Solute chemistry data across five wetland complexes in the Augusta Creek Catchment, MI. Additional data also includes hydrologic data from the USGS monitoring station on Augusta Creek (station 04105700) and meteorological data from the Kellogg Biological Station Long-term Ecological Research Program (KBS LTER), located just outside the Augusta Creek Catchment. For each of the five wetland complexes, we also include site characteristics, including spatial data (coordinates, drainage area, surface area, vegetated area, and open water area) and hydrologic data (measured discharge at the wetland inlets and outlets, and hydraulic loading rate).

Methods: The solute chemistry data was collected every 2-3 weeks from October 2021 to June 2024, and includes dissolved organic carbon (DOC), nitrate (NO3-), sulfate (SO42-), chloride (Cl-) and magnesium (Mg2+). Within 24 hours of collection samples were filtered through 0.45µm cellulose acetate membrane filters. We measured DOC (as non-purgeable organic carbon - NPOC), using two total organic carbon analyzers with total nitrogen units (Shimadzu TOC-V CPH with a TNM-1 and autosampler ASI-V before March 9 2023 and Shimadzu TOC-L CPH/CPN with a TNM-L ROHS and autosampler ASI-L after March 9 2023). For our analysis, we only include DOC/NPOC data after March 9 2023, due to discrepancies between the two instruments used. We measured anions (Cl-, NO3- [as NO3--N], SO42-) using an ion chromatography system (Thermo Fisher Dionex, ICS1100 and ICS1000 and AS-DV autosampler). Our method detection limits were: 0.02 mg L-1 for anions and 0.43 mg L-1 for NPOC. For values below method or instrument detection limit, we assigned concentrations of half the limit of quantification for the purpose of calculations and analyses. If this data is used in the future, values below the method detection limit will need to be filtered appropriately. Values that are NA have no available data. For the wetland inlet and outlet discharge data, we collected discharge data for most, but not all of the inlet/outlet sites, during a period of baseflow from August 13-14, 2024 using two Sontek Flowtracker2 Acoustic Doppler Velocimeters. Discharge values were calculated using the Flowtracker’s mid-section method, measuring depth and velocity at ~20 stations across the stream width. All spatial data was calculated using ArcGIS Pro Software.