Pengaruh Penempatan Baffle Blocks Tipe V Terhadap Reduksi Panjang Loncatan Air dan Energi Aliran Pada Pengalir Bendung Tipe Ogee

Budiarsyad, Gadang and ., Ir. Jaji Abdurrosyid, MT. (2018) Pengaruh Penempatan Baffle Blocks Tipe V Terhadap Reduksi Panjang Loncatan Air dan Energi Aliran Pada Pengalir Bendung Tipe Ogee. Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

Water is one of the primary necessities for living beings on earth. One way to utilize water is a weir. The water level raising caused by the dam causes the flow of super critis in the downstream of the dam and will lead to water leap. The effect of this water jump is still to erode the bottom of the river downstream of the weir. To reduce the scouring downstream of stilling basin, then installed baffle blocks in stilling basin. The purpose of this study was to examine the performance of weirs with ogee spill. Another test is to test the effectiveness of type V baffle blocks in reducing flow energy, water jump length and flow turbulence compared with half-cylinder block baffles. Experiments in this study were conducted at the Hydraulics Laboratory of Civil Engineering Faculty of Engineering Muhammadiyah University of Surakarta. This research uses flume tool with size 30 cm × 60 cm × 1000 cm, slope base 0,0058 channel. Mercu dam using ogee type. The ojek pool uses a USBR-II type using two variations of baffle blocks. Total running done as many as 35 running. The results show some conclusions. First, the best baffle block arrangement to absorb flow energy is baffle blocks with 75 ° angle placed at the beginning of the pond. secondly, the most effective baffle block position to reduce water jump length is baffle blocks with 75 ° angle placed with zig-zag position on stilling basin with performance percentage of 29.82%. Third, the performance of the most effective baffle block shape and position reduces turbulence downstream of the vortex is baffe blocks with a 75 ° angle placed in zigzag position on the stilling basin. Fourth, the comparison of the formula used between the formula of Bambang Triatmojo and also from the book of Irrigation Planning Criteria with the USBR-II graph does not have a significant difference, a considerable difference only in water jump lengths in the two formulas. Finally, Froude Number 12.28 is obtained at the lowest discharge and in the most effective baffle block arrangement proves that USBR-II usage is correct for this experiment, considering the minimum usage of USBR-II Froude Number is 4.5.

Item Type:	Karya ilmiah (Skripsi)
Uncontrolled Keywords:	Ogee Spill, Angle of baffle blocks, Energy dampers
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Fakultas Teknik > Teknik Sipil
Depositing User:	GADANG BUDIARSYAD
Date Deposited:	10 Aug 2018 03:52
Last Modified:	10 Aug 2018 03:52
URI:	http://eprints.ums.ac.id/id/eprint/64185

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