Twenty-first century discharge and sediment yield predictions in a small high Arctic watershed

Lewis, Ted G.; Lamoureux, Scott F.

doi:10.1016/j.gloplacha.2009.12.006

Cited by 40 publications

(45 citation statements)

References 59 publications

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“…Research conducted in melt seasons 2012-2013 as well as study results from the years 1986-2009 confirm the constant increasing trend anticipated for small glacial catchments of Arctic archipelagos by Lewis and Lamoureux (2010). A characteristic feature of such changes are greater discharge fluctuations -daily, seasonal, as well as multiannual.…”

Section: Discussionsupporting

confidence: 62%

“…A growing tendency for mean annual discharges predicted for Arctic Archipelago by Lewis and Lamoureux (2010) and determined in the scope of a field study (Killingtveita et al 2003, Majchrowska et al 2015 was also observed in the analysed river, where mean discharge increase amounted to approximately 60% over a 27-year period (Fig. 7).…”

Section: Discussionsupporting

confidence: 59%

“…Peterson et al 2002, Syvitski 2002, Gordeev 2006, Hasholt et al 2006, Holland et al 2007. during the 21st century, Lewis and Lamoureux (2010) predicted increases in runoff in a small catchment in the Canadian Arctic Archipelago, resulting in greater discharge variability. The general growth trend was confirmed by the results of a current study in the proglacial Scott River.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Runoff Variability in the Scott River (SW Spitsbergen) in Summer Seasons 2012–2013 in Comparison with the Period 1986–2009

Franczak

Kociuba

Gajek

2016

Quaestiones Geographicae

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River runoff variability in the Scott River catchment in the summer seasons 2012 and 2013 has been presented in comparison to the multiannual river runoff in 1986-2009. Both in particular seasons and in the analysed multiannual, high variability of discharge rate was recorded. In the research periods 2012-2013, a total of 11 952 water stages and 20 flow rates were measured in the analysed cross-section for the determination of 83 daylong discharges. The mean multiannual discharge of the Scott River amounted to 0.96 m 3 ·s -1 . The value corresponds to a specific runoff of 94.6 dm 3 ·s -1 ·km 2 , and the runoff layer 937 mm. The maximum values of daily discharge amounted to 5.07 m 3 ·s -1 , and the minimum values to 0.002 m 3 ·s -1 . The highest runoff occurs in the second and third decade of July, and in the first and second decade of August. The regime of the river is determined by a group of factors, and particularly meteorological conditions affecting the intensity of ablation, and consequently river runoff volume. We found a significant correlation (0.60 in 2012 and 0.67 in 2013) between the air temperature and the Scott River discharge related to the Scott Glacier ice melt.

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Section: Discussionsupporting

confidence: 62%

Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Runoff Variability in the Scott River (SW Spitsbergen) in Summer Seasons 2012–2013 in Comparison with the Period 1986–2009

Franczak

Kociuba

Gajek

2016

Quaestiones Geographicae

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“…From July 2007 to August 2008, sediment sourced from active layer detachments increased sediment availability at low Q. After Lewis and Lamoureux (2010), fig. 9.…”

Section: Water Temperaturementioning

confidence: 98%

“…7). Empirical modelling of sediment yields in West River under two climate change scenarios predicted that sediment yields would increase by 100%-600% by the end of the century (Lewis and Lamoureux 2010). Therefore, contributions to density from river SSC are expected to greatly increase in the future.…”

Section: Suspended Sediment Concentrationmentioning

confidence: 99%

Hyperpycnal flows control the persistence and flushing of hypoxic high conductivity bottom water in a High Arctic lake

et al. 2017

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Abstract:In the deepest portions of many lakes, zones of high-conductivity bottom water (HCBW) depleted in dissolved oxygen (DO) are present. HCBW and DO are important for determining benthic diversity and abundance, nutrients, and contaminant cycling and understanding the long-term evolution of lakes. We investigate the persistence and removal of HCBW and DO replenishment in a High Arctic lake using physical properties and flow velocity data along with hydrometric and suspended sediment inflow data over a 4 year monitoring period (2007)(2008)(2009)(2010) , inflowing river water was periodically denser than lake water; however, HCBW was not removed in these years. Hyperpycnal flows were likely either of insufficient strength or duration, deposited on the delta front, or followed paths that led away from the deepest portion of the lake. Results suggest that hyperpycnal flow frequency will increase and HCBW persistence will decrease with projected climate change due to an increase in fluvial SSC inflow. Water density changes resulting from increased electrical conductivity and water temperature are not likely to have a similarly large effect on hyperpycnal flow frequency and HCBW.

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Suspended sediment deposition and sediment yields at Lake Peters, northeast Brooks Range, Alaska: Fluvial‐ and lake‐based approaches

Thurston

Schiefer

McKay

et al. 2023

Earth Surf Processes Landf

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Lake‐based studies can provide seasonal‐ to millennial‐scale records of sediment yield to improve our understanding of catchment‐scale sediment transfer and complement shorter fluvial‐based sediment transport studies. In this study, sediment accumulation rates at 40 coring locations in Lake Peters, Brooks Range, Alaska, over ca. 42 years, calculated using fallout radionuclides and sediment density patterns, were spatially modelled based on distance from the primary inflow and lake water depth. We estimated mean interdecadal specific sediment yield (Mg km−2 year−1) using the spatially modelled sediment accumulation rates and compared that result to fluvial‐based sediment delivery for 2015–2016 open‐channel seasons, as well as to yields reported for other Arctic catchments. Using the lake‐based method, mean yield to Lake Peters between ca. 1973 and 2015 was 52 ± 12 Mg km−2 year−1, which is comparable with fluvial‐based modelling results of 33 (20–60) Mg km−2 year−1 in 2015 and 79 (50–140) Mg km−2 year−1 in 2016 (95% confidence intervals), respectively. Although 2016 was a year of above average sedimentation, the last extreme depositional event probably occurred between ca. 1970 and 1976 when a basal layer of fine sand was deposited in a broadly distributed, relatively thick and coarse bed, which we used for lake‐wide correlation. The dual lacustrine–fluvial method approach permits study of within‐lake and catchment‐scale processes. Within Lake Peters, sedimentation patterns show decreasing fluxes down‐lake, sediment bypassing near the primary inflow, the influence of secondary inflows and littoral redistribution, and a focusing effect in the deep proximal basin. At the watershed scale, sediment yield is largely driven by intense summer rainfall and strong seasonal hydroclimatic variability. This research informs paleo‐environmental reconstruction and environmental system modelling in Arctic lake catchments.

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Twenty-first century discharge and sediment yield predictions in a small high Arctic watershed

Cited by 40 publications

References 59 publications

Runoff Variability in the Scott River (SW Spitsbergen) in Summer Seasons 2012–2013 in Comparison with the Period 1986–2009

Runoff Variability in the Scott River (SW Spitsbergen) in Summer Seasons 2012–2013 in Comparison with the Period 1986–2009

Hyperpycnal flows control the persistence and flushing of hypoxic high conductivity bottom water in a High Arctic lake

Suspended sediment deposition and sediment yields at Lake Peters, northeast Brooks Range, Alaska: Fluvial‐ and lake‐based approaches

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