Gray, D. M.

10 items:

The cold regions hydrological model: a platform for basing process representation and model structure on physical evidence After a programme of integrated field and modelling research, hydrological processes of considerable uncertainty such as snow redistribution by wind, snow interception, sublimation, snowmelt, infiltration into frozen soils, hillslope water movement over permafrost, actual evaporation, and radiation exchange to complex surfaces have been described using physically based algorithms. The cold regions hydrological model (CRHM) platform, a flexible object-oriented modelling system was devised to incorporate these algorithms and others and to connect them for purposes of simulating the cold regions hydrological cycle over small to medium sized basins. Landscape elements in CRHM can be linked episodically in process-specific... Categories: Publication; Types: Citation; Tags: Baseline 3-Hydrological Datasets
Characterisation of Snowmelt Infiltration Scaling Parameters Within a Mountainous Subarctic Watershed This study considers the effects of spatial variability of driving variables on upscaling point estimates of snowmelt infiltration to frozen soil to the basin scale. Previous research led to the development of a parametric relationship between infiltration to frozen soil and soil temperature and moisture (water + ice) content at the onset of melt, and infiltration opportunity time (period of application of meltwater to soil). Reasonable success was achieved in field-testing the parametric relationship in forest, shrub and tundra sites in a mountainous, sub-arctic watershed in southern Yukon, Canada. It was determined that the primary governing parameters of snowmelt infiltration into frozen ground in this environment... Categories: Publication; Types: Citation; Tags: M2-Standardized Stream and Lake Information
Characterisation of Snowmelt Infiltration Scaling Parameters Within a Mountainous Subarctic Watershed This study considers the effects of spatial variability of driving variables on upscaling point estimates of snowmelt infiltration to frozen soil to the basin scale. Previous research led to the development of a parametric relationship between infiltration to frozen soil and soil temperature and moisture (water + ice) content at the onset of melt, and infiltration opportunity time (period of application of meltwater to soil). Reasonable success was achieved in field-testing the parametric relationship in forest, shrub and tundra sites in a mountainous, sub-arctic watershed in southern Yukon, Canada. It was determined that the primary governing parameters of snowmelt infiltration into frozen ground in this environment... Categories: Publication; Types: Citation; Tags: Monitoring 2-Standardized Stream and Lake Information
The cold regions hydrological model: a platform for basing process representation and model structure on physical evidence After a programme of integrated field and modelling research, hydrological processes of considerable uncertainty such as snow redistribution by wind, snow interception, sublimation, snowmelt, infiltration into frozen soils, hillslope water movement over permafrost, actual evaporation, and radiation exchange to complex surfaces have been described using physically based algorithms. The cold regions hydrological model (CRHM) platform, a flexible object-oriented modelling system was devised to incorporate these algorithms and others and to connect them for purposes of simulating the cold regions hydrological cycle over small to medium sized basins. Landscape elements in CRHM can be linked episodically in process-specific... Categories: Publication; Types: Citation; Tags: B3-Hydrological Datasets
Characterisation of Snowmelt Infiltration Scaling Parameters Within a Mountainous Subarctic Watershed This study considers the effects of spatial variability of driving variables on upscaling point estimates of snowmelt infiltration to frozen soil to the basin scale. Previous research led to the development of a parametric relationship between infiltration to frozen soil and soil temperature and moisture (water + ice) content at the onset of melt, and infiltration opportunity time (period of application of meltwater to soil). Reasonable success was achieved in field-testing the parametric relationship in forest, shrub and tundra sites in a mountainous, sub-arctic watershed in southern Yukon, Canada. It was determined that the primary governing parameters of snowmelt infiltration into frozen ground in this environment... Categories: Data, Publication; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Monitoring 2-Standardized Stream and Lake Information

ScienceBase brings together the best information it can find about USGS researchers and offices to show connections to publications, projects, and data. We are still working to improve this process and information is by no means complete. If you don't see everything you know is associated with you, a colleague, or your office, please be patient while we work to connect the dots. Feel free to contact sciencebase@usgs.gov.