What river morphology after restoration? / Andrea Nardini in JRBM : International journal of river basin management, Vol. 10 N° 1 (Janvier 2012)  

Public ISBD [article]  inJRBM : International journal of river basin management > Vol. 10 N° 1 (Janvier 2012) . - pp. 29-47 Titre : What river morphology after restoration? : The methodology VALURI Type de document : texte imprimé Auteurs : Andrea Nardini, Auteur ; Sara Pavan, Auteur Année de publication : 2012 Article en page(s) : pp. 29-47 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : River management restoration Hydro-morphological risk assessment Environmental cost–benefit analysis Integrated evaluation Po-river basin (Italy) Résumé : This paper proposes a tool which river managers may need to ascertain whether the key idea of River Restoration is valid, i.e. that rivers in more natural status are desirable not only for pure environmental reasons, but also to combat flood and geomorphic risk. The point addressed is how to predict the morphology and geometry that a river will assume after the application of a River Restoration project which foresees significant changes in the system of defence and exploitation works as well as morphological adjustments (e.g. reconnection of an incised main channel with the surrounding ex-floodplain). To this aim we developed a semi-quantitative methodology that integrates several differing criteria: from historical analysis of geomorphic evolution, expert-based mechanistic reasoning, checking with empirical qualitative formulas and analytical support from fluvial geomorphology and classic hydraulics. The development of the methodology has taken place on a case study along the 80 km of Chiese River, downstream of Idro lake, in northern Italy. Although the product to be considered is just a pilot one, we see it as a promising tool, which also opens several challenging questions suited for further fascinating research work. ISSN : 1571-5124 En ligne : http://www.tandfonline.com/doi/full/10.1080/15715124.2011.640637 [article] What river morphology after restoration? : The methodology VALURI [texte imprimé] / Andrea Nardini, Auteur ; Sara Pavan, Auteur . - 2012 . - pp. 29-47. Hydraulique Langues : Anglais (eng) in JRBM : International journal of river basin management > Vol. 10 N° 1 (Janvier 2012) . - pp. 29-47 Mots-clés : River management restoration Hydro-morphological risk assessment Environmental cost–benefit analysis Integrated evaluation Po-river basin (Italy) Résumé : This paper proposes a tool which river managers may need to ascertain whether the key idea of River Restoration is valid, i.e. that rivers in more natural status are desirable not only for pure environmental reasons, but also to combat flood and geomorphic risk. The point addressed is how to predict the morphology and geometry that a river will assume after the application of a River Restoration project which foresees significant changes in the system of defence and exploitation works as well as morphological adjustments (e.g. reconnection of an incised main channel with the surrounding ex-floodplain). To this aim we developed a semi-quantitative methodology that integrates several differing criteria: from historical analysis of geomorphic evolution, expert-based mechanistic reasoning, checking with empirical qualitative formulas and analytical support from fluvial geomorphology and classic hydraulics. The development of the methodology has taken place on a case study along the 80 km of Chiese River, downstream of Idro lake, in northern Italy. Although the product to be considered is just a pilot one, we see it as a promising tool, which also opens several challenging questions suited for further fascinating research work. ISSN : 1571-5124 En ligne : http://www.tandfonline.com/doi/full/10.1080/15715124.2011.640637

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