with the flow conditions. Furthermore, the implementation of groynes, while not a panacea, can be a strategy for improving fish habitats on highly regulated rivers, but only when more functional and natural options are impossible due to major constraints.

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Longitudinal training dams mitigate effects of shipping on environmental conditions and fish density in the littoral zones of the river Rhine

Cited by 53 publications

References 41 publications

Sensitivity of native and alien freshwater bivalve species in Europe to climate‐related environmental factors

Sensitivity of native and alien freshwater bivalve species in Europe to climate‐related environmental factors

Revisiting Waal River Training by Historical Reconstruction

Effects of Transverse Groynes on Meso-Habitat Suitability for Native Fish Species on a Regulated By-Passed Large River

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