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Keyword: modeling

Validation of the Unit Stream Power Erosion and Deposition (USPED) Model at Fort Hood, Texas

Publications Posted on: December 11, 2020
Soil erosion has been recognized as a significant environmental malady in the United States for over 200 years. Numerous attempts have been made to model and quantify the issue, yet significant issues remain that hinder the accuracy and effectiveness of such models.

Location, Location, Location. Scale, Scale, Scale: Mexican Spotted Owl Habitat

Documents and Media Posted on: December 05, 2020
Rocky Mountain Research Station scientists use modeling to help untangle the layers of complexity among these relationships in order to gain insights about the Mexican spotted owl that would be impossible to obtain otherwise.  Document Type: Other Documents

Downscaling surface wind predictions from numerical weather prediction models in complex terrain with a mass-consistent wind model

Publications Posted on: October 28, 2020
Wind predictions in complex terrain are important for a number of applications. Dynamic downscaling of numerical weather prediction (NWP) model winds with a high-resolution wind model is one way to obtain a wind forecast that accounts for local terrain effects, such as wind speedup over ridges, flow channeling in valleys, flow separation around terrain obstacles, and flows induced by local surface heating and cooling.

Toward DNA-based and bioclimatic modeling tools to identify Armillaria pathogens, predict host/pathogen distributions, and manage Armillaria root disease in the Intermountain Region under changing environments

Publications Posted on: September 30, 2020
Armillaria root disease is one of the leading causes of growth loss and mortality in coniferous forests of the western USA (Lockman & Kearns 2016). Recent surveys suggest Armillaria root disease is increasing on trees in Utah (John Guyon, per. comm.).

The Fire and Tree Mortality Database, for empirical modeling of individual tree mortality after fire

Publications Posted on: June 22, 2020
Wildland fires have a multitude of ecological effects in forests, woodlands, and savannas across the globe. A major focus of past research has been on tree mortality from fire, as trees provide a vast range of biological services. We assembled a database of individual-tree records from prescribed fires and wildfires in the United States.

Hundred year projected carbon loads and species compositions for four National Forests in the northwestern USA

Publications Posted on: May 15, 2020
Forests are an important component of the global carbon balance, and climate sensitive growth and yield models are an essential tool when predicting future forest conditions. In this study, we used the dynamic climate capability of the Forest Vegetation Simulator (FVS) to simulate future (100 year) forest conditions on four National Forests in the northwestern USA: Payette National Forest (NF), Ochoco NF, Gifford Pinchot NF, and Siuslaw NF.

Biomass flow in western forests: Simulating the effects of fuel reduction and presettlement restoration treatments

Publications Posted on: December 23, 2019
Fuel treatment silviculture and the resulting long-term flow of biomass were examined using data from selected western stands. An uneven-aged management regime with reserve trees was modeled, using a canopy closure of 40 percent for the dominant trees as a target and a harvest cutting cycle of 20 years. Fuel reduction treatments in currently overstocked stands resulted in an initial peak of removal for the first and second cutting cycles.

Projections of forest and rangeland condition indicators for a national assessment

Publications Posted on: December 16, 2019
This paper discusses projections of emerging geographic areas of concern with regard to forest and rangeland condition, as indicated by a model based on a set of independent econometric production functions for condition indicators at the national scale.

Strategic application of wildland fire suppression in the southwestern United States

Publications Posted on: October 02, 2019
Much of the western United States is experiencing longer fire seasons with an increased frequency of high-severity fires and fire risk. Fire managers in the southwestern United States have increased efforts to reduce fire risk by managing more fires to meet resource objectives (e.g. thin forests, reduce hazardous fuel loads, and restore the landscape).

Fine-scale assessment of cross-boundary wildfire events in the western United States

Publications Posted on: October 02, 2019
We report a fine-scale assessment of cross-boundary wildfire events for the western US. We used simulation modeling to quantify the extent of fire exchange among major federal, state, and private land tenures and mapped locations where fire ignitions can potentially affect populated places. We examined how parcel size affects wildfire transmission and partitioned the relative amounts of transmitted fire between human and natural ignitions.