TY - JOUR
T1 - SF6-3He tracer release experiment
T2 - A new method of determining longitudinal dispersion coefficients in large rivers
AU - Clark, Jordan F.
AU - Schlosser, Peter
AU - Stute, Martin
AU - Simpson, H. James
PY - 1996
Y1 - 1996
N2 - Longitudinal dispersion coefficients have been determined in the tidal Hudson River using sulfur hexafluoride. For this purpose, SF6, a nonreactive synthetic gas, was injected into the Hudson south of Albany, NY, and used in a fashion similar to a fluorescent dye. Three days after injection, SF6 distributions along the main axis of the river were approximately Gaussian. The change in variance with time showed two periods of linear growth. During the first period (days 3-8), the longitudinal dispersion coefficient was estimated to be 47 ± 6 m2 s-1, and during the second period (days 8-13), it was 162 ± 22 m2 s-1. A second gas, 3He, which was injected simultaneously with SF6, allowed for the determination of gas exchange rates across the air-water interface. Gas transfer velocities normalized to a Schmidt number of 600 ranged from 2.8 to 9.2 cm h-1 and correlated well with mean wind speed.
AB - Longitudinal dispersion coefficients have been determined in the tidal Hudson River using sulfur hexafluoride. For this purpose, SF6, a nonreactive synthetic gas, was injected into the Hudson south of Albany, NY, and used in a fashion similar to a fluorescent dye. Three days after injection, SF6 distributions along the main axis of the river were approximately Gaussian. The change in variance with time showed two periods of linear growth. During the first period (days 3-8), the longitudinal dispersion coefficient was estimated to be 47 ± 6 m2 s-1, and during the second period (days 8-13), it was 162 ± 22 m2 s-1. A second gas, 3He, which was injected simultaneously with SF6, allowed for the determination of gas exchange rates across the air-water interface. Gas transfer velocities normalized to a Schmidt number of 600 ranged from 2.8 to 9.2 cm h-1 and correlated well with mean wind speed.
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U2 - 10.1021/es9504606
DO - 10.1021/es9504606
M3 - Article
AN - SCOPUS:0029656875
SN - 0013-936X
VL - 30
SP - 1527
EP - 1532
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 5
ER -