WATER SURFACE SLOPE AND STREAMFLOW HYSTERESIS PATTERNS ACCORDING TO DIFFERENT HYDROLOGICAL FLOODS

• ALSAWAF Mohamad Basel

  Dept. of Civil and Environmental Eng., Hiroshima University

• KAWANISI Kiyosi

  Dept. of Civil and Environmental Eng., Hiroshima University

Abstract

 In this study, we provide a contribution toward monitoring the unsteady behavior of discharge-stage hysteresis in a mountainous river. In order to monitor the unsteady patterns of river discharge hysteresis estimated by means of a novel fluvial acoustic tomography system (FATS), we therefore observed the corresponding river water surface slopes hysteresis during different rainfall events. We found that the temporal variations in water surface slope-stage during different scales of rainfall events resulted in different patterns of hysteresis loops which can be classified into three main categorizes: (i) no hysteresis, (ii) clockwise hysteresis, and (iii) counterclockwise hysteresis. In the case of low intensity rainfall events, no hysteresis behavior was detected. Meanwhile, for medium and high intensity rainfall events resulted in either clockwise or counter clockwise (WS-WL) hysteresis patterns. Finally, for medium and high intense hydrological events, water surface slope become almost constant after passing a certain level.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 74 (5), I_181-I_186, 2018

  Japan Society of Civil Engineers

Keywords

• Streamflow
• stage-slope
• stage-discharge
• hysteresis
• FATS

Details

• CRID: 1390283659826013440
• NII Article ID: 130007757836
• DOI: 10.2208/jscejhe.74.5_i_181
• ISSN: 2185467X
• Web Site: https://www.jstage.jst.go.jp/article/jscejhe/74/5/74_I_181/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed