USDA Forest Service

Pacific Southwest Research Station

 
Pacific Southwest
Research Station

800 Buchanan Street
Albany, CA 94710-0011
(510) 883-8830
United States Department of Agriculture Forest Service. USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.

Publications and Products

Tools and data

  • A graphic generated by the R-package.
    Standview: A Density Management Diagram Generator in R

    Forest density metrics are often presented graphically in the form of a density management diagram. These diagrams vary by species and are useful for such tasks as evaluating risk from bark beetle attack or optimizing thinning regimes.

    A new open-source software package titled "standview" was written in R and distributed via github to allow forest managers or researchers to quickly develop high-resolution graphic images. The package will generate customizable graphics for many tree species and can be easily switched from English units to metric.

  • Cover image of Pacific Southwest Research Station's General Technical Report 253.
    Urban Tree Database

    A resource for city planners and urban foresters to more precisely select tree species.

    General Technical Report 253: Urban Tree Database and Allometric Equations and the corresponding database catalogs projected tree growth tailored to specific geographic regions. The products are a culmination of 14 years of work that analyzed more than 14,000 trees across the United States. Whereas prior growth models typically featured only a few species specific to a given city or region, the newly released database features 171 distinct species across 16 U.S. climate zones. The trees spanned a range of ages with data collected from a consistent set of measurements.

    Advances in statistical modeling have given the projected growth dimensions a level of accuracy never before seen. Moving beyond calculating a tree’s diameter or age to determine expected growth, the research incorporates 365 sets of tree growth equations. Also, the manual provides species-specific data on foliar biomass that is critical to projecting uptake of air pollutants.

  • Screenshot from the watershed decision support tool.
    Watershed decision support tool for managing invasive species on Hawaiʻi Island

    The Pacific Southwest Research Station recently developed a decision support tool for the windward coast of Hawaiʻi Island to prioritize catchments for invasive plant removal and native forest protection from new introductions. The model integrates modeled estimates of catchment-level water flows under various future climate and invasion scenarios, as well as data on biodiversity, stream habitat quality, and other management-related factors including access constraints and costs of treatment. This web application allows users to view mapped data used in the modeling and to directly tailor the decision model based on their conservation goals. This web application is a companion to the article "A watershed decision support tool for managing invasive species on Hawai‘i Island, USA."

  • Recent data measured from the Caspar Creek watershed.
    Caspar Creek Experimental Watersheds data

    The Caspar Creek Experimental Watersheds provide information to extend basic knowledge and guide land management practices.

    For more than 50 years, records from the North and South Forks of Caspar Creek have provided long-term hydrologic data from small, rain-dominated watersheds located in second and third-growth conifer forests. Data files include: streamflow; sediment; rainfall; solar; air and water temperature; channel cross-sections; subsurface hydrology; and detailed streamflow and sediment data for 13 tributary stations that were installed in the North Fork in August 1985.

  • Screen capture of the FireBusterSim application.
    Fire weather forecasting

    Pacific Southwest Research Station scientists have developed an experimental system called FireBuster* to streamline and automate many intermediate modeling processes to support fire weather forecasting. Fire meteorologists and fire managers can use Firebuster to readily acquire real-time, 72-hour fire weather forecasts at 5-km (3-mile) and 1-km (0.6-mile) resolution over Southern California (the current experimental area). Partners at the Southern California Geographical Area Coordinate Center are testing FireBuster, and researchers are assessing the accuracy and usefulness of its downscaled (locally applicable) forecast capability. FireBusterSim** is a complementary tool that provides downscaled fire weather simulations rather than forecasts.

