NWT RESEARCH DATABASE

Principal Investigator: Quinlan, Roberto
Licensed Year(s): 2017 2016 2015 2014 2013
Summary: This study will examine the effects of permafrost and flooding on the ecological structure of contrasting lakes in the Mackenzie River Delta. Patterned ground marked by ice-wedge polygons is formed by freezing and thawing of the soil, which forms cracks into which ice can spread and cause the soil to uplift. These processes have effects on the hydrology and water chemistry of adjacent aquatic envi...

Principal Investigator: Tank, Suzanne E
Licensed Year(s): 2013 2012
Summary: This study will examine the solar degradation of riverine dissolved organic carbon (DOC) to carbon dioxide (CO2) throughout the Mackenzie River Delta. During the spring runoff peak just before summer solstice, ice-jam flooding inundates the Delta with river water, which spreads out in a relatively thin layer over an extended area and is exposed to 24-hour Arctic sunlight. This water is then slowly...

Principal Investigator: Hicks, Faye E
Licensed Year(s): 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004
Summary: The objective of this research project is to study ice processes on the Hay River in order to continue the ongoing development of computer models to predict them. In order to develop realistic models, it is important that the researchers have the opportunity to observe river breakup so as to have a full understanding of the physical context of the historical data. In addition, long term data re...

Principal Investigator: Lesack, Lance
Licensed Year(s): 2008 2007
Summary: The aims of the various components of this project are to develop a hydraulic model for the Mackenzie Delta by observation of ice jams for calibration of the model, assessing ice cover and breakup patterns, linking an ice-ocean-atmosphere model of storm surges to the hydraulic model, measuring water stored in off-channel areas, improving information on lake-flooding for off-channel areas, quantify...

Principal Investigator: Prowse, Terry D
Licensed Year(s): 2008 2007 2006 2005 2004
Summary: The objective of this study is to quantify the frequency and magnitude of ice jams in the Mackenzie River Delta; the hydroclimatic conditions controlling the occurrence of ice jams and associated floods; to develop a hydraulic model of ice jamming for the Mackenzie Delta, and to investigate the importance of deep scour holes in the Mackenzie River. Quarterly field trips are scheduled for mid-Ma...

Principal Investigator: Lesack, Lance
Licensed Year(s): 2017 2016 2015 2014 2010 2009 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993
Summary: The long-term goal of this project is to develop a biogeochemical model for lakes in the Mackenzie Delta, and ultimately, a more general ecosystem model for floodplains and deltas of major world rivers that will help assess the effects of multiple stresses on rivers resulting from global change. Numerous major river deltas in the Arctic circumpolar region are lake-rich because of thermokarst effec...

Principal Investigator: de Rham, Laurent
Licensed Year(s): 2004
Summary: It is known that extreme flood levels within the Mackenzie River Basin are caused by ice jamming events. Analysis of open water versus ice influenced water levels at several sites within the Mackenzie River Basin will provide further quantification of th...

Principal Investigator: Wolfe, Brent BBW
Licensed Year(s): 2007 2006 2005 2004 2003 2002
Summary: This project will formulate a history of the frequency and magnitude of floods and droughts and corresponding ecological responses in the Mackenzie Basin deltas over the past 1000 years. Fieldwork in 2003 will focus on assessing seasonal variability of l...

Principal Investigator: Sherstone, David A.
Licensed Year(s): 1993 1992 1991 1990 1988
Summary: Ice gauges are installed on river ice once the ice is strong enough to support researchers (20 gauges for the Mackenzie Delta and 15 gauges for Hay River). These gauges are read every 10 days to obtain total ice thickness, white ice thickness and snow depth. From these data, the rates of ice growth and decay can be calculated, and the approximate date of maximum ice thickness can be determined....

Principal Investigator: Prowse, Terry D
Licensed Year(s): 1987
Summary: To study river ice jams and break up in the Fort Simpson region, to study Mackenzie River and Delta ice break up as well as the water balance in Mackenzie Delta Lakes. To study snow-soil interactions near Resolute Bay....