02711nam a2200397 4500 20260818095814.0 251197 th eng .b10241711 AIT Thesis no. 232 Charng, Der-ruenn Energy dissipation in open channels by large semi-circular disk roughness elements Bangkok : Asian Institute of Technology, 1969 66 p. Thesis ; no. 232 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand Thesis (M.Eng.) - Asian Institute of Technology, 1969 The study of flow resistance in very steep and rough open channels has direct application to many streams in the upper regions of a drainage basin. Steep channels, causing a high gradient flow in a very rough channel, also provide a means of using large roughness elements for energy dissipation. Flume tests were conducted using semi-circular disks as roughness elements. The disks were made of aluminum sheets. The relative depths investigated ranged from approximately 1 to 6. From the experimental results, no meaningful relationships could be found between the flow resistance C/ {u221A} g, the relative depth y/k and geometric parameters describing the channel shape. This indicated that other variables such as air entrainment and the Froude number of the flow, which were originally not considered to be significant, were important in describing the flow phenomenon. Hydraulics Ackermann, Norbert L., Chairperson Flammer, Gordon H., Examination Committee Asian Institute of Technology, Scholarship Donor Asian Institute of Technology. Thesis ; no. 232 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B24650 .b10241711 mnait v 260702 3 951012 m a v 0 mnait mnait mnarc 20 40 Barcode : 30050002898822 CREATED : 1994-05-17 RECORD # : i10295938 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003093654 CREATED : 1994-05-17 RECORD # : i1029594x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160111737 CREATED : 2016-08-04 RECORD # : i12930209 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 37291 37291 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. 232 30050002898822 2026-08-18 09:58:14 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. 232 30050003093654 2026-08-18 09:58:14 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. 232 30050160111737 2026-08-18 09:58:14 2026-08-18 40