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Issue 17 (4) 2018 pp. 143-155

Adam Nowak, Leszek Książek

Department of Hydraulic Engineering and Geotechnics, Faculty of Environmental Engineering and Land Surveying, University of Agriculture in Kraków

EFFECT OF THE ACCURACY OF RIVERBED MEASUREMENTS USING ADCP ON THE STRUCTURE OF WATER TABLE AT DISCHARGE Q1%

Keywords: ADCP current profiler, one-dimensional model, accuracy of riverbed configuration measurements, flood hazard areas
Abstract:

In order to verify the impact of riverbed measurement using the Acoustic Doppler Current Profiler (ADCP) based on the Doppler effect on the accuracy of the structure of groundwater table simulated in the numerical model, two series of field measurements were performed in the Skawa River, and another series in a hydraulic laboratory. The baseline measurements of gravel riverbed were conducted using the classical method, by applying a measuring device. Precise measurement of riverbed elevations in the field was possible thanks to the use of a portable stable measuring station, which eliminates the impact of a moving float on the measurement being performed. The obtained results were evaluated using the t-Student test, as well as the methods proposed by Ozga-Zielińska with Brzeziński, Moriasi, and Legates with McCabe. The analysis of the conformity between the results obtained using the ADCP methods and the baseline measurements showed very good compatibility in the representation of riverbed elevations for the RSR, NSE and PBIAS evaluation statistics in the case of the laboratory series. The values obtained in both field series revealed an unsatisfactory representation of the riverbed elevations of the RSR and NSE evaluation statistics. Differences in the riverbed level have translated into differences in the water table structure. For the discharge of Q1%, the said differences do not exceed 0.066 m, which corresponds to the effective grain size of the rubble of dm. Measurement of the riverbed configuration using the ADCP affects the structure of the water table and thus also the flood hazard zone. In mountainous areas, where the depth differences of the riverbeds and floodplains are significant, this impact is limited.

pub/17_4_143.pdf Full text available in in Adobe Acrobat format:
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DOI: 10.15576/ASP.FC/2018.17.4.143

For citation:

MLA Nowak, Adam, and Leszek Książek. "EFFECT OF THE ACCURACY OF RIVERBED MEASUREMENTS USING ADCP ON THE STRUCTURE OF WATER TABLE AT DISCHARGE Q1%." Acta Sci.Pol. Form. Cir. 17.4 (2018): 143-155. http://dx.doi.org/10.15576/ASP.FC/2018.17.4.143
APA (2018). . Acta Sci.Pol. Form. Cir. 17 (4), 143-155 http://dx.doi.org/10.15576/ASP.FC/2018.17.4.143
ISO 690 NOWAK, Adam, KSIążEK, Leszek. EFFECT OF THE ACCURACY OF RIVERBED MEASUREMENTS USING ADCP ON THE STRUCTURE OF WATER TABLE AT DISCHARGE Q1%. Acta Sci.Pol. Form. Cir., 2018, 17.4: 143-155. http://dx.doi.org/10.15576/ASP.FC/2018.17.4.143
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Streszczenie w języku polskim:
http://www.formatiocircumiectus.actapol.net/tom17/zeszyt4/abstrakt-143.html