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Keyword: snowmelt

The generation of spring peak flows by short-term meteorological events

Publications Posted on: August 14, 2015
Spring peak flows recorded over a 25-year period in Benton Creek, a small forested watershed in northern Idaho, were studied in their relation to meteorological events. More peak flows were generated by rain-on-snow than by clear-weather snowmelt; the two types of peaks differ in magnitude and in other characteristics.

Exploring uncertainty and model predictive performance concepts via a modular snowmelt-runoff modeling framework

Publications Posted on: July 28, 2015
Model selection is an extremely important aspect of many hydrologic modeling studies because of the complexity, variability, and uncertainty that surrounds the current understanding of watershed-scale systems. However, development and implementation of a complete precipitation-runoff modeling framework, from model selection to calibration and uncertainty analysis, are rarely confronted.

Variable flushing mechanisms and landscape structure control stream DOC export during snowmelt in a set of nested catchments

Publications Posted on: July 28, 2015
Stream DOC dynamics during snowmelt have been the focus of much research, and numerous DOC mobilization and delivery mechanisms from riparian and upland areas have been proposed. However, landscape structure controls on DOC export from riparian and upland landscape elements remains poorly understood.

Comparison of hydrologic predictions from the Variable Infiltration Capacity (VIC) model and the MC1 model to observed gage data in the region around the Shoshone National Forest

Documents and Media Posted on: July 09, 2015
Final report for a project conducting additional validations of outputs from the Variable Infiltration Capacity (VIC) model for the area around the Shoshone National Forest. Modeled predictions were compared to observed USGS gage data at selected locations. In addition, VIC model performance was compared to that of hydrologic outputs from MC1, a dynamic model that simulates vegetation, carbon, hydrology and fire processes. Document Type: White Papers

Evaluation of episodic acidification and amphibian declines in the Rocky Mountains

Publications Posted on: May 28, 2015
We define criteria for documenting episodic acidification of amphibian breeding habitats and examine whether episodic acidification is responsible for observed declines of amphibian populations in the Rocky Mountains.

Biogeochemical fluxes in the Glacier Lakes catchments

Publications Posted on: May 28, 2015
These lakes are moderately sensitive to acid deposition; acidification would require precipitation at least as acidic as that presently found in the more heavily impacted areas of eastern North America. Because most snowpack contaminants are released early in the melting process, seasonal acidification pulses would probably occur at much lower levels of acidic inputs.

Distribution and abundance of microbial biomass in Rocky Mountain spring snowpacks

Publications Posted on: May 28, 2015
Snowpacks in both Colorado and Wyoming were sampled on 15 dates for total microbial biomass, ratio of bacteria to fungi, and major inorganic ions. Levels of viable microbial biomass remained low throughout the period, peaking at 0.05 micrograms carbon/mi. Microscopic analyses indicated this biomass was composed primarily of bacteria. Fungi were not detected in samples taken at or above treeline.

Relationship of field and LiDAR estimates of forest canopy cover with snow accumulation and melt

Publications Posted on: April 10, 2013
At the Priest River Experimental Forest in northern Idaho, USA, snow water equivalent (SWE) was recorded over a period of six years on random, equally-spaced plots in ~4.5 ha small watersheds (n=10).

An evaluation of the hydrologic relevance of lateral flow in snow at hillslope and catchment scales

Publications Posted on: February 06, 2013
Lateral downslope flow in snow during snowmelt and rain-on-snow (ROS) events is a well-known phenomenon, yet its relevance to water redistribution at hillslope and catchment scales is not well understood. We used dye tracers, geophysical methods, and hydrometric measurements to describe the snow properties that promote lateral flow, assess the relative velocities of lateral flow in snow and soil, and estimate volumes of downslope flow.

Modeling topographic influences on fuel moisture and fire danger in complex terrain to improve wildland fire management decision support

Publications Posted on: February 24, 2012
Fire danger rating systems commonly ignore fine scale, topographically-induced weather variations. These variations will likely create heterogeneous, landscape-scale fire danger conditions that have never been examined in detail.