An experimental study of the dispersion of the emissions from chimneys in reading—III: The investigation of dispersion calculations

Marsh, K.J.; Withers, V.R.

doi:10.1016/0004-6981(69)90087-0

Cited by 20 publications

(5 citation statements)

References 7 publications

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“…neutral or average conditions A ~ 200 stable conditions A ~ 600 (10.101) unstable conditions A ~ 50 Marsh and Withers (1969) find that the grid size Ax which yields the best correlation between observed concentration, C , and grid averaged emissions, Q^ is about 5 km.…”

Section: Line and Area Sourcesmentioning

confidence: 95%

Environmental Research Laboratories, 1978 annual report

1979

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The Chalk Point Dye Tracer Experiment, conducted during the night of 16-17 June 1977, provided accurate measurements of Na drift deposition at the ground due to emissions from the cooling tower. Meyer and Stanbro (1977a) measured Na deposition over a 30° arc on the ground at distances of .5 km and 1.0 km from the tower to be 1080 and 330 kg/km mo, respectively. Mass median drop diameters on the two arcs were 340 ym and 260 ym, respectively. The necessary cooling tower and atmospheric parameters that must be used in the application of a drift deposition model were also measured.

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Section: Line and Area Sourcesmentioning

confidence: 95%

Environmental Research Laboratories, 1978 annual report

1979

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“…A major source of this sulphur dioxide is Greater London to the south east, including the industrial estate and power station at Slough, Buckinghamshire. Reading, with a population of 139,000 and its own power station, has moderate levels of sulphur dioxide pollution which closely follow its suburban limits (Marsh and Foster, 1967). Didcot power station has too high a stack to have much effect on local lichens, while Oxford, with a population of 128,000 and no heavy industry or power station, is not heavily polluted and Parmelia species can be found on bark and wood within its suburbs.…”

Section: Introductionmentioning

confidence: 99%

A Lichen Flora of Berkshire, Buckinghamshire and Oxfordshire

Bowen

1980

The Lichenologist

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Native acid rock is extremely local in the region, but is still found in one field at Bradenham, Buckinghamshire, and in a few places near Ashdown Park and Lambourn in west Berkshire. Here, as in north Wiltshire, there are relict Eocene boulders known as 'sarsens', and these may harbour a rich cryptogamic flora corresponding to the Parmelion conspersae of James et al. (1977). Notable lichens found here include Aspilicia caesiocinerea,

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“…Although the ratio of the standard deviation (observed-estimated) to the observed mean (a'oe/pobs in Table 10.1) is not a true statistic, in that it cannot be related by, for example, a confidence level to a random distribution of uncorrelated pairs of values, it is a ratio commonly used to evaluate the success of models. Marsh and Withers (1969) indicate that, for their Reading, England, model as well as for others in the literature, the ratios 6oe/bobs are all higher than 1.1 for 6-and 24-hr averages during the heating season. From Table 10 because the former considers a band of acceptable error, whereas the latter is based on actual calculated and observed values (e.g., if Xobs = 0.03 ppm and Xest = 0.01 ppm, the skill score considers this pair a "success," whereas, for the purposes of calculating R2, this pair represents an error of 0.02 ppm).…”

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confidence: 99%