Description
Excerpt from Ignition Probabilities of Wildland Fuels Based on Simulated Lightning Discharges
Fine fuel samples from Northwestern forest areas were subjected to an electric arc discharge that simulated the lightning continuing current. The important fuel state para meters and the ignition probabilities were determined using logistic regression.
The ignition probabilities for duff from short-needled coni fer species were found to depend almost entirely on the depth of the fuel bed. In the case of litter and duff from long needled species, ignition probabilities depend mostly on the ovendry fuel moisture.
Ignition probabilities also depend on the duration of the are only, with current flow and diameter having no detectable effect. Because the continuing current durations can be fit well by a Weibull distribution for both positive and negative discharges to ground, the probabilities conditional on the current duration can be converted to marginal probabilities per discharge. The necessary integrations were done and the results are presented.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Fine fuel samples from Northwestern forest areas were subjected to an electric arc discharge that simulated the lightning continuing current. The important fuel state para meters and the ignition probabilities were determined using logistic regression.
The ignition probabilities for duff from short-needled coni fer species were found to depend almost entirely on the depth of the fuel bed. In the case of litter and duff from long needled species, ignition probabilities depend mostly on the ovendry fuel moisture.
Ignition probabilities also depend on the duration of the are only, with current flow and diameter having no detectable effect. Because the continuing current durations can be fit well by a Weibull distribution for both positive and negative discharges to ground, the probabilities conditional on the current duration can be converted to marginal probabilities per discharge. The necessary integrations were done and the results are presented.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Details
Publisher - Forgotten Books
Author(s) - Don J. Latham
Hardback
Published Date -
ISBN - 9780365541516
Dimensions - 22.9 x 15.2 x 0.5 cm
Page Count - 24
Paperback
Published Date -
ISBN - 9780365541486
Dimensions -
Page Count -
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.