Catalog

Year

Displaying 1 - 10 of 30

This report outlines the development (section 2) and testing (section 3) of a simple mathematical dispersion model, — based on Gaussin plume models for air polution, — for predicting smoke concentration and visibility reduction downwind from prescribed...

Person: Ros, Knight, Packham, Vines
Year: 1980
Type: Document
Source: TTRS

We have used the high optical absorptivity of urban and source particulates to trace their ‘graphitic” component. The optical absorptivity and the particu late carbon loading show a strong correlation. Analyses of the data indicate that primary soot...

Person: Rosen, Hansen, Dod, Novakov
Year: 1980
Type: Document
Source: TTRS

A field investigation was initiated in the summer 1978 to quantify the influence of meteorological factors, ignition method, and fuel conditions on the behaviour of smoke plumes from open field burning. Measurements of air quality and meteorological...

Person: Craig, Wolf
Year: 1980
Type: Document
Source: TTRS

Man began an intensive program to keep fire out of the woods about 70 years ago. Periodic ground fires once common in western pine forests were reduced, and a stand type that had been open, thrifty, and fairly resistant to wildfires lost those...

Person: Martin, Mitchell, Martin
Year: 1980
Type: Document
Source: TTRS

Flexible polyurethane foams that are char formers are capable of smoldering combustion. The smoldering process is an oxygen-limited, heterogenous oxidation process that slowly transforms the foam to a brittle, black replica of itself; for the foam...

Person: Rogers, Ohlemiller
Year: 1980
Type: Document
Source: TTRS

In Australia the long-term ecolgical consequences of forest practices which lead to nutrient depletion may be very serious. In the absence of fertilization, cumulative nutrient depletion associated with intensive management (involving clear-felling,...

Person: Raison
Year: 1980
Type: Document
Source: TTRS

Generalizations of the 'opacity method' of analyzing visible smoke-plume diffusion are presented. The horizontal dispersion length, sigma-y, is derived from the outline of a plume having an arbitrary vertical concentration distribution. The...

Person: Gifford
Year: 1980
Type: Document
Source: TTRS

The mass burning rates of several polymer systems, including polycarbonates, polysystrenes, polyethylenes, and wood were determined for steady-state combustion in an apparatus similar to that constructed at Factory Mutual Research. The work was...

Person: Petrella
Year: 1980
Type: Document
Source: TTRS

A note on the features and control of the ground (soil fires that occur at intervals of 5-8 yr in the Soviet Far East. The winter ground fires occur when the snow cover is incomplete, after a warm dry autumn and when the water table is low. These fires...

Person: Filippov
Year: 1980
Type: Document
Source: TTRS

Emissions from prescribed fire vary geographically. In the Northeast, for example, prescribed fires are rare. In other sections, e.g., the southern Coastal Plain, meteorological conditions, terrain, and light fuel loads minimize atmospheric...

Person:
Year: 1980
Type: Document
Source: TTRS