A Collection of the Public General Acts for the Regulation of Railways PDF Download

Author: Great Britain
Publisher:
ISBN:
Category : Railroad law
Languages : en
Pages : 332

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Author: England
Publisher:
ISBN:
Category :
Languages : en
Pages : 372

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Author: Great Britain. Parliament. House of Commons
Publisher:
ISBN:
Category :
Languages : en
Pages : 650

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Author: Cape of Good Hope (South Africa). Parliament. House. Select Committee on Crown Forests
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 190

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Author: Joe H. Scott
Publisher:
ISBN:
Category : Fire risk assessment
Languages : en
Pages : 68

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Fire managers are increasingly concerned about the threat of crown fires, yet only now are quantitative methods for assessing crown fire hazard being developed. Links among existing mathematical models of fire behavior are used to develop two indices of crown fire hazard-the Torching Index and Crowning Index. These indices can be used to ordinate different forest stands by their relative susceptibility to crown fire and to compare the effectiveness of crown fire mitigation treatments. The coupled model was used to simulate the wide range of fire behavior possible in a forest stand, from a low-intensity surface fire to a high-intensity active crown fire, for the purpose of comparing potential fire behavior. The hazard indices and behavior simulations incorporate the effects of surface fuel characteristics, dead and live fuel moistures (surface and crown), slope steepness, canopy base height, canopy bulk density, and wind reduction by the canopy. Example simulations are for western Montana Pinus ponderosa and Pinus contorta stands. Although some of the models presented here have had limited testing or restricted geographic applicability, the concepts will apply to models for other regions and new models with greater geographic applicability.

Author:
Publisher:
ISBN:
Category : Forest canopies
Languages : en
Pages : 92

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The Forest Inventory and Analysis (FIA) Program of the Forest Service, U.S. Department of Agriculture, conducts a national inventory of forests across the United States. A systematic subset of permanent inventory plots in 38 States is currently sampled every year for numerous forest health indicators. One of these indicators, crown-condition classification, is designed to estimate tree crown dimensions and assess the impact of crown stressors. The indicator features eight tree-level field measurements in addition to variables traditionally measured in conjunction with FIA inventories: vigor class, uncompacted live crown ratio, crown light exposure, crown position, crown density, crown dieback, foliage transparency, and crown diameter. Indicators of crown health derived from the crown data are intended for analyses at the State, regional, and national levels, and contribute to the core tabular output in standard FIA reports. Crown-condition measurements were originally implemented as part of the Forest Health Monitoring (FHM) Program in 1990. Except for crown diameter, these measurements were continued when the FIA Program assumed responsibility for FHM plot-based detection monitoring in 2000. This report describes in detail the data collection and analytical techniques recommended for crown-condition classification.

Author: New York (State). Legislature. Assembly
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 978

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Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 1144

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Author: Great Britain. Parliament. House of Lords
Publisher:
ISBN:
Category :
Languages : en
Pages : 174

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Author: Great Britain. Parliament. House of Commons
Publisher:
ISBN:
Category :
Languages : en
Pages : 470

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