Wetlands in River Valleys as an Effect of Fluvial Processes and Anthropopression - Wetlands and Water Framework Directive: Protection, Management and Climate Change - page 69

Fig. 5.2 The morphology of single-row alternate bars in straight channels with forti ed banks
(after Rhoads and Welford 1991 )

Fig. 5.3 Bedforms squeezed in a regulated channel (Source Pi ń cz ó w Aero-club)

embankments ( ajczak 2006a ). The banks of regulated rivers should receive proper

maintenance as long as natural processes of river channel curving exist. Otherwise,
the bank forti

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cations would be broken by fl floods allowing the river to regain the

natural fl flow conditions.

Mountain Rivers
Check dams as well as step cascades are mainly used for technical regulation of
mountain rivers. The aim of using check dams in the upper run of the streams is to
halt excessive load from overburdening the river channel but this also consequences
with the increase of the erosion processes in the downstream sections (Wy ga et al.

2008 ). For this reason, river fall corrections such as steps are introduced, adjusting
hydrodynamic balance of the river through minimising load transportation ability.

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