Natasha Neumann

Ministry of Forests British Columbia

A method was developed to identify the snow sensitive zone (SSZ), the area contributing snowmelt during the peak flow period, for eight watersheds in the Kettle River basin. Snow covered area (SCA) was mapped at the onset of the peak flow period for 2010-2020. The SSZ was identified as the median SCA for this period. The SSZ maps can inform plannin...

With population growth, climate change, and increasing forest disturbance, understanding the complex relationships between forests and water is key to sustaining future forest resources, aquatic habitat, and water supplies. Research into forest and water interactions continues to expand our understanding of ecohydrological processes and our ability...

Streams in the Pacific Northwest (Oregon, Washington, British Columbia) face rising summer temperatures and increasing anthropogenic influence, with consequences for fish populations. Guidance is needed in small managed watersheds for setting reservoir release rates or for the restriction of water extractions to meet the needs of fish and aquatic e...

Salmonids commonly spawn in locations of upwelling vertical flow, but it is unclear whether this upwelling water is groundwater, river water which has spent some time flowing through the riverbed before re-emerging downstream, or some mixture of the two. Vertical specific discharge and riverbed water chemistry were monitored in spawning habitat of...

Studying uncertainties in hydrological modeling is necessary because of data scarcity or abundance and quality issues. These uncertainties can have significant effects on environmental decision making. Traditionally, probabilistic methods have been used to study uncertainties; however, recently, more comprehensive methods are used in the treatment...

Clear Lake is a medium-sized deep lake with high calcium concentrations and moderate levels of dissolved phosphorus located in Riding Mountain National Park in Manitoba, Canada. Development and agricultural activity in parts of the watershed outside of the park, as well as increased seasonal tourism demands and development within the park, have led...

Under the Mackenzie GEWEX Study, extensive snowmelt and runoff research was carried out at the Trail Valley and Havikpak Creek research basins at the tundra-forest transition zone near Inuvik, Northwest Territories. Process based research concentrated on snow accumulation, the spatial variability of energy fluxes controlling melt, local scale advec...

Snow cover is spatially heterogeneous at the local scale because of micro climatic, topographic and vegetative effects on snow accumulation, redistribution and ablation ‐ processes which vary between different environments. Automated, fixed point snow depth measurements are the norm at research as well as operational sites, and the ability of these...

The 1994/95 water year in the lower Mackenzie Valley was an extraordinary year hydrologically, with the important winter to summer transition being the earliest on record. Unlike more temperate areas, the northern water year is dominated, to a great extent, by this onset of spring which results in the melting of nearly half of the annual precipitat...

This paper considers the processes controlling the rapid drainage of ice-rich permafrost-dammed lakes. It is postulated that the primary process controlling lake drainage is the melting of ice-rich permafrost, in a manner similar to that controlling the drainage of glacier-dammed lakes. Two lakes are considered in the analysis: one that drained nat...

In agricultural, grassland, tundra and mountainous areas, patchy snow cover may occur for periods of many months. Although much is known about surface energy exchanges during periods of continuous snow cover, there are major gaps in our understanding of fluxes during periods when the land surface has both snow and snow-free patches. A boundary laye...

The spring landscape of the Arctic tundra is dominated by a snow cover which is highly variable in depth owing to redistribution by wind. Because of different energy dynamics, this heterogeneous land cover produces a horizontal transfer of energy at a small scale, a process termed local advection. An advection efficiency term (FS), which represents...

During snowmelt over a continuous snow cover, the vertical turbulent exchanges of sensible and latent energy are influenced by regional air-mass characteristics, which exert a strong control on air temperature. In high-latitude sites, the melting surface rapidly becomes heterogeneous, with patches of snow and snow-free areas. Local advection occurs...

During snowmelt over a continuous snow cover, the vertical turbulent exchanges of sensible and latent energy are influenced by regional air-mass characteristics, which exert a strong control on air temperature. In high-latitude sites, the melting surface rapidly becomes heterogeneous, with patches of snow and snow-free areas. Local advection occurs...