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Hydrology 2019, 6(1), 27;

Real-Time Measurement of Flash-Flood in a Wadi Area by LSPIV and STIV

Disaster Prevention Research Institute (DPRI), Kyoto University, Kyoto 611-0011, Japan
Author to whom correspondence should be addressed.
Received: 8 January 2019 / Revised: 17 March 2019 / Accepted: 18 March 2019 / Published: 20 March 2019
PDF [3333 KB, uploaded 20 March 2019]


Flash floods in wadi systems discharge large volumes of water to either the sea or the desert areas after high-intensity rainfall events. Recently, wadi flash floods have frequently occurred in arid regions and caused damage to roads, houses, and properties. Therefore, monitoring and quantifying these events by accurately measuring wadi discharge has become important for the installation of mitigation structures and early warning systems. In this study, image-based methods were used to measure surface flow velocities during a wadi flash flood in 2018 to test the usefulness of large-scale particle image velocimetry (LSPIV) and space–time image velocimetry (STIV) techniques for the estimation of wadi discharge. The results, which indicated the positive performance of the image-based methods, strengthened our hypothesis that the application of LSPIV and STIV techniques is appropriate for the analysis of wadi flash flood velocities. STIV is suitable for unidirectional flow velocity and LSPIV is reliable and stable for two-dimensional measurement along the wadi channel, the direction of flow pattern which varies with time. View Full-Text
Keywords: discharge; wadi flash flood; LSPIV; STIV; real time; surface flow velocity discharge; wadi flash flood; LSPIV; STIV; real time; surface flow velocity

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Al-mamari, M.M.; Kantoush, S.A.; Kobayashi, S.; Sumi, T.; Saber, M. Real-Time Measurement of Flash-Flood in a Wadi Area by LSPIV and STIV. Hydrology 2019, 6, 27.

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