Seasonal trends of suspended sediment concentration in a Mediterranean basin (Anoia River, NE Spain).

Farguell, Joaquim; Sala, María; Owens, Philip N.; Collins, A. J.

doi:10.1079/9780851990507.0085

Cited by 5 publications

(5 citation statements)

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“…The fitted parameters of rating curves allow the comparison of the observed sediment transport dynamics with those of other Mediterranean basins. Thus, events of group I presented similarities with those reported in the northeast of the Iberian Peninsula (Batalla and Sala, 1994;Farguell and Sala, 2006) and the southeastern part of Italy (De Girolamo et al, 2015), while events of group III resembled events in the Mediterranean basins of northern Algeria (Khanchoul et al, 2009;Millares et al, 2020). Events of group II show similar behaviour to the snowmelt and landslide processes previously reported in northern Japan (Chikita, 1996).…”

Section: Suspended Sediment Dynamics and Hydro-meteorological Driverssupporting

confidence: 78%

“…At the basin scale, numerous efforts have been made to understand suspended sediment transport linked to rainfall events (Walling, 1977;Williams, 1989;Walling and Fang, 2003;Zabaleta et al, 2007) and their temporal variability (Farguell and Sala, 2006;Rovira and Batalla, 2006;Kellner and Hubbart, 2018). However, few studies delve into the relationship of transport processes with hydro-meteorological drivers, which are especially relevant in mountainous environments (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…From headwaters to floodplains, sediment transport and connectivity between hillslopes and rivers can be understood from measurements of suspended sediment concentration (SSC) and water discharge (Q). From this relationship, rating curves, sediment yield and the effects of seasonality on erosive responses have previously been assessed (Batalla and Sala, 1994;Farguell and Sala, 2006;Mano et al, 2009;De Girolamo et al, 2015;Selmi and Khanchoul, 2016;Misset et al, 2019). The temporal analysis of this relationship provides an integrated view of time-varying sediment supply, and its correlation with different factors such as hydro-meteorological drivers, soil moisture and duration of flow responses (Seeger et al, 2004;Smith and Dragovich, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Hydro‐meteorological drivers influencing suspended sediment transport and yield in a semi‐arid mountainous basin

Millares

Moñino

2020

Earth Surf Processes Landf

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Understanding erosion and sediment transport dynamics is key for sustainable water resources management. The objective of this research was to assess suspended sediment responses, identifying relationships with hydro‐meteorological drivers, sediment sources and connectivity in a mountainous semi‐arid basin. With this purpose, suspended sediment concentrations of 12 events were measured by automatic sampling and classified based on six descriptors of hydro‐meteorological drivers, their related rating curves and hysteresis loop behaviour, and distribution of precipitation, snowfall and snowmelt. Comparison with sediment transport and yield along the river, previously reported, was also performed. The results allowed us to distinguish up to three types of events with different erosive responses, comparable with other Mediterranean environments and snowmelt‐driven basins. Events classified as type I and II were closely linked to snow processes. Those classified as type III presented higher sediment yield and negligible influence of snow processes. The analysis of rating curves and hysteresis loops confirmed the identified transport responses. Type I and II events, with clockwise behaviour, were related to in‐channel sediment storage. Type III events, with predominantly counter‐clockwise behaviour, were related to hillslope erosion processes of gullying and landslides. The sediment connectivity analysed highlights the role of vegetation cover and land uses, and its sensitivity in high mountainous environments, which fits with the observed sediment transport at the study site. The volume of sediment trapped in the bottomset area of a reservoir downstream was related to type I events (more frequent and of greater magnitude). However, spatial distribution and frequency of type III events are likely to become more relevant under future climate scenarios due to their high sensitivity to hydro‐meteorological drivers. These results highlight the vulnerability of high mountainous areas on erosive dynamics and justify long‐term monitoring as hotspots of future challenge for water resource management. © 2020 John Wiley & Sons, Ltd.

