Closing secondary channels in large sand-bed braided rivers

Closing secondary channels in large sand-bed braided rivers

Ostanek Jurina, T.
Mosselman, E. (TU Delft Rivers, Ports, Waterways and Dredging Engineering)

2017

Large braided rivers have many beneficial  roles, from provision of water for agriculture  and means of transport to various ecosystem  services. However, they are  geomorphologically active, which results in  problems with bank erosion and navigability.  Some of the largest rivers may have bank line  shifts of hundreds of meters per year (Baki and  Gan, 2012). This leads to loss of homes and  good agricultural land, destruction of  infrastructure and flood protection works.  River training measures are used to combat  these problems and reclaim lost land.  Conventional structures, mostly developed in  smaller watercourses, are problematic in very  large and unpredictable braided rivers, due to  their required size, cost, inflexibility and  environmental disturbance (Nakagawa et al.,  2013).  More adaptable, cheaper (local materials)  and less disturbing measures are required.  One promising possibility is the use of  recurrent measures (such as bandals) to close  aggressive secondary channels (Mosselman,  2006). Coupled with a prediction model for  planform changes and erosion (such as  Klaassen et al., 1993), this can be a very  flexible and efficient way to protect nearby land  against bank erosion, start land reclamation or  improve navigability. 

http://resolver.tudelft.nl/uuid:aacbdf93-a99f-45d9-87fb-743bbfd5f93b

92-93

NCR-Days 2017, 2017-02-01 → 2017-02-03, Wageningen, Netherlands

A.J.F. Hoitink, T.V. de Ruijsscher, T.J. Geertsema, B. Makaske, J. Wallinga, J.H.J. Candel, J. Poelman (Eds.) NCR days 2017, Febr. 1-3, 2017. Book of abstracts, NCR publication 41-2017.

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© 2017 T. Ostanek Jurina, E. Mosselman