Download or read book Impact of Mountain Pine Beetle Infestation and Salvage Harvesting on Seasonal Snow Melt and Runoff written by Sarah Boon and published by . This book was released on 2008 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study examines the impact of mountain pine beetle infestation on forest canopy structure on the Nechako Plateau, and the resulting impacts on snow accumulation and ablation under varied climatic conditions. Stand-scale results were used to drive a physically-based, distributed hydrological model of the Van Tine Creek watershed and assess watershed-scale hydrologic response to four harvesting/infestation scenarios."--Document.
Download or read book Hydrologic Effects of Mountain Pine Beetle Infestation and Salvage harvesting Operations written by John F. Rex and published by . This book was released on 2009 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project was developed to identify a set of risk indicators to predict the risk of summer-ground loss at the watershed level within the Vanderhoof Forest District (VFD) and others, subsequent to the mountain pine beetle (MPB) infestation of lodgepole pine stands. This report was done in relation to the VFD annual cut of stands, and the following difficultings that operators found in running their equipment in wet versus dry soils in harvest years. Risk indicators were selected from available GIS information, aerial photographs, and local knowledge. The most effective indicators for predicting the risk of wet-ground areas at the watershed level were found to be lodgepole pine content, understorey, drainage density, sensitive soils, and the topographic index, all of whose values are available from provincial databases. The work includes information on materials and methods, results and discussion, the authors' conclusions, as well as recommendations.--Includes text from document.
Download or read book A Synthesis of the Hydrological Consequences of Large scale Mountain Pine Beetle Disturbance written by Markus Schnorbus and published by . This book was released on 2011 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current synthesis is a review of research examining the effects of large-scale mountain pine beetle (MPB)-related disturbance conducted predominantly over the past five years. The emphasis is on research that explicitly examines the impact of beetle kill (or biotic disturbance in general) and the cumulative effects of large scale salvage harvesting operations in response to beetle kill. In general, forest disturbance has been found to increase snow accumulation and melt, reduce interception loss and evaporation, and increase runoff and stream flow.--Document.
Download or read book The effect of mountain pine beetle attack and salvage harvesting on streamflows written by and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The graph shows the large range of annual runoff in Baker Creek, from year to year, depending on snowfall. [...] The two plots of daily streamflow demonstrate the wide range of peak flows that can occur in Baker Creek from year to year depending on snowpack accumulation and melt rate. [...] The data points are the outputs of the model, before fitting to a line. [...] The upper line (red) is the expected discharge for the scenario being tested. [...] A summary table (Table 2), based on the frequency curves, summarizes the percent change in peak flow at each recurrence interval, the average peak flow change, the change in the timing of the peak event, and the seasonal water yield change for each scenario.
Download or read book Mountain Pine Beetle written by Fred L. Bunnell and published by . This book was released on 2011 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document provides a synthesis of recently completed studies to assess the ecological consequences of forest management after attack by mountain pine beetle or other large-scale disturbances. Studies are assessed for their contributions to gaps in knowledge previously identified in the Mountain Pine Beetle Initiative Working Paper "Evaluating effects of large scale salvage logging for mountain pine beetle on terrestrial and aquatic vertebrates," which was published in 2004. This report focuses on studies developed through the federal Mountain Pine Beetle Initiative, the federal Mountain Pine Beetle Program, and the complementary BC Forest Science Program. Relevant information from other jurisdictions is sometimes included to augment those studies. Topics examined are: the impacts of beetle kill and salvage operations on habitat attributes; the impacts of beetle kill and salvage operations on attendant processes, such as snag fall rates, light interception, and snow accumulation; and the wildlife response to large-scale beetle outbreaks and management strategies. For each of these three topics, we provide a summary of: research to date; pertinent findings to date; and gaps in research.
Download or read book Effects of Overstory Mortality on Snow Accumulation and Ablation written by Patrick Anthony Teti and published by . This book was released on 2008 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resource managers and forest hydrologists face serious questions about the effects of widespread canopy mortality and accelerated salvage logging on streamflow from mountain pine beetle (MPB)-affected watersheds. This project has documented physical stand characteristics, snow accumulation, and snow ablation rates of growing managed stands and deteriorating natural stands in six groups of plots in British Columbia. One of the main objectives of this project is to provide modelling partners with data on the snow hydrology and physical characteristics of many stands at different stages of growth and deterioration. This will improve their ability to calibrate models to new watersheds and will improve the accuracy of the results.--Includes text from document.
