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Dr Anne Baar

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Anne Baar

Post-doctoral Research Associate


Critical dependence of morphodynamic models of fluvial and tidal systems on empirical downslope sediment transport (2019)
Journal Article
Baar, A. W., Boechat Albernaz, M., van Dijk, W. M., & Kleinhans, M. G. (2019). Critical dependence of morphodynamic models of fluvial and tidal systems on empirical downslope sediment transport. Nature communications, 10(1), https://doi.org/10.1038/s41467-019-12753-x

The morphological development of fluvial and tidal systems is forecast more and more frequently by models in scientific and engineering studies for decision making regarding climate change mitigation, flood control, navigation and engineering works.... Read More about Critical dependence of morphodynamic models of fluvial and tidal systems on empirical downslope sediment transport.

Interaction between lateral sorting in river bends and vertical sorting in dunes (2019)
Journal Article
Baar, A. W., Weisscher, S. A., & Kleinhans, M. G. (in press). Interaction between lateral sorting in river bends and vertical sorting in dunes. Sedimentology, https://doi.org/10.1111/sed.12656

Sediment is sorted in river bends under the influence of gravity that pulls the heavier grains downslope and secondary flow that drags the finer grains upslope. Furthermore, when dunes are present, sediment is also sorted vertically at the dune lee s... Read More about Interaction between lateral sorting in river bends and vertical sorting in dunes.

Morphological effects of vegetation on the tidal–fluvial transition in Holocene estuaries (2018)
Journal Article
Lokhorst, I. R., Braat, L., Leuven, J. R. F. W., Baar, A. W., van Oorschot, M., Selaković, S., & Kleinhans, M. G. (in press). Morphological effects of vegetation on the tidal–fluvial transition in Holocene estuaries. Earth surface dynamics ESURF ; an interactive open access journal of the European Geosciences Union, 6(4), 883-901. https://doi.org/10.5194/esurf-6-883-2018

Vegetation enhances bank stability and sedimentation to such an extent that it can modify river patterns, but how these processes manifest themselves in full-scale estuarine settings is poorly understood. On the one hand, tidal flats accrete faster i... Read More about Morphological effects of vegetation on the tidal–fluvial transition in Holocene estuaries.

Sediment Transport of Fine Sand to Fine Gravel on Transverse Bed Slopes in Rotating Annular Flume Experiments (2018)
Journal Article
Baar, A. W., de Smit, J., Uijttewaal, W. S. J., & Kleinhans, M. G. (2018). Sediment Transport of Fine Sand to Fine Gravel on Transverse Bed Slopes in Rotating Annular Flume Experiments. Water Resources Research, 54(1), 19-45. https://doi.org/10.1002/2017wr020604

Large‐scale morphology, in particular meander bend depth, bar dimensions, and bifurcation dynamics, are greatly affected by the deflection of sediment transport on transverse bed slopes due to gravity and by secondary flows. Overestimating the transv... Read More about Sediment Transport of Fine Sand to Fine Gravel on Transverse Bed Slopes in Rotating Annular Flume Experiments.

Scour holes and ripples occur below the hydraulic smooth to rough transition of movable beds (2017)
Journal Article
Kleinhans, M. G., Leuven, J. R. F. W., Braat, L., & Baar, A. (2017). Scour holes and ripples occur below the hydraulic smooth to rough transition of movable beds. Sedimentology, 64(5), 1381-1401. https://doi.org/10.1111/sed.12358

Scour holes often form in shallow flows over sand on the beach and in morphodynamic scale experiments of river reaches, deltas and estuarine landscapes. The scour holes are on average 2 cm deep and 5 cm long, regardless of the flow depth and appear t... Read More about Scour holes and ripples occur below the hydraulic smooth to rough transition of movable beds.

Bank pull or bar push: What drives scroll-bar formation in meandering rivers? (2014)
Journal Article
van de Lageweg, W. I., van Dijk, W. M., Baar, A. W., Rutten, J., & Kleinhans, M. G. (2014). Bank pull or bar push: What drives scroll-bar formation in meandering rivers?. Geology, 42(4), 319-322. https://doi.org/10.1130/g35192.1

One of the most striking features of meandering rivers are quasi-regular ridges of the point bar, evidence of a pulsed lateral migration of meander bends. Scroll bars formed on the inner bend are preserved on the point-bar surface as a series of ridg... Read More about Bank pull or bar push: What drives scroll-bar formation in meandering rivers?.

Valley formation by groundwater seepage, pressurized groundwater outbursts and crater-lake overflow in flume experiments with implications for Mars (2014)
Journal Article
Marra, W. A., Braat, L., Baar, A. W., & Kleinhans, M. G. (2014). Valley formation by groundwater seepage, pressurized groundwater outbursts and crater-lake overflow in flume experiments with implications for Mars. Icarus, 232, 97-117. https://doi.org/10.1016/j.icarus.2013.12.026

Remains of fluvial valleys on Mars reveal the former presence of water on the surface. However, the source of water and the hydrological setting is not always clear, especially in types of valleys that are rare on Earth and where we have limited know... Read More about Valley formation by groundwater seepage, pressurized groundwater outbursts and crater-lake overflow in flume experiments with implications for Mars.

Turning the tide: experimental creation of tidal channel networks and ebb deltas (2012)
Journal Article
Kleinhans, M., van der Vegt, M., van Scheltinga, R. T., Baar, A., & Markies, H. (2012). Turning the tide: experimental creation of tidal channel networks and ebb deltas. Netherlands Journal of Geosciences, 91(3), 311-323. https://doi.org/10.1017/s0016774600000469

Tidal channel networks, estuaries and ebb deltas are usually formed over a period longer than observations cover. Much is known about their characteristics and formation from linear stability analyses, numerical modelling and field observations. Howe... Read More about Turning the tide: experimental creation of tidal channel networks and ebb deltas.