Role And Management Of In-channel
Wood In Relation To Flood Events In
Southern Andes Basins
Author(s)
L. Mao, F. Comiti, A. Andreoli, L. Picco1, M. A. Lenzi,
A.Urciulo, R. Iturraspe & A. Iroumè
Abstract
This paper analyses the connection among wood dynamics, channel morphology
and flood risk in mountain basins of the Southern Chilean Andes and of the
Argentinean Tierra del Fuego. Guidelines for the management of in-channel
wood and of the riparian buffer strip are suggested, along with considerations
about possible input from landslides and debris flows. A selection of low-impact
check dams specifically designed for the retention of floating LW elements is
finally provided.
Keywords: woody debris, mountain rivers, flood risk, control works.
1 Introduction
Large wood (LW) in mountain streams plays – especially when organized in
jams – relevant geomorphic and biological roles which enhance the ecological
status of natural channels by increasing morphological diversity and complexity
[6]. LW accumulations strongly affect also flow hydraulics and transport/storage
of sediments within the channel system, thus conditioning channel dimensions
[12] and typology and distribution of bedforms [11]. These beneficial effects
persist from low to high flows, and throughout the entire channel network.
Keywords
woody debris, mountain rivers, flood risk, control works.
Related Book
Other papers in this volume
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