Chemical and Geological Control on Surface Water within the Shade River Watershed in Southeastern Ohio

• Published in: Journal of environmental protection (Irvine, Calif.) Calif.), 2013, Vol.4 (1), p.1-11
• Main Authors: Gbolo, Prosper, López, Dina L.
• Format: Article
• Language: English
• Subjects: Alkalinity
• ISSN: 2152-2197; 2152-2219
• DOI: 10.4236/jep.2013.41001

The under-sampled middle and western branches of Shade River Watershed (SRW) in SE Ohio were investigated as part of the Ohio University-U.S. Environmental Protection Agency (EPA) STAR grant. This project was for monitor-ing the quality of watersheds in Ohio and classifying them according to their physical, chemical, and biological condi-tions. Water samples, as well as field parameters, were taken at twenty-two sites for chemical analyses. The ions ana-lyzed included Ca, Mg, Na, Fe, Mn, Al, NO3, SO4, HCO3, and total PO4, while the field parameters measured included pH, dissolved oxygen (DO), total dissolved solids (TDS), electrical conductivity (EC), and alkalinity. To assess the wa-ter quality within the SRW, the analyzed ions and field parameters were compared to the USEPA criteria for the survival of aquatic life. Analytical results showed that the watershed is dominated by Ca-HCO3 waters with DO, Fe, Mn, and PO4 being the main causes of impairment within the streams. The relatively elevated concentrations of manganese and less extent iron may be associated with the local geology and the acidic nature of the soils. The high alkalinity and calcium concentrations are due to the limestone geology. The elevated phosphate concentration may be due to anthropogenic sources, fertilizers, or contributions from phosphorus-rich bedrock that differs geochemically from other areas.