Research Data Archive

More data available at the Forest Service Research Data Archive

  • 1) Caspar Creek Experimental Watersheds Phase 1 (1962-1985) data (2nd Edition)
    This data publication contains all Phase 1 data: 1) volumetric discharge data from the North Fork weir from 03 November 1962 to 31 July 1985, 2) annual pond deposition volumes for the weir collection ponds directly upstream of the North Fork and South Fork weirs from 1962-1985 (deposited material includes sediment and organic debris, and 3) suspended sediment concentrations collected at the North Fork weir 1962-1985.
  • 2) Caspar Creek Experimental Watersheds Phase 2 (1985-2017) data (2nd Edition)
    This data publication contains all Phase 2 data: 1) water depth (stage) and volumetric discharge data from the North Fork weir from August 1985 to July 2017 as well as for one sub-watershed gauging station (XYZ) from November 1999 to July 2017 and stage data for one other sub-watershed (Arfstein) from August 1985 to July 2017; 2) annual pond deposition volumes for the weir collection ponds directly upstream of the North Fork and South Fork weirs from 1986 to 2017; 3) suspended sediment concentrations collected at the North Fork weir, Arfstein rated section, and XYZ flume during from 1985 to 2017; and 4) bedload transport rates measured during thirteen storms (stage > 2 feet at the North Fork weir) from 1988 to 1995 on the North Fork mainstem at the Arfstein gauging station.
  • 3) Stanislaus-Tuolumne Experimental Forest ‘Methods of Cutting’ study plots 8-11: 88+ years of forest composition
    To study the effects of different logging methods on composition and growth of stands, early U.S. Forest Service scientists, including silviculturist Duncan Dunning, established ‘Methods of Cutting’ (MOC) plots in forest stands of varying composition and productivity throughout California. Four of these plots, all fully or partially on what is now the Stanislaus-Tuolumne Experimental Forest (Stanislaus National Forest), were established in old-growth mixed conifer stands in 1928 and 1929.
  • 1) Data for firebrands generated from selected structural fuels: Joint Fire Science Program project (15-1-04-4)
    In order to have a better understanding of statistical distribution of firebrands' mass, size (projected area), and traveling distance, full-scale firebrand generation experiments were conducted. Full-scale structural components (fence, corner, and roof) and their assemblies were built from typical residential building construction materials. The samples were ignited and exposed to realistic gusty wind traces in a wind tunnel facility in the Insurance Institute for Business & Home Safety (IBHS) Research Center located in Richburg, South Carolina.
  • 2) Data for firebrands generated from selected vegetative fuels: Joint Fire Science Program project (15-1-04-4)
    This data publication reports the experimental data of firebrands (or embers) generated from five vegetative fuels under gusty winds in a full-scale wind tunnel facility. Criteria for the selection of wildland vegetative fuels were: (1) They should be representative of typical wildland vegetative fuels in the U.S. that are prone to ignition and firebrand generation; (2) They should be accessible to experimental teams in North Carolina and South Carolina at reasonable costs.
  • 3) Camera trap photographs from American pika haypiles in California
    This image archive provides access to a reference collection of photographs from camera traps set at ten different American pika (Ochotona princeps) haypile sites in the eastern Sierra Nevada and spur ranges in Mono County, California during a 2014-2019 occupancy and activity study. Collection includes examples of various pika behaviors documented during study, such as haying, foraging, eating, cheek-rubbing, territorialism and kleptoparasitism; day and night, and during summer, fall and winter. Also includes example photographs of the 25 other mammal species and 10 bird species documented visiting the pika haypiles.
  • 1) Kings River Experimental Watersheds streamwater chemistry
    The Kings River Experimental Watersheds (KREW) is a long-term research project in the mixed-conifer forest of the Sierra Nevada that began in the early 2000's. The project is located in the headwaters of the Kings River on the Sierra National Forest, northeast of Fresno, California. The project has a paired-watershed design with two groups of watersheds (sites). The two sites are called Providence Creek and Bull Creek. Part of the Teakettle Experimental Forest is in the Bull Creek site.
  • 1) Ambient soil temperatures in prescribed burned ponderosa pine forests at Fort Valley Experimental Forest, Arizona
