Effects of the 1997 Flood on the Transport and Storage of Sediment and Mercury within the Carson River Valley, West‐Central Nevada

Miller, Jerry R.; Barr, Robert C.; Grow, David; Lechler, Paul J.; Richardson, D. W.; Waltman, Karen; Warwick, John J.

doi:10.1086/314353

Cited by 65 publications

(54 citation statements)

References 6 publications

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“…Our nding stands in contradiction with results from other rivers, where ow magnitude was a factor of key importance [e.g. [40,[57][58][59][60]. Further, we found that ood magnitude could belong to the controlling variables in uencing rate of channel width change, as there was a positive correlation on the meander scale between Qmax and ∆W.…”

Section: Variables Controlling Planform Changescontrasting

confidence: 99%

Response of lateral channel dynamics of a lowland meanderingriver to engineering-derived adjustments - an example of theMorava River (Czech Republic)

Ondruch

Máčka

2015

Open Geosciences

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Freely meandering (quasi)natural reaches of lowland rivers represent a rare phenomenon in Central Europe. Increasing attention is currently being paid to the dynamics of quasi-natural (arti cially in uenced) meandering rivers as this attention represents the basic prerequisite for the development of appropriate restoration strategies on regulated rivers. This study focused on a 5.5 km long reach of the Morava River in the Strážnické Pomoraví region, Czech Republic that is characterised by quasi-natural evolution after substantial engineering adjustments were made in the rst decades of the twentieth century. Based on Geographic Information Systems (GIS) analysis of aerial photographs, the spatio-temporal dynamics of bank erosion and accretion rates were quantitatively described and variables that control channel migration rates were identi ed. High rates of lateral shifts were localised in high sinuosity segments (sinuosity 1.17-2.37), whereas segments with very low rates were straight or formed into slightly curved bends (sinuosity 1.05-1.18). As a key factor, engineering works that in uenced local river bed slope and induced a dramatic increase in bank erosion rates were identi ed. River engineering works induced a dramatic increase in bank erosion rate (2.19 m/year for 1938-53 and 1.47 m/year for 1953-63). An interval of approximately 25 years was needed before the erosion rates dropped back to values documented before river regulation (0.35-1.09 m/year for 1841-1938). Other important controlling variables included radius of curvature, frequency and magnitude of oods and, locally, river bank material properties and oodplain land cover.

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Section: Variables Controlling Planform Changescontrasting

confidence: 99%

Response of lateral channel dynamics of a lowland meanderingriver to engineering-derived adjustments - an example of theMorava River (Czech Republic)

Ondruch

Máčka

2015

Open Geosciences

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“…2B and Dataset S1), which apparently reflects Hg dilution through the mixing of mining and nonmining sediment, as observed in other fluvial systems (5,6). ii) Deposits that were recently reworked by channel incision/ migration have lower HgT than those that were not (compare Fig.…”

Section: Resultsmentioning

confidence: 70%

“…1A) remained in terrace storage >100 y after mining and hypothesized that modern floods are capable of transporting it downstream. Apart from Gilbert's classic work on bed-level change (10), generalizable theory for flood-based evolution of anthropogenic fans is absent, especially over the critical management time scale of decades to centuries in this and other fluvial systems (5,6). This precludes predictions of mining sediment exhaustion time scales and the downstream risks of heavy metal contamination to food webs.…”

mentioning

confidence: 99%

Enduring legacy of a toxic fan via episodic redistribution of California gold mining debris

Singer

Aalto

James

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

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Significance This paper is of fundamental interest to the millions of residents living at the downstream end of this and other global river basins beset by industrial metals mining. Sediment-bound Hg has contaminated food webs of the San Francisco Bay-Delta, but the dominant geographical sources of Hg to downstream ecosystems in this and similar river basins are debated. Likewise, the processes by which Hg is delivered to lowlands and the patterns of its floodplain deposition are poorly understood. This research addresses a gap in generic theory of postmining fan evolution that enables anticipation, prediction, and management of contamination risk to food webs.

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“…Predictions of S V positively correlate with TSS flux and are greatest within reaches of the Andes-Foreland Basin (t-tests: ↵ < 0.001; KW: ↵ <0.005; Supplementary Table 2). Oxbow alluviation can significantly enhance valley-wide sediment storage 29,30 , and our findings suggest that the addition of bed material to the channel should also increase the topographic and sedimentological complexity of the floodplain as a dynamic but steady-state planform develops and is maintained. The dynamism of the planforms within the sediment-rich rivers of the Andes-Foreland Basin indicates the great sensitivity of these river systems to the disruption of sediment supplies by large waterstorage reservoirs proposed for the Amazon Basin 5 .…”

mentioning

confidence: 63%

Sediment supply as a driver of river meandering and floodplain evolution in the Amazon Basin

et al. 2014

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Effects of the 1997 Flood on the Transport and Storage of Sediment and Mercury within the Carson River Valley, West‐Central Nevada

Cited by 65 publications

References 6 publications

Response of lateral channel dynamics of a lowland meanderingriver to engineering-derived adjustments - an example of theMorava River (Czech Republic)

Response of lateral channel dynamics of a lowland meanderingriver to engineering-derived adjustments - an example of theMorava River (Czech Republic)

Enduring legacy of a toxic fan via episodic redistribution of California gold mining debris

Sediment supply as a driver of river meandering and floodplain evolution in the Amazon Basin

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