Columbia River spatial water chemistry

We mapped surface water chemistry along a ~600 km segment of the
Columbia River. We used a sensor-based and boat-mounted sensing
platform to continuously measure underway water chemistry.
Measurements were linked with global positioning systems (GPS) to
create maps of surface water chemistry. Data were collected over 6
days in July 2018 and include a single longitudinal survey of the
Columbia River. Data have been provided in three formats (raw,
hydraulic-corrected, and tau-corrected). Additionally, we archive
laboratory chemistry data from water samples collected during the
project. Sites include a range of main channel, backwaters, and
tributaries. Water chemistry samples were analyzed at the North
Temperate Lakes - Long Term Ecological Research facility and linked
with underway sensor measurements.