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On the factors governing river morphology with a look on how rivers adapt to climate

Crosato, A. (author)

River morphology can be described at different scales: at the basin scale we distinguish the river network; at the reach scale the planform, the slope and average features, such as the width and bankfull water depth; at the cross-section scale the transverse variations of river bed topography; and at smaller scales we observe bedforms and...

abstract 2024

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Geul River flooding reproduced with a Delft3D depth-averaged model

Abi Aad, Zeina (author), Duro, G. (author), Cattapan, A. (author), Crosato, A. (author)

conference paper 2022

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River Bar Downscaling with Bed Sills and Bottom Groynes: A Numerical Study

Alahmady, Gamal (author), Crosato, A. (author), Werner, Micha (author)

conference paper 2022

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Adaptation of river channels to a wetter or drier climate: Insights from the Lower Pilcomayo River, South America

Crosato, A. (author), Grissetti-Vázquez, A. (author), Bregoli, F. (author), Franca, M.J. (author)

Climate change has a direct influence on both hydrology and floodplain vegetation of water courses, which are key players in river morphodynamics. The river system response to climate change is complex and the effects of non-linear interactions between alterations in water, sediment and vegetation remain incompletely understood. Which of...

journal article 2022

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Effects of initial and boundary conditions on gravel-bed river morphology

Paudel, Sandesh (author), Singh, Umesh (author), Crosato, A. (author), Franca, M.J. (author)

Assuming that the equilibrium geometry of river channels does not depend on their initial state but solely on boundary conditions, several formulas have been derived that relate the channel depth and width to the river bankfull discharge and bed material. However, due to the existence of a threshold for sediment motion and the strong non...

journal article 2022

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Alteration of the Fogera Plain flood regime due to Ribb Dam construction, Upper Blue Nile Basin, Ethiopia

Mulatu, C.A. (author), Crosato, A. (author), Langendoen, Eddy J. (author), Moges, Michael M. (author), McClain, M.E. (author)

The Fogera Plain, Ethiopia, is affected by recurrent flooding of the Ribb and Gumara Rivers. A large dam on the Ribb River is under construction for irrigation, but also to reduce flooding. We investigated the effects of the dam on the flood regime of the floodplain wetlands using a combination of hydrodynamic and a rainfall-runoff models....

journal article 2021

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An integrated review of river bars for engineering, management and transdisciplinary research

Crosato, A. (author), Mosselman, E. (author)

River training and river restoration often imply modifying the patterns and dimensions of bars, channels, and pools. Research since the 1980s has greatly advanced and matured our knowledge on the formation and behavior of river bars, thanks to field work, laboratory experiments, theoretical analyses, and numerical modelling by several research...

review 2020

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Revisiting Waal River Training by Historical Reconstruction

Le, T.B. (author), Crosato, A. (author), Montes Arboleda, A. (author)

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...

journal article 2020

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Long-term effects of dam operations for water supply to irrigation on downstream river reaches. The case of the Ribb River, Ethiopia

Mulatu, C.A. (author), Crosato, A. (author), Langendoen, Eddy J. (author), Moges, Michael M. (author), McClain, M.E. (author)

This work investigates the applicability of an analytical method for quick assessments of the long-term morphological effects of different dam operations on downstream river reaches with the idea to apply the method in feasibility studies to identify the least morphologic-impacting operation scenario. The Ribb River (Ethiopia) is used as a...

journal article 2020

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Bank Erosion Processes in Regulated Navigable Rivers

Duro, G. (author), Crosato, A. (author), Kleinhans, M. G. (author), Roelvink, D. (author), Uijttewaal, W.S.J. (author)

Vessel-induced waves affect the morphology and ecology of banks and shorelines around the world. In rivers used as waterways, ship passages contribute to the erosion of unprotected banks, but their short- and long-term impacts remain unclear. This work investigates the effects of navigation on bank erosion along a reach of the regulated Meuse...

journal article 2020

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Distinct patterns of bank erosion in a navigable regulated river

Duro, G. (author), Crosato, A. (author), Kleinhans, Maarten G. (author), Winkels, Timotheus G. (author), Woolderink, Hessel A.G. (author), Uijttewaal, W.S.J. (author)

Distinct bankline patterns appeared after the removal of protection works along a navigable reach of the Meuse River. A series of oblique embayments now dominate the riverine landscape after ten years of bank erosion, but their location and asymmetry cannot be explained yet. This work analyses and integrates field measurements of flow, ship...

