Field data and regional modeling of sediment supply to Emilia-Romagna's river mouths

Silvia Cilli, Paolo Billi, Leonardo Schippa, Edoardo Grottoli, Paolo Ciavola

Research output: Contribution to journalConference article

Abstract

The Fiumi Uniti and Savio rivers are two small sandy-bed river systems which sediment yield contributes feeds part of the Emilia-Romagna beaches (Italy). Since the twentieth century the northern Adriatic coast has been affected by well-known beach retreat phenomena. As the sediment supply of these local rivers is not well known, an analysis of bed-load transport rates for the last 10 kilometres of the river has been done. Multiple analysis, supported by direct field measurements of the 2005-06 and 2017 years (still ongoing) have been realized. Complementary hydraulic investigation and modelling have been performed. Repeated bed-material samplings have been carried out during different flood conditions, obtaining a significant number of observations. Aiming at defining the behaviour of sediment-transport in these two rivers, this paper focuses on the analysis of threshold sediment transport condition. Several formulae available in literature were used to test the field measurements. All these criteria seem inappropriate to predict the threshold conditions for bed particle entrainment in terms of the value of bed shear stress. The inaccurate estimation given by these formulae is due to the fact that they do not consider natural grain-shape factors or are mainly suitable for gravel-bed rivers.

Fingerprint

Sediments
Rivers
river
sediment
modeling
sediment transport
beach
Sediment transport
Beaches
bottom stress
river bed
sediment yield
bedload
twentieth century
entrainment
river system
shear stress
gravel
Gravel
hydraulics

Cite this

Cilli, Silvia ; Billi, Paolo ; Schippa, Leonardo ; Grottoli, Edoardo ; Ciavola, Paolo. / Field data and regional modeling of sediment supply to Emilia-Romagna's river mouths. In: E3S Web of Conferences. 2018 ; Vol. 40.
@article{1395405edae94acdb2d0584fadcedec7,
title = "Field data and regional modeling of sediment supply to Emilia-Romagna's river mouths",
abstract = "The Fiumi Uniti and Savio rivers are two small sandy-bed river systems which sediment yield contributes feeds part of the Emilia-Romagna beaches (Italy). Since the twentieth century the northern Adriatic coast has been affected by well-known beach retreat phenomena. As the sediment supply of these local rivers is not well known, an analysis of bed-load transport rates for the last 10 kilometres of the river has been done. Multiple analysis, supported by direct field measurements of the 2005-06 and 2017 years (still ongoing) have been realized. Complementary hydraulic investigation and modelling have been performed. Repeated bed-material samplings have been carried out during different flood conditions, obtaining a significant number of observations. Aiming at defining the behaviour of sediment-transport in these two rivers, this paper focuses on the analysis of threshold sediment transport condition. Several formulae available in literature were used to test the field measurements. All these criteria seem inappropriate to predict the threshold conditions for bed particle entrainment in terms of the value of bed shear stress. The inaccurate estimation given by these formulae is due to the fact that they do not consider natural grain-shape factors or are mainly suitable for gravel-bed rivers.",
author = "Silvia Cilli and Paolo Billi and Leonardo Schippa and Edoardo Grottoli and Paolo Ciavola",
year = "2018",
month = "9",
day = "5",
doi = "10.1051/e3sconf/20184004002",
language = "English",
volume = "40",
journal = "E3S Web of Conferences",
issn = "2267-1242",

}

Field data and regional modeling of sediment supply to Emilia-Romagna's river mouths. / Cilli, Silvia; Billi, Paolo; Schippa, Leonardo; Grottoli, Edoardo; Ciavola, Paolo.

In: E3S Web of Conferences, Vol. 40, 04002, 05.09.2018.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Field data and regional modeling of sediment supply to Emilia-Romagna's river mouths

AU - Cilli, Silvia

AU - Billi, Paolo

AU - Schippa, Leonardo

AU - Grottoli, Edoardo

AU - Ciavola, Paolo

PY - 2018/9/5

Y1 - 2018/9/5

N2 - The Fiumi Uniti and Savio rivers are two small sandy-bed river systems which sediment yield contributes feeds part of the Emilia-Romagna beaches (Italy). Since the twentieth century the northern Adriatic coast has been affected by well-known beach retreat phenomena. As the sediment supply of these local rivers is not well known, an analysis of bed-load transport rates for the last 10 kilometres of the river has been done. Multiple analysis, supported by direct field measurements of the 2005-06 and 2017 years (still ongoing) have been realized. Complementary hydraulic investigation and modelling have been performed. Repeated bed-material samplings have been carried out during different flood conditions, obtaining a significant number of observations. Aiming at defining the behaviour of sediment-transport in these two rivers, this paper focuses on the analysis of threshold sediment transport condition. Several formulae available in literature were used to test the field measurements. All these criteria seem inappropriate to predict the threshold conditions for bed particle entrainment in terms of the value of bed shear stress. The inaccurate estimation given by these formulae is due to the fact that they do not consider natural grain-shape factors or are mainly suitable for gravel-bed rivers.

AB - The Fiumi Uniti and Savio rivers are two small sandy-bed river systems which sediment yield contributes feeds part of the Emilia-Romagna beaches (Italy). Since the twentieth century the northern Adriatic coast has been affected by well-known beach retreat phenomena. As the sediment supply of these local rivers is not well known, an analysis of bed-load transport rates for the last 10 kilometres of the river has been done. Multiple analysis, supported by direct field measurements of the 2005-06 and 2017 years (still ongoing) have been realized. Complementary hydraulic investigation and modelling have been performed. Repeated bed-material samplings have been carried out during different flood conditions, obtaining a significant number of observations. Aiming at defining the behaviour of sediment-transport in these two rivers, this paper focuses on the analysis of threshold sediment transport condition. Several formulae available in literature were used to test the field measurements. All these criteria seem inappropriate to predict the threshold conditions for bed particle entrainment in terms of the value of bed shear stress. The inaccurate estimation given by these formulae is due to the fact that they do not consider natural grain-shape factors or are mainly suitable for gravel-bed rivers.

UR - http://www.scopus.com/inward/record.url?scp=85053793451&partnerID=8YFLogxK

U2 - 10.1051/e3sconf/20184004002

DO - 10.1051/e3sconf/20184004002

M3 - Conference article

VL - 40

JO - E3S Web of Conferences

T2 - E3S Web of Conferences

JF - E3S Web of Conferences

SN - 2267-1242

M1 - 04002

ER -