Download or read book The Impacts Mountain Pine Beetle on Forested Snowpacks written by Christopher Michael Welch and published by . This book was released on 2013 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The future of water resources in the west is tenuous, as climatic changes have resulted in earlier spring melts that have exacerbated summer droughts. Associated with climate changes to the physical environment are changes to the biological environment that may impact snow dynamics; namely via the massive outbreaks of Mountain Pine Beetle (MPB; Dendroctonus ponderosae) that have devastated several million hectares of Lodgepole Pine forests in the western U.S. and Canada. If snow accumulation and melt are determined by the physical environment of the snowpack, and forest canopies define in part this physical environment, how might recent insect outbreaks alter the timing and intensity of snowmelt? MPB often attack in large numbers, and within a few years, the canopy of an infected forest will turn from green but dying, to red, to grey. As needles fall, impacts on the snow pack include changes to wind driven transport, temperature gradients, and snow interception. Additionally, the shifting canopy alters the radiated physics of the canopy, specifically the shortwave/longwave flux density. Combined with a corresponding decrease of snow reflectance (albedo) from litter fall, the dying canopy will provide more energy available to the surface and likely drive snowpacks to melt more rapidly. Conversely, the diminished canopy cover will presumably decrease net longwave radiation of the snowpack. Canopy interception of snow is expected to decrease, and an increase in accumulation will result. I investigate the impacts of MPB disturbance on snow melt through modeling and micrometeorological measurements in intact lodgepole pine and mixed coniferous forests, a MPB-infested forest in the red stage, and a clearcut stand. Albedo at the homogenous intact stand is found to be 16 and 34% higher than the red stand during the melt periods of 2011 and 2012, but no significant difference is found between the red stand and the more heterogeneous 'healthy' stand. Modeled sensible heat over-predicts sensible heat by over 300% during the melt period of 2012. Results highlight the role of beetle-infested and mixed stands on altering snow albedo, and additionally suggest that model formulations for turbulent exchange between snow and atmosphere below forest canopies require improvement.
Download or read book Mountain Pine Beetle Dynamics in Lodgepole Pine Forests written by Walter E. Cole and published by . This book was released on 1980 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantifying the Water Resource Impacts of Mountain Pine Beetle and Associated Salvage Harvest Operations Across a Range of Watershed Scales written by Markus Schnorbus and published by Canadian Museum of Civilization/Musee Canadien Des Civilisations. This book was released on 2010 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents the results of a project done to assess the potential for impacts and changes to the peak-flow regime throughout various sub-basins of the Fraser River Watershed. The vast size and the physical complexity of the Fraser River Basin make it extremely difficult to directly measure the hydrologic effects of beetle kill and salvage harvesting. As a result, a hydrology model has been used to assess the hydrologic consequences of the current outbreak. The project is part of a larger effort in quantifying the water resource impacts of the pine beetle and salvage harvesting across a range of watershed scales.--Includes text from document.