    The hourly temperature in the soil at three depths beneath the forest floor of ponderosa pine stands subjected to periodic prescribed burning was measured during one growing season from May until November, 1986 at the Fort Valley Experimental Forest in northern Arizona. Temperatures were measured in 3-day periods at a subset of locations and then the recording devices were moved to a different subset so the measurements at a particular location were separated by about 4 weeks. Additional hourly data from an onsite weather station for air temperature, solar intensity, and precipitation, as well as forest floor depth (6 samples measured above soil temperature site) are included as separate files to assist in site characterization.
  • 2) Low-density polyethylene smoke emissions from simulated debris piles
    This data publication contains emission factors for 195 gaseous and particulate compounds measured during the burning of three mixtures of manzanita wood and low-density polyethylene plastic (LDPE, agricultural plastic) in a laboratory. The mixtures consisted of 2 kilograms (kg) of manzanita wood paired with 0, 5 or 50 grams (gm) LDPE. Mixtures were burned in a basket and smoke was collected above the fire. A total of nine fires (3 mixtures x 3 replications) were burned on Nov. 4, 2008 using a randomized complete block design. Smoke emitted from the fires was concentrated into a small stack system from which gas and particulate samples were extracted. Various filters and real-time instruments were used to collect the emissions.
  • 3) Kings River Experimental Watersheds meteorology data
    The Kings River Experimental Watersheds (KREW) project is a long-term forest management study that began in the early 2000's. KREW is comprised of 10 headwater catchments of the Kings River Basin within the Sierra National Forest, California. Four meteorological stations are located within KREW at elevations of 1730 meters (lower Providence), 1950 meters (upper Providence), 2160 meters (lower Bull) and 2400 meters (upper Bull). This data publication contains level 1a (i.e. quality controlled but no gap filling) snow depth, snow water equivalent, air temperature, relative humidity, solar radiation, wind speed, and wind direction measurements taken every fifteen minutes at all four sites from 2002 to 2017.
  • 1) Timber survey data from 1911 in the Greenhorn Mountains, Sequoia National Forest
    This data publication contains tabular data with measurements of tree and shrub data for a set of transects located in the Greenhorn Mountains, Sequoia National Forest in California. The transects represent a systematic timber inventory collected across a large mixed-conifer and ponderosa pine dominated landscape by the U.S. Forest Service in 1911. Trees were tallied by species and diameter within 20 x 400 meter strips that spanned the center of quarter-quarter sections (QQs) delineated by the Public Land Survey System.
  • 2) Overstory and understory data from a contemporary reference stand: the Beaver Creek Pinery, Lassen National Forest, CA
    The Beaver Creek Pinery (BCP) is a ponderosa pine and black oak dominated stand in the Ishi Wilderness, Lassen National Forest, California. It has never been logged and due to its remoteness, has experienced more fire than many other such forests. Fires in 1990 and 1994 killed a substantial proportion of the ingrowth that is common in many other fire excluded stands, restoring a structure that is believed to be similar to what was found under historic fire regimes. This data publication contains measurements of tree, understory vegetation, and coarse woody debris variables taken in July of 1998 in the BCP, and may provide a useful reference for structural restoration of forests at similar elevations and of similar species composition.
  • 3) Tree and shrub measurements in Stanislaus National Forest and Yosemite National Park, collected in 1911 and 2005–2013
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.
  • 4) Kings River Experimental Watersheds stream discharge
    The Kings River Experimental Watersheds (KREW) project is a long term forest management study that began in the early 2000's. The KREW project is comprised of eight primary headwater catchments of the Kings River Basin within the Sierra National Forest, California. Continuous stream discharge measurements were collected to characterize the hydrologic functioning of the southern Sierra headwater basins, especially to infer how different watersheds with varying climate and vegetation behave in terms of water yield. The study also seeks to evaluate the impact of prescribed burning and mechanical tree thinning on water quantity and quality.
  • 5) Chaparral biomass measurements in the Cleveland National Forest
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. Data were collected to document differences in biomass accumulation in three nearby sites with varying burn histories in southern California chaparral.
