Relationships of Physiography and Microclimate to Fallout Deposition
1968
Whicker, F Ward | Loveless, Charles M.
Measurements of fallout concentrations in various media were made on four physiographically contrasting sites within a 2—ha mountainous area. Air concentrations of radioactivity were lowest on the north and west slopes as a possible result of air filtration by foliage and lower dust concentrations. Fallout deposition on vertical gummed surfaces was highest at the south and west sites in apparent relation to higher mean wind velocities. Fallout deposition via rainfall was related to amounts of precipitation, but the monthly variations in both measurements were much higher than site variations. Fallout accumulation in soil was lowest on the timbered north slope. Significant differences in plant concentrations of radioactivity were found among species and sampling dates, but no differences were apparent among the four sites.
显示更多 [+] 显示较少 [-]