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Effect of Roughened Flood Plain of Symmetrical Compound Channel on The Resistance of Flow | ||
| Al-Rafidain Engineering Journal (AREJ) | ||
| Article 6, Volume 24, Issue 1, 2019, Pages 31-38 PDF (1.31 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.33899/rengj.2019.163113 | ||
| Authors | ||
| Aws Younes Hamed* 1; Mwafaq Younes Mhammad2 | ||
| 1Department of Dams and water resources Engineering, }College of Engineering, University of Mosul, Mosul, Iraq | ||
| 2Department of Dams and water resources Engineering, College of Engineering, University of Mosul, Mosul, Iraq | ||
| Abstract | ||
| This research deals with the experimental study of the effect of roughened the flood plain of symmetrical compound channel (having 18 cm main channel and 29 cm flood plain width from both sides) on the resistance of flow using different size of gravel roughness (D50=6.8 ,16.8, 24,47) mm, as well as the flood plain is smooth. Five discharges (34,27.8,19.35,12,7.87)L/sec were carried out for each case, The compound channel was divided to 3 sections perpendicular to the direction of flow and each of them divided to 7 sections , 4 in flood plain and 3 in main channel . Pitot static tube used for velocity measurements and point gage for water surfacelevel measurement as well as the temperature of water was measurement, From the measurements it can be concluded that the velocity over the flood plain was reduced clearly up to 40 – 70 % when the flood plain roughened by course roughness compare with that of smooth one , while the velocity in the main channel increased to satisfy the continuity equation . Empirical equations were developed to combine the resistance coefficient n with other variables include the flow and geometry characteristics | ||
| Keywords | ||
| compound channel; roughness; velocity distribution; discharge; Froude number | ||
| References | ||
|
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9-حیدر،علی محسن " دراسة مختبریة للجریان الموضعی المتغیر فی القنوات المفتوحة "رسالة ماجستیرجامعة الموصل قسم السدود والموارد المائیة (2009) .
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