  • 6) Fuel treatment and fire history within the Rim Fire in California
    This data publication contains a geospatial file in raster format of wildfires and fuels treatments that occurred between 1995 and 2013 on Stanislaus National Forest and Yosemite National Park in California within the area burned by the 2013 Rim Fire, excluding the outer 500 meters of the fire perimeter. These data were used to gain insight into the influence of fuels treatments, weather, vegetation, and water balance on fire severity in a large wildfire occurring in Sierra Nevada mixed-conifer forest at three different landscape scales, and to assess the impact of fuels treatments and previous fires on fire severity along the general direction of fire spread.
  • 7) Wind and slope effects on laboratory-scale fire behavior
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.
  • 8) Raw data for urban trees in California communities
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.
  • 9) Raw urban street tree inventory data for 49 California cities
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.
  • 1) Chaparral shrub bulk density and fire behavior
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.
  • 2) Physical and chemical properties of the foliage of 10 live wildland fuels
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.
  • 3) Data for National Fire and Fire Surrogate study: environmental effects of alternative fuel reduction treatments
    Comprised of 12 sites nationwide, the Fire and Fire Surrogates study (FFS) is a comprehensive interdisciplinary experiment designed to evaluate the economics and ecological consequences of alternative fuel reduction treatments in seasonally dry forests of the United States. The FFS deploys a common experimental design across the 12-site network, with each site consisting of a fully replicated experiment that compares four treatments: an un-manipulated control, prescribed fire, mechanical treatments, and mechanical + fire. Measurements include vegetation (trees, shrubs, grasses, forbs), fuels (forest floor, features of the living vegetation, and dead wood of various sizes), soil properties (chemical and physical properties of the forest floor and mineral soil), wildlife (birds, small mammals, herps), and bark beetles.
  • 4) Urban tree database
    This data publication contains urban tree growth data collected over a period of 14 years (1998-2012) in 17 cities from 13 states across the United States: Arizona, California, Colorado, Florida, Hawaii, Idaho, Indiana, Minnesota, New Mexico, New York, North Carolina, Oregon, and South Carolina. Measurements were taken on over 14,000 urban street and park trees. Key information collected for each tree species includes bole and crown size, location, and age. Based on these measurements, 365 sets of allometric equations were developed for tree species from around the U.S.
  • 1) Historical tree and shrub measurements on the Stanislaus National Forest: 1911 timber survey data
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.
  • 2) Marginal fire spread in live fuel beds - horizontal fuels
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.
  • 1) Forest structure and tree ring widths from the Fire and Fire Surrogate Study - Blodgett Forest Site
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.
  • 2) Southern pine defoliation growth response data
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.
  • 3) Wildland fire emission factors database
    Smoke emission factors (EFs) have been developed for a variety of wildland fuels beginning in the late 1960s. Many of these EFs have been presented in a variety of outlets and there is no centralized repository containing many of the EFs developed in the 1970s and 1980s. This data publication contains a compilation of emission factors for a variety of smoke components which have been presented in refereed as well as gray literature (literature that has not been published commercially or is not generally accessible) from the late 1960s through 2011.
  • 4) Fuel moisture extraction data measured to compare chainsaw and handsaw methods
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.
  • 5) Atlas of digital polygon fire extents for Idaho and western Montana
    This data publication provides plot-based measurements of: stem diameter for each stem > 0.4 centimeters on every sampled shrub, shrub status at time of sampling (live/dead/charred), and estimated shrub height obtained from 5 plots sampled in 2012-2013 on each of three sites (15 total plots) in the Cleveland National Forest. The sites are located near Kitchen Creek Road on southern Laguna Mountain in San Diego County, CA and were characterized by time since last burn -- 7 years, 28 years, or 68 years prior to the study.