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Muhammad Ali

Universitas Bengkulu

Author-ID : 4277539

Civil Engineering, Building, Construction & Architecture

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PENGARUH ANGIN TERHADAP TINGGI GELOMBANG PADA STRUKTUR BANGUNAN BREAKWATER DI TAPAK PADERI KOTA BENGKULU Prima Nadia; Muhammad Ali; Besperi Besperi
Inersia: Jurnal Teknik Sipil Vol 5, No 1 (2013)
Publisher : Universitas Bengkulu

Tapak Paderi Beach have got many damages, such as abrasion, and sedimentation by waves. This research was made to find out wind effect as the secondary within significant wave height (Hs) and the structure of breakwater design at Tapak Paderi. This research used secondary data from the last ten years wind circulation (2002-2012) and a rising-subsiding data (May as the strongest one in 2009). The resources of data come from Meteorology and Geophysics Corporation (BMKG) II class Pulau Baai and Waskita Karya Manufactory for a dimensional data includes an illustration of breakwater construction. Also, primary data involves a report survey of wave height directly to Tapak Paderi location, Bengkulu. In accordance to the analysis, those data were obtained through the calculation of breakwater within sideway type. The calculation process resorted to worksheet program, 2,832 meters for significant wave height (Hs), and 8,399 seconds for significant period (Ts). The other calculation result is a set of wave condition which devised in the breakwater field will get breaking wave because of db>dLWL>dHWL, 5,385 meters for the peak of breakwater elevation, 6,435 meters for breakwater height, 3,867 tons for stones weight (W), 3,913 meters for peak width (B), and for the thickness of shelter layer (t) which made from three layers, 2,609 meters t1, 1,211 meters t2 ,0,446 meters for t3, and total of stones for each 10 m2 (N) is sixteen grain of stones. The last, these value have been used for redesign of sideway type.

ANALISIS KEHILANGAN AIR PADA SALURAN SEKUNDER (STUDI KASUS DAERAH IRIGASI BENDUNG AIR NIPIS BENGKULU SELATAN) Hasnul Efendi; Muhammad Ali; Rena Misliniyati
Inersia: Jurnal Teknik Sipil Vol 6, No 1 (2014)
Publisher : Universitas Bengkulu

The objectives of this research was to analyze how much the loss of irrigation water that occured in secondary channel at the irrigation area of Air Nipis Dam, South Bengkulu. Water losses were analyzed by using the method of debit in and out. The primary data were flow velocity, water depth, and cross section. In addition to primary data also used secondary data. They were temperature, wind speed, and humidity obtained from the Meteorology, Climatology and Geophysics Departement of Bengkulu. This research analyzed how much effect the percentage of water loss due to seepage and evaporation. From analysis calculations obtained the percentage of water loss value due to seepage and evaporation was not too significant. it can be concluded based on the observation of most water loss occurs due to the other factors, such as leaks in the lines, wild plant vegetation along the channel, etc. The results of this research showed that the percentage of total water loss value occurred on channel BN Kr 4 of 85,40% for the left secondary channel and channel BSB 1 of 74,16% for right secondary channels. While the value of the smallest percentage of total water loss occured in channel BN Kr 7 of 24,14% for the left secondary channel and channel BDA 1 of 22,53% for right secondary channels

STUDI MODEL SISTEM PENYERAP TENAGA GELOMBANG LAUT JENIS SILINDER OSILASI TERPASANG TETAP (FIXED OWC) Muhammad Ali
Inersia: Jurnal Teknik Sipil Vol 1, No 1 (2009)
Publisher : Universitas Bengkulu

Indonesia as archipelagic country have more than 3700 island and coastal region as long as 80.000 or twice travel around the world through equator (Triatmodjo, 1996). Indonesia have very long coast and potency of wave energy big sea. Energy wave sea can be permeated with system of Oscilating Water Column (OWC). System OWC represent exploiting of energy wave sea by using column of oscilating. Problems which significan in exploiting of appliance of OWC for water pump is increasing oscilating sea water. Ever greater oscilating sea water o sea hence is ever greater of yielded pump debit. At this article, research the studied is design of a model OWC with its tabletop made is open. Later;Then model to be put down in wave channel and treated with variation of depth water, high and period wave sea. The Result of examination on model of fixed OWC without wave concentration and without reflektor yield value of Ka between 1,05 till 1,23 for the d / gT2 between 0,02 till 0,062. Coefficient value of maximum amplification that is Ka = 1,23 reached at d/gT2 = 0,062. For deepness which remain to indicate that maximum Ka happened at smallest period. After result of examination of model with wave concentration and without reflektor, assess maximum amplifikasi happened at value of Ka = 1,4 for the value of d/gT2 = 0,052. While to model with wave concentration and use reflektor, assess maximum amplification happened at value of Ka = 1,4 for the d/gT2 = 0,04

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