Download or read book Review and Synthesis of Potential Hydrologic Impacts of Mountain Pine Beetle and Related Harvesting Activities in British Columbia written by J. F. Hélie and published by . This book was released on 2005 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Net Precipitation Within Small Group Infestations of the Mountain Pine Beetle written by and published by . This book was released on 1991 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Post mountain Pine Beetle Salvage Treatments on Fuel Loads and Fuel Moisture Dynamics in Colorado Lodgepole Pine Forest written by Paul Robert Hood and published by . This book was released on 2016 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout the Rocky Mountain region, recent infestations by the mountain pine beetle (Dendroctonus ponderosae; MPB) have caused widespread tree mortality and accumulation of dead, woody fuels. As forest management strategies are implemented to reduce the increase in surface fuel loads and salvage harvest of standing dead for use as lumber or biofuels, an understanding of the impacts of such actions is critical for making sound management decisions. To quantify how harvesting MPB-killed forest may affect fuel loads and fuel moisture content (FMC), we compared two types of salvage harvest - biomass removal and retention - and untreated lodgepole pine (Pinus contorta , LPP) forest, approximately 10 years post MPB epidemic, in the Colorado State Forest located in north-central Colorado. Fuel loads measurements were collected across three treatments in 10 experimental blocks. Each block compared biomass removal and biomass retention harvests with untreated MPB-killed forest. To determine whether surface woody fuels FMC differed between untreated MPB and harvested stands, three FMC stations were constructed at each of the 30 plots within the 10 block design. FMC stations consisted of recently harvested fuels in each fuel moisture time-lag class (1, 10, 100, 1000-hour). Each FMC station was measured weekly from late-May until mid-October and fuel moisture was calculated as the percentage of dry biomass. Additionally, 10 weather stations, five in treated and five in untreated forest, were deployed to detect differences in microclimate between treated and untreated stands. Biomass retention harvest resulted in a 30% increase in surface fuels overall with 3x greater coarse fuels (1000hr) and ~1.5x greater activity fuels (1 & 10hr) than biomass removal harvests. Both harvest methods resulted in 2x more activity fuels than untreated plots. Harvesting resulted in significantly lower FMC in 1-, 10-, 100- and 1000-hour fuels. 10-, 100- and 1000-hour fuels in treated plots dropped below the moisture of extinction (25% FMC) much earlier in the sampling period, and the 100- and 1000- hours fuels remained lower than the moisture of extinction for a greater amount of the sampling season. Litter/duff temperature and wind speed were found to be significantly greater in treated plots and precipitation was found to have the greatest effect on FMC in untreated plots. Managers should be cautioned that treated areas may exhibit increased fuels loads, lower FMC earlier in the year and contain less moisture throughout the fire season that may result in increased fire behavior and effects. If managers are seeking a treatment that is exclusively intended for ease of wildfire suppression, biomass removal should be the most successful in achieving their objectives.
Download or read book Mountain Pine Beetle and Salvage Harvesting Influence on Small Stream Riparian Zones written by John F. Rex and published by . This book was released on 2009 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reports on the investigation of the influence of the mountain pine beetle infestation and salvage harvesting on small stream and riparian zone ecological function, shade, and temperature. Small streams (less than a 2 m bankfull width) were selected because they are the most prominent stream type within a watershed and they determine many ecological characteristics of larger downstream channels.--Document.
Download or read book Mountain Pine Beetle written by United States. Congress. House. Committee on Natural Resources. Subcommittee on Water and Power and published by . This book was released on 2009 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Storing Beetle killed Logs Under Snow to Reduce Losses After Mountain Pine Beetle Attack written by Roger J. Whitehead and published by . This book was released on 2008 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: To assess the potential to store beetle-killed logs under insulated snowpacks in British Columbia to preserve wood quality and maximize value recovery, we reviewed the literature and visited operations in eastern Canada, where the technique has been recently adapted to routine operations, and in Finland, where 3.5 million m3 of timber are stored under snow annually. We also visited storage terminals in Sweden where very large volumes of sawtimber have been stored since 2005. We identified three roles that cold storage could play in responding to the current mountain pine beetle outbreak: (1) where the outbreak is expanding rapidly and green-attack volume exceeds capacity of mills to process all logs prior to dispersal flight, cold storage can prevent development and dispersal of beetles before milling late in the season; (2) where significant value is lost between harvesting and processing due to checking after delivery to the mill, cold storage can maintain moisture content and extend the time frame for achieving higher economic recovery; and, (3) where there is an opportunity to store large volumes of quality logs, doing so for an extended period (more than one year) may help defer or moderate anticipated social, environmental and economic impacts in the areas most affected by the mountain pine beetle outbreak. We report on discussions with woodland and plant managers in British Columbia on how the technique might be adapted to western Canadian operations and possible impediments to implementation, and we present recommendations.
Download or read book Integrated Pest Management Guide written by Douglas L. Parker and published by . This book was released on 1980 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mountain Pine Beetle Emergence from Infested Logs During Hauling written by and published by . This book was released on 1993 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
