. Boston Logan International Airport environmental impact study. Logan International Airport; Airports; Environmental impact statements; Harbors; Oceanography; Pollution; Pollution; Transportation. 692 Palmer and Izatt TABLE 3. The 5-Hour Mean Standard Deviation* (in cm) 30,000 Location South West North - East Meter 022 Sept. X 10' 6 62 X 10« 3 92 X 10' 6 13 X 10« Oct. X 10« X 10* X 10« X 10* Meter 023 Sept. 1 94 X 10* 8 34 X 10' X 10' X 10' Oct. 7 60 X 10« 116 X 10' X 10« 9 23 X 10« A summary of the results for the short-term 5-hour mean variances (particle
. Boston Logan International Airport environmental impact study. Logan International Airport; Airports; Environmental impact statements; Harbors; Oceanography; Pollution; Pollution; Transportation. 692 Palmer and Izatt TABLE 3. The 5-Hour Mean Standard Deviation* (in cm) 30,000 Location South West North - East Meter 022 Sept. X 10' 6 62 X 10« 3 92 X 10' 6 13 X 10« Oct. X 10« X 10* X 10« X 10* Meter 023 Sept. 1 94 X 10* 8 34 X 10' X 10' X 10' Oct. 7 60 X 10« 116 X 10' X 10« 9 23 X 10« A summary of the results for the short-term 5-hour mean variances (particle spread) for different locations and times are presented in Table 3. Lagrangian Verification The method of determining hourly dispersion characteristics from current meters was applied to a study at the outlet of the Grand River, Port Maitland, on the northeast shore of Lake Erie in September 1969. A recording current meter was installed X 103 meters southwest of the river outlet at the mid-depth in 11 meters of water, where it was operated from September 2 to September 18. The dispersion characteristics determined from this current meter record are presented in Table 4. A short-term dye injection run was conducted on September 8. Rhodamine B dye was in- jected continuously at a constant rate (con- tinuous constant rate point source) at the mid-channel point 2 meters below the surface in the river outlet for approximately 8 hours. The dye plume came from a northwesterly direction (went to the southeast). Once equilib- rium conditions (steady state) were achieved 1000 meters from the source, concentration pro- files were measured in two dimensions (parallel to the water surface and at various depths) at five selected cross sections. Details of the method are outlined in Foxworthy et al. [1966] and Palmer [1969]. Mass-flow balances were com- TABLE 4. Port Maitland 5-Hour Dispersion Characteristics, September 1969 Direction cm U, cm/sec North X 10« East
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