Experimental analysis for self-cleansing open channel design

Mir Jafar Sadegh Safari*, Hafzullah Aksoy

*Corresponding author for this work

Research output: Contribution to journalComment/debate

20 Citations (Scopus)


Self-cleansing is a hydraulic design concept for drainage systems for mitigation of sediment deposition. Experimental studies in the literature have mostly been performed in circular channels. In this study, experiments were conducted in five cross-section channels: trapezoidal, rectangular, circular, U-shape and V-bottom to investigate the non-deposition condition of sediment transport in rigid boundary channels. Deficiencies of conventional self-cleansing design based on a single value of velocity or shear stress and Camp criteria are highlighted in terms of channel cross-section shape; considering a higher number of hydraulic parameters, self-cleaning models are proposed for each cross-section channel; and finally, in order to make a general practical tool by incorporating a cross-section shape factor, a self-cleansing model is proposed to calculate the flow mean velocity at non-deposition conditions of sediment transport. The general self-cleaning model outperforms its alternatives when applying experimental data collected in this study and five datasets taken from the literature.

Original languageEnglish
Pages (from-to)500-511
Number of pages12
JournalJournal of Hydraulic Research/De Recherches Hydrauliques
Issue number3
Publication statusPublished - 2021

Bibliographical note

Publisher Copyright:
© 2020 International Association for Hydro-Environment Engineering and Research.


This study was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under the Project 114M283. The study has also received partial support from the Scientific Research Projects Unit of Istanbul Teknik Üniversitesi under the project 37973. The authors would like to express sincerest appreciation to Editor-in-Chief, Associate Editor and three anonymous reviewers for their highly insightful comments that improved the quality of this manuscript. Special gratitude goes to Dr Necati Erdem Unal from Istanbul Technical University for his support during the performing of the experiments.

FundersFunder number
Scientific Research Projects Unit of Istanbul Teknik Üniversitesi37973
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu114M283
Istanbul Teknik Üniversitesi


    • Drainage systems
    • non-deposition
    • rigid boundary channel
    • sediment transport
    • self-cleansing
    • sewer systems


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