Filters: Tags: B3-Hydrological Datasets (X)
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Subarctic woodlands comprise stands of spruce trees with varying degrees of openness, giving rise to large contrasts in melt rates within the forest. The spatial variability of the changing snow depth during a melt season was investigated at three scales (2, 4 and 16 m), using an example from a site in Yukon, Canada, where the computation of snowmelt takes into account the differential rates within the woodland. During the melt period, the mean daily snow depth decreases but the variability increases as continued ablation leads to greater unevenness of the snow cover. At the three scales of representation, increasing the grid size results in a reduction in the standard deviation and the skewness of depth distribution....
Categories: Publication;
Types: Citation;
Tags: B3-Hydrological Datasets,
M2-Standardized Stream and Lake Information
Categories: Publication;
Types: Citation;
Tags: B3-Hydrological Datasets,
M2-Standardized stream and lake information-1
Copyright (2008), Wiley Periodicals, Inc.
Categories: Publication;
Types: Citation;
Tags: B3-Hydrological Datasets,
M1-Changes in Plant and Animal Distributon,
M3-Improve Permafrost Mapping,
Modeling,
and Monitoring
A suite of subglacial water-pressure records from the 1996 summer field season at Trapridge Glacier, Yukon Territory, Canada, discloses a hydraulic event that cannot readily be explained by known forcings. We suggest that these records indicate covert failure of the pressure sensors caused by at least one large water-pressure pulse. The sign and magnitude of the pulse appears to have varied spatially and the pulse duration was less than the 2 min sampling interval of our data loggers. Laboratory experiments support this interpretation and indicate that the pulse magnitude exceeded 900 m of hydraulic head, roughly 15 times the ice-overburden pressure. Within glaciers, large water-pressure pulses can be generated...
This paper provides an introduction to the role of groundwater in watersheds, presents an overview of groundwater resources in British Columbia, and reviews the potential effects of forest management activities (e.g., harvest operations, road building, reforestation, management of mountain pine beetle infestation) on groundwater hydrology. A regional-scale classification of hydrogeologic landscapes for British Columbia is outlined, integrating major physiographic, biogeoclimatic, and groundwater regions. The classification considers characteristics of climate, geology, aquifer type, and interaction with surface water in a generalized way, and summarizes broad-scale expectations about the groundwater hydrology in...
Categories: Publication;
Types: Citation;
Tags: B3-Hydrological Datasets,
R2a-Impact Climate Change Vegatation and Subsistence
Hydrometric monitoring in northern Canada, as in much of the country, was reduced during the mid-1990s in response to fiscal pressures on the federal government. This study uses a combination of canonical correlation and multiple regression analysis to quantify the influence of discontinuing these gauges on prediction of ungauged streamflows in the region. Thirty-four stations in the Mackenzie Basin measuring streamflow from catchments in the Yukon, the Northwest Territories, northern Alberta and northern British Columbia were selected for the analysis. Twelve of the 34 stations are now closed. The difference in the predictive capability, as determined by a jack-knife procedure, between using only the active stations...
Categories: Publication;
Types: Citation;
Tags: B1-High Resolution Land Cover Imaging,
B3-Hydrological Datasets
Summary This study represents the first attempt to examine the spatial and seasonal variations of the surface water budget by using state-of-the-art datasets for sixteen large Canadian drainage basins with a total area of 3.2 million km2. The datasets used include two precipitation grids produced using measurements and reanalysis models, land surface evapotranspiration and water surface evaporation estimated using the EALCO model, streamflow measured at hydrometric stations, and total water storage change derived from GRACE satellite observations. The monthly water imbalance resulted from these datasets varied from 7.0 mm month−1 to 21 mm month−1 among the studied basins, which was 30% on average of the corresponding...
Categories: Publication;
Types: Citation;
Tags: B3-Hydrological Datasets,
M2-Standardized Stream and Lake Information
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