Geospatial Assessment of Karst Spring Water Quality in Northeast Tennessee, USA
Abstract
:1. Introduction
2. Materials and Methods
2.1. Field Data Collection
2.2. Laboratory Analysis
2.3. Statistical and Geostatistical Analysis
3. Results
3.1. Descriptive Statistics
3.2. Spatial Autocorrelation
3.3. Kriging and Cokriging of E. coli
3.4. Kriging and Cokriging of Radon
4. Discussion
4.1. Physicochemical Parameters
4.2. Microbial Constituents
4.3. Radioactive Constituent
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Water Quality Parameters | Laboratory/Instrument Method |
---|---|
Temperature (°C) Dissolved oxygen (mg/L) pH Turbidity (NTU) Conductivity (µs/cm) Specific conductance (µs/cm) Total dissolved solids [TDS] (mg/L) Oxidation reduction potential [ORP] (mV) | YSI ProDSS-2 626870-2 multiparameter water quality meter (with GPS) |
Nitrite (mg/L) Nitrate (mg/L) | Method 300_M |
Fecal coliform (CFU/100 mL) E. coli (CFU/100 mL) | Standard Methods 9223 B (Enzyme Substrate) |
Radon (pCi/L) | Method 7500-RN(B) |
Parameter | Min | Max | Median | 25th Percentile | 75th Percentile | EPA and TDEC * Standards |
---|---|---|---|---|---|---|
Temp (°C) | 11.5 | 20.0 | 14.25 | 13.50 | 14.83 | <30.5 * |
DO (mg/L) | 0.42 | 8.93 | 6.44 | 5.51 | 7.51 | >5 |
pH | 6.66 | 8.50 | 7.38 | 7.29 | 7.60 | 6.6–8.5 |
Turbidity (NTU) | 0.30 | 35.0 | 1.44 | 0.74 | 3.018 | 1–5 |
Conductivity (µs/cm) | 57.7 | 483.0 | 345.15 | 189.05 | 377.98 | <800 |
Specific cond. (µs/cm) | 77.7 | 608.0 | 429.55 | 242.23 | 473.60 | |
TDS (mg/L) | 51 | 396 | 279 | 157.50 | 308.00 | <500 |
ORP (mV) | −50.8 | 652.7 | 106.65 | 77.03 | 129.78 | <250 |
Nitrite (mg/L) | 0.009 | 0.116 | 0.018 | 0.0091 | 0.018 | <1 |
Nitrate (mg/L) | 0.011 | 3.77 | 1.17 | 0.49 | 2.04 | <10 |
Fecal coliform (CFU/100 mL) | 1.0 | 1011.2 | 209.8 | 114.05 | 784.30 | |
E. coli (CFU/100 mL) | <1 | 629.4 | 5.75 | 1.00 | 26.08 | <1 |
Radon (pCi/L) | 0.0 | 1100.0 | 356.5 | 193.00 | 577.50 | <300 |
Kriging | Cokriging | |
---|---|---|
Root mean square standardized | 0.194 | 0.161 |
Mean standardized | 0.023 | 0.0018 |
Average standard error | 787.1 | 773.7 |
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Fashina, L.; Luffman, I.; Joyner, T.A.; Nandi, A. Geospatial Assessment of Karst Spring Water Quality in Northeast Tennessee, USA. Geosciences 2022, 12, 303. https://doi.org/10.3390/geosciences12080303
Fashina L, Luffman I, Joyner TA, Nandi A. Geospatial Assessment of Karst Spring Water Quality in Northeast Tennessee, USA. Geosciences. 2022; 12(8):303. https://doi.org/10.3390/geosciences12080303
Chicago/Turabian StyleFashina, Lukman, Ingrid Luffman, T. Andrew Joyner, and Arpita Nandi. 2022. "Geospatial Assessment of Karst Spring Water Quality in Northeast Tennessee, USA" Geosciences 12, no. 8: 303. https://doi.org/10.3390/geosciences12080303