Temporal changes in suspended sediment transport in an Atlantic catchment, NW Spain

Rodríguez‐Blanco, M. L.; Taboada-Castro, M.T.; Palleiro, L.

doi:10.1016/j.geomorph.2010.07.015

Cited by 38 publications

(39 citation statements)

References 32 publications

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“…Data show that fall discharge events had the highest average flow increases and were almost double the average flow increase of snow melt period discharges (Table 4). These results are consistent with those of Duvert et al [29], Rodriguez-Blanco et al [6], and Seeger et al [18] who observed that there are significant seasonal differences in sediment transport and that turbidity is not only tied to the absolute value of the event discharge but also to event intensity. When multiple discharge events occurred in succession, the largest turbidity spike was often associated with the first event rather than the largest event.…”

Section: Discussionsupporting

confidence: 92%

“…The reduction in peak turbidity values throughout a season is likely related to a seasonal depletion of sediment stores [6,10]. At the beginning of certain seasons there are stores of easy to transport sediment in the channel.…”

Section: Resultsmentioning

confidence: 99%

“…The processes which factor into producing a turbidity signal often depend on the interplay between physical watershed features (i.e., gradient, soil porosity, and vegetation cover), sediment availability, precipitation attributes (i.e., amount, intensity, rain vs. snow) and antecedent moisture conditions of the soil. Because of these additional controls on turbidity, typical rating curves based on linear regressions between discharge and suspended sediment concentrations tend to perform poorly for predicting turbidity or sediment loads [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…However, much of this work has been focused on individual discharge events [10][11][12], or has been in predominately agricultural areas [4,6,7,[11][12][13], in small hillslope plots [11] or in areas with drastically different physiographic and climatic regimes [7,14,15]. A few longer studies looking at multiple time scales have shown considerable temporal variation in sediment patterns.…”

Section: Introductionmentioning

confidence: 99%

“…McDonald and Lamoureux [15] found significant temporal variation in suspended sediment transport in High Arctic catchments that was linked to snow melt. Rodriguez-Blanco et al [6] found for agricultural basins in Spain that at the event scale sediment peaked before discharge, at the seasonal time scale sediment yield decreased through the season, and at the annual scale yield was linked to the percentage of the year that large events occurred. For a medium sized basin in Central New York, Gao and Josefson [7] found event and seasonal patterns to be too complex to identify sources or processes but they did show that in their system, event sediment was generally supply limited.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Accumulation and Depletion of Local Sediment Stores of Four Headwater Catchments

Martin

Conklin

Bales

2014

Water

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Seasonal turbidity patterns and event-level hysteresis analysis of turbidity verses discharge in four 1 km 2 headwater catchments in California's Sierra Nevada indicate localized in-channel sediment sources and seasonal accumulation-depletion patterns of stream sediments. Turbidity signals were analyzed for three years in order to look at the relationships between seasonal turbidity trends, event turbidity patterns, and precipitation type to stream sediment production and transport. Seasonal patterns showed more turbidity events associated with fall and early to mid-winter events than with peak snow-melt. No significant turbidity patterns emerged for periods of snow melt vs. rain. Single event hysteresis loops showed clockwise patterns were dominant suggesting local sediment sources. In successive discharge events, the largest turbidity spike was often associated with the first but not necessarily the largest discharge event-indicating seasonal depletion of local sediment stores. In multi-peaked discharge events, hysteresis loops shifted from clockwise to linear or random patterns suggesting that localized sediment stores are being used up and sufficient flow energy must be reached to start entraining the more consolidated bank/bed sediment or that dominant sediment sources may be shifting to less localized areas such as hill slopes. A conceptual model with phases of accumulation and transport is proposed.

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Section: Discussionsupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seasonal Accumulation and Depletion of Local Sediment Stores of Four Headwater Catchments

Martin

Conklin

Bales

2014

Water

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Baseflow and Runoff Event Metal Concentrations, Partition and Its Relation with Physicochemical Variables in an Agroforestry Catchment

Palleiro

Rodríguez‐Blanco

Taboada-Castro

2013

CLEAN Soil Air Water

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Partitioning to suspended sediments plays an important role in controlling metal speciation in natural waters. In order to model both dissolved and particulate forms of metals, it is essential to determine possible relationships between partition coefficient (K D ) and various water quality variables. This paper examines temporal variability in particulate and dissolved metals (Al, Fe, Mn, Cu, and Zn) collected from a rural stream (NW Spain) during three years under baseflow and runoff events conditions, and investigates the role of pH, suspended sediments (SS) and dissolved organic carbon (DOC) on K D of these metals. The mean concentrations of metals during events were much higher than those in baseflow (except Mn D and Cu D ), but particulate metals were always predominant. Metal concentrations did not exhibit a seasonal pattern. Generally, a similar pattern of metals to discharge was seen for both hydrological conditions, although different metal-discharge relationships were observed depending on the type and form of the metal: negative for Fe D and Mn D , no relation for Al D , Cu D , and Zn D , and positive correlation for all particulate metals (except for Cu P and Zn P in baseflow). Partitioning results showed that SS and DOC were the main factors in controlling K D of all metals during events (except for Fe) as well as K D of Al under baseflow. SS play the most important role on K D of Cu and Zn in baseflow, and DOC on K D of Fe (regardless of the discharge regime). For all the above-mentioned findings, this study demonstrates the need to consider hydrological changes when we analyze geochemical factors affecting metal concentrations, even in relatively unpolluted environments.

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Temporal variations of reservoir sediment sources in a small mountainous catchment in Korea

Kim

Onda

Yang

et al. 2013

Earth Surf Processes Landf

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An understanding of the temporal variation in reservoir sedimentation and identification of the main sources of sediment are necessary for the maintenance of sustainable reservoirs. For this purpose, field measurements, sampling, and fingerprinting of reservoir sediment were undertaken from July 2005 to November 2007. Source fingerprinting of reservoir sediment was conducted using cesium‐137 (137Cs). The relative contributions of gully bank and forest road, and forest floor material to reservoir sediment were calculated using a mixing model. Bank and forest road material, estimated to make up about 96% of the reservoir sediment, was the dominant source. Enormous reservoir sedimentation, which amounted to about 60% of the total reservoir sedimentation during the observation period, occurred during a heavy rainstorm with an 80‐year recurrence time. To maintain the sustainability of the reservoir in this study, therefore, temporal and spatial preparation strategies for heavy rainstorms and bank and forest road erosion should be considered. However, spatial information on sediment sources from 137Cs fingerprinting is limited. To better identify the sediment sources spatially and temporally, further studies applying soil erosion models and more detailed field studies are needed. Copyright © 2013 John Wiley & Sons, Ltd.

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Temporal changes in suspended sediment transport in an Atlantic catchment, NW Spain

Cited by 38 publications

References 32 publications

Seasonal Accumulation and Depletion of Local Sediment Stores of Four Headwater Catchments

Seasonal Accumulation and Depletion of Local Sediment Stores of Four Headwater Catchments

Baseflow and Runoff Event Metal Concentrations, Partition and Its Relation with Physicochemical Variables in an Agroforestry Catchment

Temporal variations of reservoir sediment sources in a small mountainous catchment in Korea

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