水工学論文集第61巻
A MOUNTAINOUS RIVER FLOW FLUCTUATION ANALYSIS USING SHALLOW-WATER ACOUSTIC TOMOGRAPHY SYSTEM
2017 年 73 巻 4 号 p. I_19-I_24
詳細
2017 年 73 巻 4 号 p. I_19-I_24
The aim of this contribution is to investigate the scaling exponent properties of a mountainous river flow fluctuations analyzed by means of detrended fluctuation analysis (DFA). Streamflow data were collected using Fluvial Acoustic Tomography System (FATS) which is a novel approach for continuous streamflow measurements at a high frequency. The crossover times evaluated from discharge data collected by FATS showed a relative delay estimated by 36±6% approximately in contrast to the times detected by the conventional streamflow measurement approaches. Moreover, the detected crossover time seems to be mainly a function of the watershed area and the higher number of intense precipitation events.
