Analysis of suspended sediment dynamics at event scale: comparison between a Mediterranean and an Alpine basin

Pagano, Stefano; Rainato, Riccardo; García-Rama, Adriana; Gentile, Francesco; Lenzi, Mario Aristide

doi:10.1080/02626667.2019.1606428

Cited by 30 publications

(14 citation statements)

References 66 publications

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“…Most of the analyzed events (events nr. 4, 5, 6, 7, 8, and 9), show that the counter-clockwise direction is predominant, during both circular and eight-shaped hysteresis, in accordance with the behavior of the whole Carapelle basin [18,51].…”

Section: Water Discharge-solid Concentration Patternssupporting

confidence: 70%

“…The Q-SSC relationship was investigated at the event scale through the hysteresis analysis. [51]. The analysis of the hysteretic loops considers that if the sediment peak SSCp occurs before the water discharge peak Qp, or if the SSC/Q ratios on the rising limb of the hydrograph (Q-graph) are greater than those on the falling limb, then the loop is clockwise.…”

Section: Monitoring Equipment and Data Analysismentioning

confidence: 99%

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Setting Up of an Experimental Site for the Continuous Monitoring of Water Discharge, Suspended Sediment Transport and Groundwater Levels in a Mediterranean Basin. Results of One Year of Activity

Pagano

Sollitto²,

Colucci³

et al. 2020

Water

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The study of suspended sediment transport requires continuous measurement of water discharge to better understand the sediment dynamics. Furthermore, a groundwater monitoring network can support the stream discharge measures, as it reveals how the interactions between surface water and groundwater may affect runoff and consequently sediment transport during flood events. An experimental site for the continuous monitoring of water discharge, suspended sediment transport and groundwater levels was set up in the Carapellotto basin (27.17 km2), which is located in Apulia, Southern Italy. Seven flood events that occurred in the operation timespan were covered with a full record of both water discharge and sediment concentration. Some monitoring problems, largely due to the clogging of the float by mud, suggested to improve the experimental set up. The results show high values of suspended sediments concentration which indicate the sub-basin’s key role in the sediment delivery to the whole river system, while counter-clockwise hysteresis loops are the most frequent due to the basin characteristics. The effects of the interaction between surface water and groundwater are related not only to the flood magnitude but also to the hydrogeological features in the hyporheic zone.

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Section: Water Discharge-solid Concentration Patternssupporting

confidence: 70%

Section: Monitoring Equipment and Data Analysismentioning

confidence: 99%

Setting Up of an Experimental Site for the Continuous Monitoring of Water Discharge, Suspended Sediment Transport and Groundwater Levels in a Mediterranean Basin. Results of One Year of Activity

Pagano

Sollitto²,

Colucci³

et al. 2020

Water

Self Cite

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“…This demonstrates that the efficiency of flood events, in terms of sediment flux, decreases from the headwaters to the confluences. The causes of this behaviour can be multiple, but all of them are based on changes in: characteristics of sediment sources, degree of slope-channel connectivity, transport capacity or river channel morphology under the influence of flood events (Pagano et al, 2019).…”

Section: Eei -Quantification and Spatio-temporal Variationmentioning

confidence: 99%

Causes of spatio-temporal variations in the flood event efficiency index

Dumitriu

2022

pesd

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Spatio-temporal variation of suspended sediment load is a topic of real interest in river geomorphology, especially in the current context of climate change and increasing anthropogenic impacts. In the present study, an attempt was made to argue for these variations based on the correlations between the event efficiency index and the degree of sediment availability in river channel following flood events. Data from four gauging stations along the Trotuș River (Romania) were used to show these types of relationships. The results show that the spatial variations of the event efficiency index are in close correlation with the characteristics of the riverbed in the sectors analysed, and the temporal variations reflect the role of flood events in the modification of river channel and the availability of sediment. Major flood events have caused visible changes in the suspended sediment flux, which is why the analysis of the spatial and temporal variations must necessarily take into account the characteristics of the river channel in terms of sediment sources.

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“…The quality of the sample is verified using several statistical tests proposed in previous studies (Wald 1943;Mann and Whitney 1947;Grubbs and Beck 1972;Forthofer and Lehnen 1981), to test the independence stationarity, homogeneity, and singularity of the sample. The decision support system identifies the most appropriate class for adjusting a flow sample and estimating the Q T quantile of high return period (Ouarda et al 1994;El Adlouni et al 2008;Yahiaoui and Touaibia 2011). The methods developed in this system allow identifying the most suitable class for a series adjustment.…”

Section: Frequency Analysis Of Solid Flowmentioning

confidence: 99%

“…The diversity of relationships between liquid and solid flows as a function of spatial and temporal disparity interested several researchers to carry out probability modelling using frequency analysis for western Algeria (Yahiaoui and Touaibia 2011), the eastern Algerian watersheds (Mouas and Souag 2017), and the Walloon region of Belgium (Dautrebande et al 2006). The hysteresis graph is one of the methods used to analyse sediment concentration as a function of flow rates (C-Q) (Pagano et al 2019;Sadeghi et al 2018;Zhao et al 2017;Lloyd et al 2016). Williams (1989) is the first to categorize the hysteresis according to the shape of each graph into five classes: clockwise loop, counterclockwise loop, eight loops, straight line, and complex loop (Hamshaw et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Characterization and frequency analysis of flooding solid flow in semi-arid zone: case of Mekerra catchment in the north-west of Algeria

et al. 2020

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In this study, we evaluate the soil erosion and solid transport in the oued Mekerra watershed in north-west Algeria. The study area is subject to a semi-arid climate characterized by irregular rainfall and showers, which are often accompanied by significant floods. These floods of large volumes transport large amounts of solid input to the Sarno dam, which is in the outlet of oued Mekerra. Therefore, the water storage capacity of this dam is gradually decreasing, and it might reach the volume of dead water. For this study, we utilized the hydrometric database provided by the National Agency of Water Resources (ANRH). The operating period was 24 years, from 1988 to 2012. This period was extended by classic regression to 65 years, which allowed extracting a series of annual maximum instantaneous flow rates (Q IXA ) and subsequently quantified the sediment yield during floods. The specific degradation mean created by the 11 floods was quite high, in the order of 20 t km 2 year −1 . The highest value of solid contribution was observed during the floods of October 2000 (250,000 t), and the value of liquid contribution was 7,151,608 m 3 . The extracted results from the analysis of the graphs of concentration as a function of the liquid flow (C = f′(Q l )) showed four types of hysteresis curves: clockwise loop, counterclockwise loop, shape of eight, and straight line curve. Class II (clockwise loop) was the dominant class in the four events, namely the floods that occurred on 09/22/1992, 09/21/1998, 09/27/1999, and the 08/24/2002. From these results, the water resource sector managers could formulate various methods for protection from floods and against the risk of sedimentation in storage structures.

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Analysis of suspended sediment dynamics at event scale: comparison between a Mediterranean and an Alpine basin

Cited by 30 publications

References 66 publications

Setting Up of an Experimental Site for the Continuous Monitoring of Water Discharge, Suspended Sediment Transport and Groundwater Levels in a Mediterranean Basin. Results of One Year of Activity

Setting Up of an Experimental Site for the Continuous Monitoring of Water Discharge, Suspended Sediment Transport and Groundwater Levels in a Mediterranean Basin. Results of One Year of Activity

Causes of spatio-temporal variations in the flood event efficiency index

Characterization and frequency analysis of flooding solid flow in semi-arid zone: case of Mekerra catchment in the north-west of Algeria

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