journal article 2019

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Humans reshape wetlands: Unveiling the last 100 years of morphological changes of the Mara Wetland, Tanzania

Bregoli, F. (author), Crosato, A. (author), Paron, P. (author), McClain, M.E. (author)

The Lower Mara River and Wetland, Tanzania, is an important ecosystem and unique water resource for a vast semi-arid area. The river, an affluent of Lake Victoria, and the wetland are experiencing morphological and vegetation changes resulting in channel avulsions and wetland expansion. This study analyses the changes over the last 100 years...

journal article 2019

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Morphological Adaptation of River Channels to Vegetation Establishment: A Laboratory Study

Vargas-Luna, Andrés (author), Duro, G. (author), Crosato, A. (author), Uijttewaal, W.S.J. (author)

While the scientific community has long recognized that alluvial rivers are the product of interactions between flowing water and bed material transport, it is increasingly evident that vegetation mediates these interactions and influences the stream channel characteristics. In a novel set of mobile bed laboratory experiments with variable...

journal article 2019

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Morphodynamic trends of the Ribb River, Ethiopia, prior to dam construction

Mulatu, C.A. (author), Crosato, A. (author), Moges, Michael M. (author), Langendoen, Eddy J. (author), McClain, Michael (author)

The meandering Ribb River flows in northwest Ethiopia to Lake Tana, the source of the Blue Nile River. The river has already undergone changes due to several human interventions, such as embanking, sand mining, water extraction and lake level regulation for hydropower. At present, a dam and a weir are under construction to store and divert...

journal article 2018

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Impact of flow variability and sediment characteristics on channel width evolution in laboratory streams

Vargas Luna, A. (author), Crosato, A. (author), Byishimo, P. (author), Uijttewaal, W.S.J. (author)

Alluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, the frequency and duration of streamflow oscillations might also be important for the river channel formation. In addition, the river morphology appears influenced by both size and degree of uniformity of the...

journal article 2018

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On the stability of river bifurcations created by longitudinal training walls: Numerical investigation

Le, T.B. (author), Crosato, A. (author), Mosselman, E. (author), Uijttewaal, W.S.J. (author)

To maintain a navigable channel and improve high-flow conveyance, engineers have recently proposed constructing longitudinal training walls as an alternative to the traditional transverse groynes. However, previous work has shown that the system of parallel channels created by a longitudinal training wall might be unstable in rivers with...

journal article 2018

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Long-term morphological developments of river channels separated by a longitudinal training wall

Le, T.B. (author), Crosato, A. (author), Uijttewaal, W.S.J. (author)

Rivers have been trained for centuries by channel narrowing and straightening. This caused important damages to their ecosystems, particularly around the bank areas. We analyse here the possibility to train rivers in a new way by subdividing their channel in main and ecological channel with a longitudinal training wall. The effectiveness of...

journal article 2018

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Sediment heterogeneity and mobility in the morphodynamic modelling of gravel-bed braided rivers

Singh, Umesh (author), Crosato, A. (author), Giri, Sanjay (author), Hicks, Murray (author)

The effects of sediment heterogeneity and sediment mobility on the morphology of braided rivers are still poorly studied, especially when the partial sediment mobility occurs. Nevertheless, increasing the bed sediment heterogeneity by coarse sediment supply is becoming a common practice in river restoration projects and habitat improvement...

journal article 2017

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Effect of the barrage and embankments on flooding and channel avulsion case study Koshi River, Nepal

Devkota, L. (author), Crosato, A. (author), Giri, S. (author)

Humans have utilized water resources for millennia by modifying natural river courses and such interventions have greatly influenced not only river flows and sediment fluxes, but also the overall river morphology. Situated in the Nepal's eastern Ganges region, the braided Koshi River is unique among the other rivers, because of the high...

journal article 2012

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Experimental study on entrainment of large wood in lowland rivers

Crosato, A. (author), Rajbhandari, N. (author), Comiti, F. (author), Uijttewaal, W.S.J. (author)

Wood transport in rivers, typically occurring during flood events, represents a relevant hazard for its potential to create obstruction at bridges and narrow cross-sections. Therefore, the understanding and prediction of entrainment and transport dynamics of woody material of different shapes, density and dimensions is of great interest for...

conference paper 2011