Resilience measure: River Training

definition

River training refers to the structural measures which are taken to improve a river and its banks. River training is an important component in the prevention and mitigation of flash floods and general flood control, as well as in other activities such as ensuring safe passage of a flood under a bridge. For flash flood mitigation, the main aim is to control the water discharge regime in the watercourse by limiting its dynamic energy, thereby controlling the morphological evolution of the watercourse. More specifically, the river channel may be deepened allowing it to carry more water. Involves the moving of mud and sand along a river course until the bends of the river are filled and its main channel is excavated sufficiently enough to contain the volume of water. Channel widening can rehabilitate regulated watercourses and reduce the extent of streamed erosion and the risk of flooding. Widening the river gives it the opportunity for self-dynamic development of a typical equilibrium. River training structures can be classified into two main categories: transversal protection structures and longitudinal protection structures
(Shrestha, A. B. et. al., 2012, p. 60 ).

Co-benefits and impacts

Apart form making river navigable for ships, etc., river training measures also reduce sediment transportation and thus minimize bed and bank erosion (Shrestha, A. B. et. al., 2012, p. 60 ).

conditions

There are a number of types of river training structure. The selection and design of the most appropriate structure depends largely on the site conditions (Shrestha, A. B. et. al., 2012, p. 60 ).

Related Links





Time scales (Show all)

Medium term


Problem types (Show all)

Fluvial
Pluvial



Last modified: Sept. 13, 2016, 8:58 a.m.