NDLI: Reconstructing temporal changes and prediction of channel evolution in a large Alpine river: the Tagliamento river, Italy

Content Provider	Springer Nature Link
Author	Ziliani, Luca Surian, Nicola
Copyright Year	2015
Abstract	This paper focuses on the temporal elements of the REFORM hydromorphological framework, illustrating these elements with an analysis of information from the lower Tagliamento river, Italy. It presents an analysis of historical channel adjustments at segment and reach scales over the last two centuries, reflecting human pressures that are summarised but not fully developed in this paper, and an analysis of data from aerial photographs, topographic surveys, and river flow records. This is followed by an assessment of likely future changes over the period 2012–2035 based upon both a conceptual model founded on the historical analysis and numerical modelling. The Tagliamento river has gone through three main phases of adjustment. The first two phases, characterized by narrowing and incision, were driven primarily by human interventions (i.e. sediment mining and channelization). The most recent phase represents an attempt of the river to achieve a new equilibrium condition and is mainly controlled by flow regime (i.e. frequency and magnitude of formative discharges) and vegetation establishment. As for future channel evolution, both models showed that slight width changes are likely to occur over the period 2012–2035. Channel widening, that could be expected as a response to an excess of unit stream power, will be hampered by vegetation establishment. Finally, the “no intervention” strategy seems to be the best option for leading the river towards a new equilibrium condition and to achieve different goals (e.g. flood mitigation, conservation or improvement of ecological status).
Starting Page	83
Ending Page	94
Page Count	12
File Format	PDF
ISSN	10151621
Journal	Aquatic Sciences
Volume Number	78
Issue Number	1
e-ISSN	14209055
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-09-19
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Braided rivers Evolutionary trajectory Vegetation establishment CAESAR model River management Freshwater & Marine Ecology Marine & Freshwater Sciences Oceanography Ecology Life Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Aquatic Science Water Science and Technology Ecology, Evolution, Behavior and Systematics

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