This resource contains high-frequency EXOS water quality sensor data collected at the outlet of the Talladega study watershed, including conductivity, dissolved oxygen, turbidity, fluorescent dissolved organic matter concentrations, and temperature. This study was conducted in the Talladega research watershed (outlet location: 33.76219799, -85.59550775) in the Talladega National Forest (Cleburne County, AL, USA). The watershed drains a non-perennial unnamed tributary of Pendergrass Creek, and contains 0.92 km^2 of mixed coniferous and deciduous forest in the Piedmont Upland physiographic section. Located near Anniston, AL, the watershed spans an elevation range from 345 to 456 m above sea level and is a tributary to the Coosa River (within the larger Mobile-Tombigbee basin). The region has a humid subtropical climate, with mean daily January and July air temperatures of 5.3°C and 25.3°C respectively, and mean annual precipitation of 1,400 mm/yr.

These data were collected in support of the core sampling goals of the Aquatic Intermittency effects on Microbiomes in Streams (AIMS) Project. Between 15 September 2021 and 31 December 2024, we monitored surface water quality and physicochemistry at the outlet (TLM01) of the AIMS Talladega watershed at 15 minute intervals using a multi-parameter sonde (YSI EXO2).

Included in this excel file are four tabs: 1. Metadata: methods, authorship and site information; 2. Data Types: column descriptions for each data file in this resource; 3. Site_info; site name, latitude and longitude for the site at which the sensor was deployed; 4. QAQC'ed EXO data

Sensors were maintained every three weeks according to this SOP: Flynn, S., S. Godsey, R. Hale, R. Lanfear, E. Seybold, S. Speir, M. Wolford (2025). Sensor Maintenance SOP, HydroShare, http://www.hydroshare.org/resource/f056a431a6794d2dbf9f6206c00ac560

Sensors were calibrated quarterly according to this SOP: Flynn, S., R. Lanfear, E. Seybold (2025). Sensor Calibration SOP, HydroShare, http://www.hydroshare.org/resource/85fa713daf0142a4b45e3bc8ff1d1e30

FDOM was corrected for Turbidity and Temperature according to the methods from Downing et al 2012.

For information about installing sensors, please see https://www.hydroshare.org/resource/703cf05242f7455c8dfb072dd072c962/

For further information on pressure transducer data related to this resource, please see: Peterson, D., N. Jones (2025). Talladega Pressure Transducer Data (AIMS_SE_TAL_approach1_PRES), HydroShare, http://www.hydroshare.org/resource/93e2861410e647d9a710eea036832dbe

For further information on continuous discharge measurements at the watershed outlet/related to this resource, please see: Plont, S., M. Wolford, K. Zarek, D. Peterson, N. Jones, S. Speir (2025). AIMS Talladega Continuous Discharge at Watershed Outlet Data (AIMS_SE_TAL_DISC), HydroShare, http://www.hydroshare.org/resource/fc7ae2d28e3c481d805902a79af90a95

For further information on field discharge measurements related to this resource, please see: Plont, S., D. Peterson, M. Wolford, N. Jones, S. Speir (2025). AIMS Talladega Field Discharge Data (AIMS_SE_TAL_DISL), HydroShare, http://www.hydroshare.org/resource/0e7ad0451bdc45d2b0a51bb538a10909