KARAKTERISTIK ALIRAN TIDAK SERAGAM DENGAN SEDIMEN SUSPENSI PADA SALURAN TERBUKA
ABSTRACT: The suspended
sediment phenomenon has a close relationship with the water system in a river.
The complexity of suspended sediment
phenomenon, as well
as the turbulence
and non-uniformity of
flow will cause
differences characteristics from the
uniform flow condition. The characteristics of suspended sediment of
non-uniform open channel flow were studied using experimental method, by taking
a direct measurement in the sediment-recirculating flume at the Hydrology and
Hydraulic Laboratory of
PS-IT UGM. The
optical silt measuring
instruments of Foslim-probe
type was used for measuring
the concentration distribution of the
suspended sediment. While to measure the velocity distribution, electromagnetic
flow meter probe set of VM-201H type combined with the vector calculation
equipment of DV-101 type were used. Fifty
series of measurements,
which comprise of
eighteen series of
uniform flows, eighteen
series of non-uniform decelerated flows, and fourteen
series of non-uniform accelerated flows were obtained in this study. The result
of this study shows that the integration constant value of the logarithmic-law,
stated as Br, tends to be smaller than the Br-value of clear water. The
Br-value tend to increase with the increasing of pressure gradient value of
non-uniform flow, n. The Coles wake parameter, , shows a
similar trend with the Br-value, in which, the -value tend to increase with the
increasing of n-value. The equation of Rouse, as well
as, the equation of Tanaka and Sugimoto for uniform flow can predict the
sediment concentration distributions of non uniform flow data satisfactory.
Keywords: accelerated and
decelerated non-uniform flows, velocity and suspended sediment distributions
Penulis: Bambang Agus Kironoto,
Lutjito, Dwi Handaya Nugraha
Kode Jurnal: jptsipildd070016
