Wind-forced seiche events on Great Slave Lake: hydrologic implications for the Slave River Delta, NWT, Canada

2006 ◽  
Vol 20 (19) ◽  
pp. 4051-4072 ◽  
Author(s):  
J. T. Gardner ◽  
M. C. English ◽  
T. D. Prowse
Keyword(s):  
River Delta ◽  
Great Slave Lake ◽  
Slave River Delta

Slave River delta: geomorphology, sedimentology, and Holocene reconstruction

1988 ◽  
Vol 25 (12) ◽  
pp. 1990-2004 ◽  
Author(s):  
Sandy Vanderburgh ◽  
Derald G. Smith
Keyword(s):  
River Delta ◽  
Delta Front ◽  
Average Width ◽  
Sand Waves ◽  
Isostatic Rebound ◽  
Great Slave Lake ◽  
Sand Body ◽  
Fort Smith ◽  
River Rapids ◽  
Slave River Delta

The Holocene Slave River delta (8300 km2) is a long (170 km), narrow (42 km average width) alluvial sand body, which extends north from the Slave River rapids at Fort Smith to Great Slave Lake, Northwest Territories. The delta is flanked by the Talston and Tethul rivers and Canadian Shield to the east and by the Little Buffalo River to the west. Wave-associated sedimentary structures in lithostratigraphic logs from river cutbanks indicate that the sandy delta was wave influenced. Most of the logs (34) consist of three facies: basal laminated mud (unknown thickness), interbedded mud and sand (2.5 m), and planar-tabular ripple sets interbedded with cross-laminated to flat-bedded sand (3.0–14.5 m).Eleven radiocarbon-dated wood samples from river cutbanks were used to reconstruct the delta paleoshoreface and to calculate the rate of progradation, which averaged 20.7 m/year from 8070 BP to the present. In the same period isostatic rebound of the delta region relative to the Liard River delta averaged 12 cm/km (a total rebound of 48 m). The data were calculated normal to the retreating Laurentide ice front.From the surface to depths of 59 m, the subaerial and subaqueous delta front exhibits barrier islands, lagoons, offshore bars or sand waves, tensional cracks, slumps and pressure ridges. The barriers and offshore bars consist of medium grain-sized sand, whereas the slumps and pressure ridges are interpreted as mud.

Multi-year landscape-scale assessment of lakewater balances in the Slave River Delta, NWT, using water isotope tracers

2009 ◽  
Vol 379 (1-2) ◽  
pp. 81-91 ◽  
Author(s):  
Bronwyn E. Brock ◽  
Yi Yi ◽  
Kenneth P. Clogg-Wright ◽  
Thomas W.D. Edwards ◽  
Brent B. Wolfe
Keyword(s):  
Landscape Scale ◽  
River Delta ◽  
Isotope Tracers ◽  
Scale Assessment ◽  
Water Isotope ◽  
Slave River Delta

Incorporating the effects of upstream ice jam releases in the prediction of flood levels in the Hay River delta, Canada

2017 ◽  
Vol 44 (8) ◽  
pp. 643-651 ◽  
Author(s):  
Michael De Coste ◽  
Yuntong She ◽  
Julia Blackburn
Keyword(s):  
River Delta ◽  
Regression Analyses ◽  
Ice Jams ◽  
One Dimensional ◽  
Release Wave ◽  
Ice Jam ◽  
Great Slave Lake ◽  
Extreme Flooding ◽  
Flooding Events ◽  
The Town

The town of Hay River, located in the Northwest Territories, Canada, is vulnerable to ice jam flooding occurring in the adjacent Hay River delta. The most extreme flooding events have occurred when ice jams in the channels of the delta were pushed downstream towards the mouth at Great Slave Lake. This movement has been linked to incoming waves from ice jam release in the upstream reaches of the Hay River. This study incorporated the effect of an upstream ice jam release wave into the prediction of ice jam caused flood levels in the delta by integrating three one-dimensional models. The method was validated with observed breakup events and then used to simulate various combinations of ice and water conditions in the river and the delta. Multiple linear regression analyses were applied to the results to develop a prediction tool for assessing ice jam flood risk.

Spatial and temporal perspectives on spring break-up flooding in the Slave River Delta, NWT

2008 ◽  
Vol 22 (20) ◽  
pp. 4058-4072 ◽  
Author(s):  
B. E. Brock ◽  
B. B. Wolfe ◽  
T. W. D. Edwards
Keyword(s):  
River Delta ◽  
Spring Break ◽  
Break Up ◽  
Slave River Delta

A geospatial model to determine patterns of ice cover breakup along the Slave River

2015 ◽  
Vol 42 (9) ◽  
pp. 675-685 ◽  
Author(s):  
Karl-Erich Lindenschmidt ◽  
Apurba Das
Keyword(s):  
Temporal Patterns ◽  
Ice Cover ◽  
River Delta ◽  
Clear Understanding ◽  
Spatial And Temporal Patterns ◽  
River Flooding ◽  
Ice Breakup ◽  
Flood Magnitude ◽  
Dry Conditions ◽  
Slave River Delta

Spring floods have become less frequent along the Slave River and Slave River Delta. As a result, prolonged dry periods have occurred leading to an influx of invasive vegetation more tolerant to dry conditions (e.g., willows). Ice cover breakup and ice jamming can be important mechanisms in river flooding. A clear understanding of spatial and temporal patterns of the spring ice cover breakup along the Slave River could identify possible causes of reduced flood magnitude and frequency in the Slave River Delta. Few attempts have been made to examine the patterns of ice cover breakup along this river. A geospatial model has been introduced in this study to pinpoint the most likely areas of breakup initiation and persistent ice and ice cover at the end of the breakup period along the river. Relatively narrow river sections are responsible for initiation of breakup and relatively wide sections of the river have a strong predisposition for persistent ice along the Slave River. Daily time series of MODIS satellite images acquired from different years were used to examine the spatial and temporal patterns of ice breakup along the Slave River. In addition to geomorphological influence, air temperature and flow conditions also have strong impacts on the spatial and temporal patterns of the ice cover breakup.

scholarly journals From Isotopes to TK Interviews: Towards Interdisciplinary Research in Fort Resolution and the Slave River Delta, Northwest Territories

ARCTIC ◽  
2009 ◽  
Vol 60 (1) ◽  
Author(s):  
Brent B. Wolfe ◽  
Derek Armitage ◽  
Sonia Wesche ◽  
Bronwyn E. Brock ◽  
Michael A. Sokal ◽  
...  
Keyword(s):  
Northwest Territories ◽  
Interdisciplinary Research ◽  
River Delta ◽  
Slave River Delta
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