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Water Quality Estimation Using Combined Water Chemistry and Field Spectroscopy in the Shenandoah River, Virginia

Water Quality Estimation Using Combined Water Chemistry and Field Spectroscopy in the Shenandoah River, Virginia

Mbongowo J. Mbuh, Paul R. Houser, Ako Heidari
Copyright: © 2019 |Pages: 26
ISBN13: 9781522570332|ISBN10: 1522570330|EISBN13: 9781522570349
DOI: 10.4018/978-1-5225-7033-2.ch071
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MLA

Mbuh, Mbongowo J., et al. "Water Quality Estimation Using Combined Water Chemistry and Field Spectroscopy in the Shenandoah River, Virginia." Environmental Information Systems: Concepts, Methodologies, Tools, and Applications, edited by Information Resources Management Association, IGI Global, 2019, pp. 1561-1586. https://doi.org/10.4018/978-1-5225-7033-2.ch071

APA

Mbuh, M. J., Houser, P. R., & Heidari, A. (2019). Water Quality Estimation Using Combined Water Chemistry and Field Spectroscopy in the Shenandoah River, Virginia. In I. Management Association (Ed.), Environmental Information Systems: Concepts, Methodologies, Tools, and Applications (pp. 1561-1586). IGI Global. https://doi.org/10.4018/978-1-5225-7033-2.ch071

Chicago

Mbuh, Mbongowo J., Paul R. Houser, and Ako Heidari. "Water Quality Estimation Using Combined Water Chemistry and Field Spectroscopy in the Shenandoah River, Virginia." In Environmental Information Systems: Concepts, Methodologies, Tools, and Applications, edited by Information Resources Management Association, 1561-1586. Hershey, PA: IGI Global, 2019. https://doi.org/10.4018/978-1-5225-7033-2.ch071

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Abstract

This study investigated the spatial dynamics of water quality across the Shenandoah River basin using spectroscopy and chemometrics to estimate chlorophyll (Chl), colored dissolved organic matter (CDOM) and turbidity using three band combinations and nutrients (total nitrogen and total phosphorous) in the Shenandoah River. The mean Chl a concentration for 555 nm, 560 nm and 640 nm were; 0.31 μg/l, 0.33 μg/l, and 0.51 μg/l respectively. Chlorophyll a showed strong correlations at band 640 (r = 0.92). The bands centered at 670/490 were the best in predicting CDOM and turbidity in the Shenandoah River Basin with an r2 = 0.56. Chemometrics analysis show that total phosphorous, nitrogen and turbidity can be predicted between 450 to 555nm and 670 to 710 nm, the range of wavelengths which indicated better predictability for spectroscopic analysis. The resultant concentration is used to develop predictive models to determine sensitive spectral variables for nitrogen, phosphorous, Chl-a, and CDOM.

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