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A Methodology for the Fast Comparison of Streamwater Diurnal Cycles at Two Monitoring Points

1
Department of Geography, Ștefan cel Mare University of Suceava, Universității 13, 720229 Suceava, Romania
2
Computers, Electronics and Automation Department, Ștefan cel Mare University of Suceava, Universității 13, 720229 Suceava, Romania
*
Author to whom correspondence should be addressed.
Water 2019, 11(12), 2524; https://doi.org/10.3390/w11122524
Received: 23 October 2019 / Revised: 25 November 2019 / Accepted: 27 November 2019 / Published: 29 November 2019
There are numerous streamwater parameters that exhibit a diurnal cycle. However, the shape of this cycle has a huge variation from one parameter to another and from one monitoring point to another on the same river. Important variations also occur at the same point during some events, such as high waters. Water level, specific conductivity, dissolved oxygen, oxidation reduction potential, and pH of the Suceava River were monitored for 365 days (2018–2019, hourly sampling frequency) in order to assess the upstream-downstream changes in the diurnal cycle of these parameters, some of these changes being caused by the impact of Suceava city, which is located between the selected monitoring points. The multiresolution analysis of the maximal overlap discrete wavelet transform and the wavelet coherence analysis were combined in a flexible methodology that helped in comparing the upstream and downstream shapes of the diurnal cycle. The methodology allowed for a fast comparison of diurnal profiles during periods of high waters or baseflow. Notable changes were observed in the moments of diurnal maxima and minima. View Full-Text
Keywords: script files; mean diurnal profile; wavelet coherence script files; mean diurnal profile; wavelet coherence
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Briciu, A.-E.; Graur, A.; Oprea, D.I.; Filote, C. A Methodology for the Fast Comparison of Streamwater Diurnal Cycles at Two Monitoring Points. Water 2019, 11, 2524.

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