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Section: Suspended Sediment Dynamics and Hydro-meteorological Driverssupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydro‐meteorological drivers influencing suspended sediment transport and yield in a semi‐arid mountainous basin

Millares

Moñino

2020

Earth Surf Processes Landf

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“…In addition, sediment transport processes and their downstream effects can be understood through the quantification of suspended sediment concentration (SSC) and water discharge (Q) and their relationship. This relationship, or rating curves, could be used to assess sediment yield and the effects of seasonality on erosive responses, as have previously been reported in Mediterranean environments [CRAWFORD 1991;DE GIROLAMO et al 2015;FARGUELL, SALA 2006;FERGUSON 1987;MILLARES et al 2020;SELMI, KHANCHOUL 2016;WARRICK 2015].…”

Section: Introductionmentioning

confidence: 91%

Journal of Water and Land Development

Rabah,

Bouchelkia,

Belarbi

et al. 2021

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Soil loss is a major problem for watersheds management in semi-arid environments. The objective of the present study is to analyze the annual and seasonal patterns of suspended loads and quantify the specific sediment yields in a semi-arid environment of the Mazafran Watershed in central Algeria. The obtained information of water discharge and suspended sediment load, recorded during 19 years, was confronted with precipitation data in order to establish the relationships between the forcing agents and erosive processes. The specific sediment yield was estimated by assessing rating curve data under two types of identified responses. The obtained results allowed confirming the seasonality on suspended sediment transport in the studied basin, which accounts for 56% of the total suspended sediment load estimated in winter. The mean annual suspended sediment is estimated at 17.52 Mg•ha -1 •y -1 . The results highlighted that the type 2 event dominates the production of sediment in the study area in comparison with type 1 event. The analysis of the variability of rainfall erosivity index showed that there is a strong correlation between the annual precipitation and modified Fournier index (MFI), and a weak correlation with the monthly precipitation concentration index (PCI). Moreover, the spatial distribution of the modified Fournier index at the basin scale showed the highest precipitation aggressiveness in the Southern part of the study region for both type of events, whereas the precipitation aggressiveness low to moderate in the remaining part of the study region.

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“…Figure 4b shows the adjusted rating curve at the final control points 9 and 10 and the estimated 95% of confidence intervals. The obtained relationship, SSC = 11.79Q 1.68 , with similar coefficients fitted for Mediterranean environments (Farguell & Sala, 2006;Rovira, Batalla, & Sala, 2005) was used to derive an approximate range of the total suspended fraction that is likely to have been transported, distributed, and deposited within the bottom-set area of the reservoir.…”

Section: Deltaic Depositsmentioning

confidence: 99%

Sediment yield and transport process assessment from reservoir monitoring in a semi‐arid mountainous river

Millares

Moñino

2018

Hydrological Processes

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Soil loss, fluvial erosion, and sedimentation are major problems in semi‐arid environments due to the high associated costs of decreasing services such as provisioning and regulating water resources. The objective of this research is to analyse sediment yield in a mountainous semi‐arid basin, paying special attention to the sources of sediment, the associated uncertainties, and the transport processes involved. The segregation hypothesis along a reservoir of the sediment coming from hillslopes or fluvial systems is also evaluated. For this purpose, bottom‐set and deltaic deposits of a reservoir (110 hm3) in southern Spain have been measured and compared with basin erosion and fluvial transport monitoring over a 12‐year period. The volume of sediment stored at the bottomset of the reservoir shows a relative match with parametric predictions based on the Revised Universal Soil Loss Equation/Modified Universal Soil Loss Equation hillslope models and rating curves, estimated as being between 7 and 13 t·ha−1·year−1. Similarly, the measured volume of deltaic deposit fits the average value of stochastic simulations from different bedload transport equations. These contributions represent 50–65% of the total volume measured regarding suspended sediment inputs, way above that described in previous works. This highlights the importance of considering bedload when estimating the useful life of reservoirs in semi‐arid environments. The major differences in sediment grain size between hillslopes and river systems, and the size fractions measured along the reservoir, support the assertion of segregation hypothesis. Nonetheless, based on the processes observed and the uncertainty related to modelling, that assertion has to be taken with caution. At basin scale, a specific sediment yield of between 19 and 24 t·ha−1·year−1 has been estimated, which includes hillslopes and fluvial contributions. This rate is in the range of sediment yield reported for Mediterranean mountain areas of a torrential character. The pulse‐like nature of the system and the spatial heterogeneity of fluvial and hillslope erosion rates points out the importance of considering mid to long‐term and process‐based approaches and emphasizes the limitations of annual estimations for management purposes.

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Seasonal trends of suspended sediment concentration in a Mediterranean basin (Anoia River, NE Spain).

Cited by 5 publications

References 0 publications

Hydro‐meteorological drivers influencing suspended sediment transport and yield in a semi‐arid mountainous basin

Hydro‐meteorological drivers influencing suspended sediment transport and yield in a semi‐arid mountainous basin

Journal of Water and Land Development

Sediment yield and transport process assessment from reservoir monitoring in a semi‐arid mountainous river

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