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Book Dispersion of Air Tracers Into and Within a Forested Area 2

Download or read book Dispersion of Air Tracers Into and Within a Forested Area 2 written by and published by . This book was released on 1970 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dispersion of fluorescent powders, dyes and spores from a clearcut area into and within a 45-year old Douglas-fir forest was studied under various meteorological conditions. A total of 111 rotorods samplers were used to trap the tracers within a canopy volume of 20 m height, 210 m width and 270 m length. Wind speed, direction and air temperature were monitored on five towers on a line perpendicular to the forest wall. Twenty-four multiple location releases were made during 1968 and 1969. Part 1 describes the experimental site, procedures and methods, Part II contains data collected and Part III results, discussion and conclusions. (Author).

Book Dispersion of Air Tracers Into and Within a Forested Area

Download or read book Dispersion of Air Tracers Into and Within a Forested Area written by and published by . This book was released on 1969 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Dispersion of Air Tracers Into and Within a Forested Area 2

Download or read book Dispersion of Air Tracers Into and Within a Forested Area 2 written by Leo J. Fritschen and published by . This book was released on 1969 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dispersion of fluorescent powders, dyes and spores from a clearcut area into and within a 45-year old Douglas-fir forest was studied under various meteorological conditions. A total of 111 rotorods samplers were used to trap the tracers within a canopy volume of 20 m height, 210 m width and 270 m length. Wind speed, direction and air temperature were monitored on five towers on a line perpendicular to the forest wall. Twenty-four multiple location releases were made during 1968 and 1969. Part 1 describes the experimental site, procedures and methods, Part 11 contains data collected and Part 111 results, discussion and conclusions. (Author).

Book Air Pollution Abstracts

Download or read book Air Pollution Abstracts written by and published by . This book was released on 1975 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Wastewater Aerosols and Disease

Download or read book Wastewater Aerosols and Disease written by H. Pahren and published by . This book was released on 1981 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Technical Bulletin

Download or read book Technical Bulletin written by and published by . This book was released on 1980 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Modeling Southern Pine Beetle Populations Symposium Proceedings

Download or read book Modeling Southern Pine Beetle Populations Symposium Proceedings written by Fred M. Stephen and published by . This book was released on 1980 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Estimating Production Rates and Operating Costs of Timber Harvesting Equipment in the Northern Rockies

Download or read book Estimating Production Rates and Operating Costs of Timber Harvesting Equipment in the Northern Rockies written by Charles W. George and published by . This book was released on 1981 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Bull Run Blowdown

Download or read book Bull Run Blowdown written by and published by . This book was released on 1987 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book General Technical Report INT

Download or read book General Technical Report INT written by and published by . This book was released on 1981 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Steady state Two dimensional Air Flow in Forests and the Disturbance of Surface Layer Flow by a Forest Wall

Download or read book Steady state Two dimensional Air Flow in Forests and the Disturbance of Surface Layer Flow by a Forest Wall written by Joseph H. Shinn and published by . This book was released on 1971 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: New semi-empirical models are obtained of the mean momentum transport processes in and above forests for two contrasting micrometeorological problems: (1) the equilibrium air flow in forests far upwind of any inhomogeneity in the fetch, and (2) the nonequilibrium air flow in the transition region of the surface layer flow disturbed by the entrance into a forest. The study is confined to neutral stability conditions. Experimental data are from studies in eight forests and a wind tunnel simulation. The equilibrium mean velocity profiles in forest canopies are shown to be two-dimensional. A lateral component of flow increases downward from the top of the canopy. A semi-empirical model of mean velocity components is derived and verified for the upper 90% of the forest canopy depth. In the nonequilibrium flow in the transition region downwind of a forest wall: (a) The logarithmic velocity profile is found to be an empirical approximation for the lower part of the boundary layer, assuming that only the friction velocity varies with downstream distance. An empirical relation for the horizontal variation of the friction velocity is obtained. (b) The mean velocity profiles in a mixing zone located at midcanopy level are shown to have a low-level velocity maximum and horizontal similarity. (Author).

Book Research Note PSW

Download or read book Research Note PSW written by and published by . This book was released on 1978 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: