Morphological Dynamics Index (MDI) classifies the degree of channel dynamics related to progressive changes over a relatively long-time scale and helps to implement future management strategies that consider also hazards related to fluvial processes and channel dynamics. The National Institute for Environmental Protection and research has promoted a methodology named IDRAIM (Rinaldi et al. 2016) for hydromorphological analysis of streams that pursues an integrated approach in line with the EU Water Framework Directive (WFD, 2006/60/EC), and the EU Floods Directive (2007/60/EC). In this study we present the application of the Morphological Dynamics Index (MDI) protocol, which is part of IDRAIM, to determine the assessment of morphological dynamics of the Basento river terminal sector. The main river channel was divided into 16 river reaches, of homogeneous geological and morphological characteristics. For each river reach “degree of confinement” and “confinement index” was defined, to evaluate river later confinement. The application of 10 other indicators was made for all the reaches defined. The results showed that 56 % of the analysed reaches have a very high IDM index, 25% have high morphological dynamics, while only 19 % have the characteristics of moderate morphological dynamics. The assessment of these results with the spatial temporal channel changes evolution of the last 150 years, has demonstrated that, reaches that shown a very high and high IDM index, are the same that from 1873 to today had changed their morphological characteristics, in some case also in a very significant way. The main causes that lead these changes are linked to i) human pressure with extraction of fluvial inert and artificial elements (hydraulic infrastructures like dam, expansion basin, and channel adjustments; ii) high magnitude flood events (e.g. March 2011 and December 2013), that even if they did not change morphological pattern, they determined important morphological variations also in the areas immediately adjacent to the river, which are mostly occupied by agricultural fields and various industrial activities. Rinaldi M., Surian N., Comiti F., Bussettini M. 2016. IDRAIM – Sistema di valutazione idromorfologica, analisi e monitoraggio dei corsi d'acqua – Versione aggiornata 2016 – ISPRA – Manuali e Linee Guida 131/2016. Roma, gennaio 2016.
"APPLICATION OF THE NEW MORPHOLOGICAL DYNAMICS INDEX (MDI) TO ASSESS SPATIAL AND TEMPORAL CHANNEL EVOLUTION OF THE BASENTO RIVER (SOUTHERN ITALY)"
de MUSSO, NICOLETTA MARIA;Caldara M.;Capolongo D.;Pennetta L.
2018-01-01
Abstract
Morphological Dynamics Index (MDI) classifies the degree of channel dynamics related to progressive changes over a relatively long-time scale and helps to implement future management strategies that consider also hazards related to fluvial processes and channel dynamics. The National Institute for Environmental Protection and research has promoted a methodology named IDRAIM (Rinaldi et al. 2016) for hydromorphological analysis of streams that pursues an integrated approach in line with the EU Water Framework Directive (WFD, 2006/60/EC), and the EU Floods Directive (2007/60/EC). In this study we present the application of the Morphological Dynamics Index (MDI) protocol, which is part of IDRAIM, to determine the assessment of morphological dynamics of the Basento river terminal sector. The main river channel was divided into 16 river reaches, of homogeneous geological and morphological characteristics. For each river reach “degree of confinement” and “confinement index” was defined, to evaluate river later confinement. The application of 10 other indicators was made for all the reaches defined. The results showed that 56 % of the analysed reaches have a very high IDM index, 25% have high morphological dynamics, while only 19 % have the characteristics of moderate morphological dynamics. The assessment of these results with the spatial temporal channel changes evolution of the last 150 years, has demonstrated that, reaches that shown a very high and high IDM index, are the same that from 1873 to today had changed their morphological characteristics, in some case also in a very significant way. The main causes that lead these changes are linked to i) human pressure with extraction of fluvial inert and artificial elements (hydraulic infrastructures like dam, expansion basin, and channel adjustments; ii) high magnitude flood events (e.g. March 2011 and December 2013), that even if they did not change morphological pattern, they determined important morphological variations also in the areas immediately adjacent to the river, which are mostly occupied by agricultural fields and various industrial activities. Rinaldi M., Surian N., Comiti F., Bussettini M. 2016. IDRAIM – Sistema di valutazione idromorfologica, analisi e monitoraggio dei corsi d'acqua – Versione aggiornata 2016 – ISPRA – Manuali e Linee Guida 131/2016. Roma, gennaio 2016.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
