Abstract
Lichen and moss tussocks or mats of uniform size were placed in the field and contaminated with a fallout simulant containing Cesium 134. A mass load of 5.0 g of particles per ft/sup 2/ of soil surface area, with a total activity of 3.5 microcuries /ft/sup 2/ was applied to 21 tussocks of each species. The fraction of the initial deposition intercepted by lichens as similar to that reported for grass species. Mosses, however, intercepted a much greater fraction; the contamination factor was 2-3 times greater for moss than for lichen. Moss tussocks had a greater area of foliage per unit of soil area due to the many individual plants and numerous small leaves which are effective trapping sites for particles. Following deposition of the simulant there was a rapid loss of particles for the first day. After the first day (there was a rain event) particle losses showed greater variation in loss rates throughout the experiment. Except for the first rainfall event, precipitation seemed to have little effect on particle retention. 12 references, 1 figure, 1 table.
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Claims 6
Claim · model-written summary
Lichens intercepted a fraction of deposition similar to grass.
Verbatim
e0“fraction of the initial deposition intercepted by lichens as similar to that reported for grass species”
Claim · model-written summary
Moss contamination factor was two to three times that of lichen.
Verbatim
e0“contamination factor was 2-3 times greater for moss than for lichen”
Claim · model-written summary
Moss tussocks had greater foliage area per soil area.
Verbatim
e0“Moss tussocks had a greater area of foliage per unit of soil area”
Claim · model-written summary
Particle loss was rapid on the first day after deposition.
Not reportedTaxon
Verbatim
e0“Following deposition of the simulant there was a rapid loss of particles for the first day”
Claim · model-written summary
Particle loss rates varied more after the first day.
Not reportedTaxon
Verbatim
e0“particle losses showed greater variation in loss rates throughout the experiment”
Claim · model-written summary
Except at the first rainfall, precipitation had little apparent effect on particle retention.
- Treatment
- precipitatione0
- Outcome
- particle retentione0
- Direction
- little effecte0
- Qualifier
- Except for the first rainfall evente0
Not reportedTaxon
Verbatim
e0“Except for the first rainfall event, precipitation seemed to have little effect on particle retention”