Rhodamine WT dye concentration profiles measured at fixed stations in the Brandon Road Lock chamber near Rockdale, Illinois (October 20, 2015)
Dates
Publication Date
2016-08-01
Time Period
2015-10-20
Citation
Jackson, P.R., 2016, Rhodamine WT dye concentration profiles measured at fixed stations in the Brandon Road Lock chamber near Rockdale, Illinois (October 20, 2015): U.S. Geological Survey data release, http://dx.doi.org/10.5066/F77W69B7.
Summary
A Turner Designs C3 submersible fluorometer was deployed in the Brandon Road Lock chamber (BRLD) near Rockdale, Illinois, to measure Rhodamine WT dye concentrations during a U.S. Geological Survey dye study conducted on October 20, 2015. The lock chamber at BRLD was dyed with 4 liters of Rhodamine WT dye during a routine filling procedure. Measurements of dye concentration profiles were collected at 15 stations in the lock chamber and capture the three-dimensional distribution of the dye in the chamber after filling, after the lock was emptied, and after a 17-minute flushing operation of the lock. A series of five taglines and rope and pulley systems were used to position the fluorometer at each station to avoid putting a boat in the [...]
Summary
A Turner Designs C3 submersible fluorometer was deployed in the Brandon Road Lock chamber (BRLD) near Rockdale, Illinois, to measure Rhodamine WT dye concentrations during a U.S. Geological Survey dye study conducted on October 20, 2015. The lock chamber at BRLD was dyed with 4 liters of Rhodamine WT dye during a routine filling procedure. Measurements of dye concentration profiles were collected at 15 stations in the lock chamber and capture the three-dimensional distribution of the dye in the chamber after filling, after the lock was emptied, and after a 17-minute flushing operation of the lock. A series of five taglines and rope and pulley systems were used to position the fluorometer at each station to avoid putting a boat in the lock chamber and creating additional mixing. Fluorometer readings were taken at a frequency of 1 measurement every second.
These data were collected during dye tracing surveys of the Des Plaines River downstream of Brandon Road Lock and Dam (BRLD) near Rockdale, Illinois. The purpose of this dye study was to assess the mixing, advection, and dispersion of dye within the BRLD lock chamber and in the approach channel downstream. These data will aid in the design of potential strategies for preventing upstream transport of invasive Asian carp through the BRLD. Dye was injected into the intakes for the lock chamber at the start of the filling process. The dye was injected through grates atop the intake channels on both sides of the lock. Injection began at 1024 hours on October 20, 2015, and ended at 1030 hours on October 20, 2015. A total of 4 liters of Rhodamine WT in a 20 percent solution was injected (2 liters on each side of the lock). The target dye concentration in the lock chamber was 9 parts per billion (ppb). Key operation changes occurred at the following times: 10/20/2015 10:22 (start filling the lock chamber); 10/20/2015 10:43 (end filling the chamber); 10/20/2015 12:26 (start emptying lock chamber); 10/20/2015 12:43 (lock chamber empty, downstream gates remain closed); 10/20/2015 14:00 (downstream valves opened to drain leakage into lock chamber); 10/20/2015 14:08 (downstream gates opened); 10/20/2015 14:15 (lock chamber flushing procedure started; 1/4 opening of upstream valves); 10/20/2015 14:32 (flushing procedure ended); 10/20/2015 15:32 (begin filling lock chamber); 10/20/2015 15:49 (begin emptying of partially filled lock chamber); 10/20/2015 16:00 (Lock reopened to normal navigational traffic). All times are in Central Daylight Time.
