A Methodology for the Fast Comparison of Streamwater Diurnal Cycles at Two Monitoring Points
| Autor: | Dinu Iulian Oprea, Adrian Graur, Andrei-Emil Briciu, Constantin Filote |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Discrete wavelet transform
Baseflow 010504 meteorology & atmospheric sciences Multiresolution analysis Wavelet coherence Geography Planning and Development wavelet coherence 0207 environmental engineering 02 engineering and technology Aquatic Science Atmospheric sciences 01 natural sciences Biochemistry Water level Maxima and minima Diurnal cycle Environmental science 020701 environmental engineering script files mean diurnal profile 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Water Volume 11 Issue 12 |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w11122524 |
| Popis: | 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&ndash 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. |
| Databáze: | OpenAIRE |
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