Development and Research:
Tracer Tests
CLICK PHOTOS FOR AN ENLARGED VERSION
|
![Multilevel well sampling array with over 10,000 subsurface sampling ports at the Cape Cod Site, MA. Several large-scale natural-gradient tracer tests and numerous small-scale tracer tests have been conducted with the array](photos/capecod/capecod_sm.jpg)
Multilevel well sampling array with over 10,000 subsurface sampling ports at the Cape Cod Site, MA. Several large-scale natural-gradient tracer tests and numerous small-scale tracer tests have been conducted with the array
|
![Tracer test being conducted to study subsurface contaminant transport at the Bemidji Site, MN](photos/bimidji/bimidji9_sm.jpg)
Tracer test being conducted to study subsurface contaminant transport at the Bemidji Site, MN
|
![USGS scientists processing water samples during a stream tracer test on California Gulch, Upper Animas River Watershed, CO](photos/aml/animas3_sm.jpg)
USGS scientists processing water samples during a stream tracer test on California Gulch, Upper Animas River Watershed, CO
|
![Locating inflows and springs discharging into Mineral Creek, CO, prior to conducting a tracer test. Tracer tests are used to assess the relative magnitude of metal loading from inflows along a stream reach](photos/aml/colorado_sm.jpg)
Locating inflows and springs discharging into Mineral Creek, CO, prior to conducting a tracer test. Tracer tests are used to assess the relative magnitude of metal loading from inflows along a stream reach
|
![A site of continuous water-quality sampling during a tracer test conducted on the North Fork of the Animas River, CO](photos/aml/animas4_sm.jpg)
A site of continuous water-quality sampling during a tracer test conducted on the North Fork of the Animas River, CO
|
![View of a data logger used to control a pump that injects a tracer solution into a stream during a stream tracer test](photos/aml/colorado4_sm.jpg)
View of a data logger used to control a pump that injects a tracer solution into a stream during a stream tracer test
|
![USGS equipment trailer -- bringing tracer tests to Rocky Mountain streams](photos/aml/aml7_sm.jpg)
USGS equipment trailer -- bringing tracer tests to Rocky Mountain streams
|
![Spacing sampling points along a stream prior to a tracer test on Mineral Creek, CO](photos/aml/animas6_sm.jpg)
Spacing sampling points along a stream prior to a tracer test on Mineral Creek, CO
|
![Filling a holding tank with a tracer solution prior to the start of a stream tracer study, Upper Animas River Watershed, CO](photos/aml/colorado3_sm.jpg)
Filling a holding tank with a tracer solution prior to the start of a stream tracer study, Upper Animas River Watershed, CO
|
![View of the setup of a NaCl tracer test that was designed to determine natural attenuation of metals in Pinal Creek, AZ](photos/pinal/pinal4_sm.jpg)
View of the setup of a NaCl tracer test that was designed to determine natural attenuation of metals in Pinal Creek, AZ
|
![Downstream view of Pinal Creek, AZ, where a tracer solution was injected into the stream during a tracer test. Water-quality sampling crews can be seen in the distance](photos/pinal/pinal6_sm.jpg)
Downstream view of Pinal Creek, AZ, where a tracer solution was injected into the stream during a tracer test. Water-quality sampling crews can be seen in the distance
|
|