Low‐Temperature Effects on Flow in Sand‐Bed Streams

Hong, Rou‐Jai; Karim, M. Fazle; Kennedy, John F.

doi:10.1061/(asce)0733-9429(1984)110:2(109)

Cited by 27 publications

(6 citation statements)

References 4 publications

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“…Kinematic viscosity increases when water is cooling. Increasing viscosity may increase suspended sediment transport in certain conditions depending on sediment type and flow magnitude (Akalin, ; Hong, ; Taylor, ). In our data, a clear tendency is not observed that the wintertime water turbidities would be higher than during summer.…”

Section: Discussionmentioning

confidence: 99%

River ice cover influence on sediment transportation at present and under projected hydroclimatic conditions

et al. 2015

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Abstract:A large number of rivers are frozen annually, and the river ice cover has an influence on the geomorphological processes. These processes in cohesive sediment rivers are not fully understood. Therefore, this paper demonstrates the impact of river ice cover on sediment transport, i.e. turbidity, suspended sediment loads and erosion potential, compared with a river with ice-free flow conditions. The present sediment transportation conditions during the annual cycle are analysed, and the implications of climate change on wintertime geomorphological processes are estimated. A one-dimensional hydrodynamic model has been applied to the Kokemäenjoki River in Southwest Finland. The shear stress forces directed to the river bed are simulated with present and projected hydroclimatic conditions. The results of shear stress simulations indicate that a thermally formed smooth ice cover diminishes river bed erosion, compared with an ice-free river with similar discharges. Based on long-term field data, the river ice cover reduces turbidity statistically significantly. Furthermore, suspended sediment concentrations measured in ice-free and icecovered river water reveal a diminishing effect of ice cover on riverine sediment load. The hydrodynamic simulations suggest that the influence of rippled ice cover on shear stress is varying. Climate change is projected to increase the winter discharges by 27-77% on average by 2070-2099. Thus, the increasing winter discharges and possible diminishing ice cover periods both increase the erosion potential of the river bed. Hence, the wintertime sediment load of the river is expected to become larger in the future.

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Section: Discussionmentioning

confidence: 99%

River ice cover influence on sediment transportation at present and under projected hydroclimatic conditions

et al. 2015

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“…Breakup ice jams, on the other hand, often concentrate conveyance, scouring channels beneath the ice‐jam (Boucher et al, 2009; Derecki et al, 1986, Ettema, 2002). Additionally, water viscosity increases as water cools, which increases sediment transport (Ettema, 2007), by as much as an order of magnitude (Hong, Karim, & Kennedy, 1984). The impact of sediment processes on ice‐jam frequency has received less attention (Bergeron, Buffin‐Bélanger, & Dubé, 2011; Lindenschmidt & Chun, 2013).…”

Section: Introductionmentioning

confidence: 99%

Incorporating sediment non‐stationarity into ice‐affected flood‐risk projections

Gibson

Vuyovich

Weidel

2020

River Research & Apps

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Sediment deposition and ice jams can both increase river stages. Ice and sediment both reduce channel conveyance, affecting the flow‐stage relationship and flood risk. Classic hydrologic statistics systemically under‐predict flood risk in depositional rivers or reaches with frequent ice jams. However, when both processes influence not only flood stage but each other, the interacting processes can complicate flood risk assessment. The Big Rapids reach of the Muskegon River developed ice jams in at least 16 of the last 81 years and is actively aggrading. In reaches like this, contemporary flood risk analysis must consider ice impacts (often without local gage data) and future flood risk analysis must consider of the non‐stationary impacts of deposition on channel capacity and ice‐jam frequency. This work used hydraulic, ice jam, and sediment transport models to calculate contemporary, ice‐affected flood risk (without local stage data) and quantify the impact of deposition on future ice jams and flood risk. Accounting for ice jams increased the flood stage associated with the 1% annual flood by 0.5‐1.1 m. Sediment deposition increased future flood risk between 0.06 m (on the topset slope of a reservoir delta) and 2 m (at the advancing foreset slope).

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“…et al, 2010;Whitehead, 2009). Additionally, rising temperatures may affect the rate at which sediment flows in streams and rivers (Hong, 1984;Li et al, 2011;Straub, 1958). This effect of water temperature on sediment transport potential is unclear and is the focus of this current study.…”

Section: Hydrology-watershed-river Interactionmentioning

confidence: 99%

“…The concept of ecosystem health adopted here is defined by Meyer (1997) as "sustainable and resilient, maintaining its ecological structure and function over time while continuing to meet societal needs and expectations." Although much progress investigating the sediment flow process has been made, the effect of water temperature on sediment transport is unclear and often times contradictory (Akalin, 2006;Hong, 1984). Many of the variables and parameters that govern transport and deposition characteristics of sediment are in need of research (Chaplot, 2007).…”

Section: A Small Piece Of a Complex Systemmentioning

confidence: 99%

“…Research on water temperature effects on sediment transport started in the late 1930's; however, at the time, both lab and field investigations often reported conflicting results (Akalin, 2006;Hong, 1984). For instance, Ho (1939) determined that at colder water temperatures more bed particles were transported, whereas Mostafa (1949), reported that warmer water temperatures carry more bed sediment than colder temperatures.…”

Section: Research On Water Temperature and Sediment Transportmentioning

confidence: 99%

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The Effect of Water Temperature on in-Stream Sediment Concentration and Transport Rate

Tyrrell

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Low‐Temperature Effects on Flow in Sand‐Bed Streams

Cited by 27 publications

References 4 publications

River ice cover influence on sediment transportation at present and under projected hydroclimatic conditions

River ice cover influence on sediment transportation at present and under projected hydroclimatic conditions

Incorporating sediment non‐stationarity into ice‐affected flood‐risk projections

The Effect of Water Temperature on in-Stream Sediment Concentration and Transport Rate

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