This readme.txt file was generated on 2022–09-14 by David Baldus. Recommended citation for the data: Baldus, David, B; Gran, Karen, B. (2022). Sargent Creek Nutrient Injection Breakthrough Curve. Retrieved from the Data Repository for the University of Minnesota. https://doi.org/10.13020/q5jh-n325. ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Sargent Creek Nutrient Injection Breakthrough Curve 2. Author Information Principal Investigator Contact Information Name: David B. Baldus Institution: University of Minnesota Duluth Email: baldu024@d.umn.edu Associate or Co-investigator Contact Information Name: Karen B. Gran Institution: University of Minnesota Duluth Email: kgran@d.umn.edu 3. Date published or finalized for release: 2022 4. Date of data collection: Sargent Control Reach: 2021-09-15 Sargent Treatment Reach: 2021-09-22 5. Geographic location of data collection: Sargent Creek Restoration Project off of Beck’s Road and the William Munger Trail Sargent Control Reach(Lat/Long DD): Top of Reach: 46.6854119, -92.2715342 Bottom of Reach: 46.6847893, -92.2702558 Sargent Treatment Reach(Lat/Long DD): Top of Reach: 46.6792062, -92.2651767 Bottom of Reach: 46.6782767, -92.2642550 6. Information about funding sources that supported the collection of the data: The analysis of this data was made possible by a Short Term Action Request Grant from the Minnesota Department of Natural Resources Lake Superior Coastal Zone Program. Funding for the collection of these data was provided by the Minnesota Environment and Natural Resources Trust Fund as recommended by the Legislative-Citizen Commission on Minnesota Resources (LCCMR) 7. Overview of the data: These data are the result of a nutrient tracer test run on two reaches of Sargent Creek. One of the reaches was restored in 2019, this is the treatment reach, the other was not restored, this is the control reach. These tracer tests were conducted as part of an effort to assess the effects that restoration practices have on a stream ecosystems. -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: These data are available with a Attribution 3.0 United States license (http://creativecommons.org/licenses/by/3.0/us/) 2. Links to publications that cite or use the data: Not applicable 3. Terms of Use: Data Repository for the U of Minnesota (DRUM) By using these files, users agree to the Terms of Use. https://conservancy.umn.edu/pages/drum/policies/#terms-of-use --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: Sargent_BTC Short description: Breakthrough curve data from nutrient injection tracer tests conducted at Sargent Creek on 2021-09-15 and 2021-09-22 -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: A solution of nutrients (Potassium Nitrate (KNO3), Ammonium dihydrogen phosphate ((NH4)H2PO4)) and a conservative tracer (Sodium Chloride (NaCl)) dissolved in stream water was injected into the stream at the top of the reach as an instantaneous release. Water samples were collected in the thalweg at downstream end of the reach to describe reach-scale nutrient spiraling. Additionally water samples were collected at two sites located mid-reach at the upstream and downstream end of a representative riffle type habitat unit to describe the nutrient cycling within these individual habitat units. Timing of sampling was determined by a conductivity meter in order to capture rising, peak, and falling concentrations and generate a breakthrough curve (BTC). Grab samples were collected by hand at a uniform depth (0.6 of total water depth) in clean 250ml bottles. Samples were placed on ice in the field and returned to the lab the same day of experiment to be filtered through 0.4 mm Isopore membrane filters. Nutrient samples were then frozen until analysis while Chloride samples were chilled until analysis. All analyses were conducted by the Central Analytical Laboratory at the Natural Resources Research Institute. Water samples were analyzed for concentrations of Nitrate, Ammonia, Ortho-Phosphate and Chloride according to standard colorimetric methods. Nitrate, Ammonia and Chloride were measured using the Lachat FIA system (Flow Injection Analysis). Ortho-P was measured using the manual method. Low Level [NH4]–N by FIA (Salicylate method, SM 4500-NH3 G 2011) [Nitrate + Nitrite]–N by Autoanalyzer (SM 4500 NO3- F-11) Ortho-Phosphate (o-P) Manual Ascorbic Acid method (SM 4500-P E 2011); also referred to as Soluble Reactive Phosphorus (SRP) Chloride (SM 4500 Cl- E-2011) 2. Methods for processing the data: These are the raw data. 3. Standards and calibration information: See standard methods above. 4. Environmental/experimental conditions: 2021 was a low flow year in Minnesota. This is reflected in the Discharge values reported in the data. Ambient Conditions on 2021-09-15 for Sargent Control Reach: pH:8.5 DO%:95.1 SpC(µS/cm):244.9 Temp.(C):14 Turbidity(NTU):13.6 Discharge(㎥/s):0.0056 Ambient Conditions 2021-09-22 for Sargent Treatment Reach: pH:8.5 DO%:95.1 SpC(µS/cm):244.9 Temp.(C):14 Turbidity(NTU):13.6 Discharge(㎥/s):0.0053 5. People involved with sample collection, processing, analysis and/or submission: All analyses were conducted by the Central Analytical Laboratory at the Natural Resources Research Institute. Sample collection and prep for analyses was conducted with help from Annika Erickson. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Sargent_BTC.csv] ----------------------------------------- 1. Number of variables: 14 2. Number of cases/rows: 85 3. Missing data codes: Code/symbol: NA Definition: Not Available 4. Variable List A. Name: Site Description: Grab sample site location (Creek, Reach Type, Location within reach) Bottom grab sites are at the end of the reach. B. Name: Sample ID Description: Grab Sample Name in order of collection. AMB refers to ambient condition sample collected before pulse reached sample site. C. Name: Date Description: Date Sample was collected in M/DD/YYYY format. D. Name: Dist Description: Longitudinal Distance from injection site to sampling site measured along the thalweg in Meters using a total station. E. Name: Q Description: Discharge of stream on day of sampling in cubic meters per second. F. Name: W Description: Average wetted width of stream on day of sampling in meters. G. Name: Time Sampled Description: Time of day sample was collected in CST. Sargent Control Middle is missing Time Sampled because the field technician failed to sync their stopwatch with a temporal datum. H. Name: Clock Time Description: Time elapsed since injection until sample was gathered in HH:MM:SS. Clock Time for Sargent Control Middle is not pinned to injection time (00:00:00 is an unknown time of day). I. Name: INJ Time Description: Time of day (CST) that solutes were injected into the stream. J. Name: SpC Description: Specific Conductivity (µS/cm) measured in stream at time of sampling. K. Name: OP Description: Concentration of Orthophosphate in sample in parts per billion. L. Name: NH4-N Description: Concentration of Ammonium in sample in parts per billion. M. Name: NO2/NO3-N Description: Concentration of Nitrate/Nitrite in sample in parts per billion. N. Name: Cl Description: Concentration of Chloride in sample in milligrams per liter. O. Name: INJ Description: Ratio of nutrients(KNO3 and(NH4)H2PO4) to chloride in injectate