Melihat masifnya kerugian yang diderita manusia akibat gempa bumi, maka peningkatan kualitas infrastruktur semakin intensif dilakukan. Peningkatan tersebut dilakukan dengan penelitian-penelitian yang dilakukan demi meningkatkan ketahanannya terhadap gempa, seperti penemuan-penemuan material dan metode konstruksi alternatif. Gencarnya peningkatan ketahanan bangangun-bangunan ini, sayangnya kurang diimbangi dengan peningkatan pemahaman masyarakat terhadap bencana gempa bumi dan sikap tanggap dalam menghadapi bencana gempa bumi. Provinsi Bengkulu, sebagai wilayah yang mengalami gempa bumi perlu mempersiapkan warganya dengan pengetahuan dalam menghadapi gempa bumi. Kejadian gempa bumi pada tahun 2007 ternyata masih menimbulkan trauma bagi masyarakat Provinsi Bengkulu. Tim Pengabdian Pada Masyarakat Program Studi Teknik Sipil, Fakultas Teknik, Universitas Bengkulu, memilih SMA Negeri 1 Kabupaten Seluma dengan sasaran kegiatan ini adalah siswa, guru, dan pengguna gedung sekolah lainnya. Kegiatan ini diharapkan dapat meningkatkan kiprah tim pengabdian masyarakat dari Universitas Bengkulu di bidang mitigasi bencana serta meningkatkan pemahaman mengenai gempa bumi dan kesiapsiagaan masyarakat menghadapi gempa bumi.
Abstrak: Prediksi Perubahan Garis Pantai Bengkulu (Studi Kasus Pantai Zakat Kota Bengkulu). Kota Bengkulu merupakan daerah pantai yang berpotensi menjadi objek wisata salah satunya Pantai Zakat yang akan menjadi lokasi penelitian. Penelitian ini dimulai pada koordinat 3°47’4,71” Lintang Selatan - 102°15’26,88” Bujur Timur sampai dengan 3°46’38,52” Lintang Selatan - 102°15’43” Bujur Timur bertujuan untuk mengetahui proses perubahan garis pantai, dan proses sedimentasi-abrasi di pantai Zakat Kota Bengkulu. Penelitian ini memprediksi perubahan garis pantai 5 tahun. Prediksi perubahan garis pantai didekati dengan pendekatan model dengan GENESIS (Generalized Model for Simulating Shoreline Change). Hasil penelitian menunjukkan dalam kurun waktu 5 tahun (2020-2025) mengalami abrasi sebesar 2,823 m dan sedimentasi sebesar 1,677 m. Dengan demikian pantai Zakat Kota Bengkulu dalam kurun waktu 5 tahun akan mengalami sedimentasi dan abrasi. Kata kunci : Perubahan Garis Pantai, Sedimentasi, Abrasi, GENESIS Abstract: Prediction of Changes in Bengkulu Beach Line (Case Study Zakat Beach City of Bengkulu City). Bengkulu City is a coastal area that has the potential to become a tourist attraction, one of which is Zakat Beach which will be the study location. This study begins at coordinates 3°47'4,71" S 102°15'26,88" E to 3°46'38,52" S, 102°15'43" E to conducted to find out the process of shoreline change, and the process of sedimentation-abrasion at the Zakat beach of Bengkulu City. This study predicts the shoreline changes over the next 5years. The prediction of shoreline changes is approached with GENESIS (Generalized Model for Simulating Shoreline Change) approach model. The results showed within 5 years (2020-2025) the shoreline will experience abrasion of 2.823 m and sedimentation of 1,677 m. Thus Zakat beach of Bengkulu city in period 5 years will experience abrasion and sedimentation. Key words: Shoreline Change, Sedimentation, Abrasion, GENESIS
Abstract The Design discharge is the important data needed for design of the water infrastructure. The purpose of this study is to estimate the design discharge with a variety of times using a frequency analysis in the Air Bengkulu Sub-watershed. Rain fall data were obtained from the BMKG of Bengkulu province, its starting from 2009 to 2018 years. The design flood estimation method used a statistical method. It is using the distribution method. The initial stage of the research is to process rain data and then conduct frequency analysis. The mathematical equation for frequency analysis includes statistical equations to determine the average value, standard deviation, coefficient of variation, skewness coefficient and kurtosis coefficient. The method used in determining the type of distribution for frequency analysis in this study uses the Gumbel Type I distribution method, Pearson Log Type III, Normal, and Normal Log. Distribution fit test was performed with chi square test and Kalmogorof Smirnov test. The results of estimated design discharges for the 2 years return period, 5 years return period, 10 years return period, 25 years return period, 50 years return period and 100 years returns period in the Air Bengkulu down stream Sub-watershed are respectively 125.16 m3 / sec (2 years return period), 145.24 m3 / sec (5 years return period), 157.59 m3 / sec (10 years return period), 172.43 m3 / sec (25 years return period), 183.03 m3 / sec (50 years return period) and 193.34 m3 / sec (100 years return period). Keywords: watershed, Air Bengkulu, Design Discharge, Frequency Analysis, Distribution Analysis
Irrigation efficiency is a major determinant in the system of scheme irrigation . Irrigation efficiency is assumed as part of water would be lost either in the channel or at the rice terraces. Water loss estimate in efficiency include loss of water efficiency tertiary and secondary level, water loss is influenced by the length of the channel, the surface area of the channel, the wet cross section and the position of groundwater. The analysis in this study is to calculate thevalue of the efficiency the secondary and the tertiary canals of irrigation of Kemumu, North Bengkulu. Efficiency is accounted based on the length of the channel, sectional area of wet channel, water velocity, water loss, evaporation and seepage channel. The water loss average of secondary channel is 26,12 mm3/sec. seepage average for secondary channel is 5,06 x 10 mm/day. Evaporation in one year is 0,05 mm/day. The results of this study stated that the efficiency of the secondary channel efficiently deliver water from the primary channel to channel tertiary the average of efficiency is about 11,92%. The result of this analysis is expected that not efficient channels in Kemumu North Bengkulu can be fixed, so thewater that rice field needed can be fulfilled. The channels can be fixed with some ways, such as making theconcrete irrigation and doing the rutine maintenance.
This research aims to desaign of sideways breakwater as an effort to anticipate the water overflow On The Revetment Building At Malabero Beach Bengkulu City. The data used is primary data and secondary data. Primary Data Processing Method Used in Field Direct Namely Collection (Hs and Ts), while the secondary data analysis method using wind data, analysis data tides and topography. The results of the breakwater have the elevation 0f 5,55m, width 3,71 m on the head and 3,91 m on the arms. Weight unit protective cover breakwater head W=3,31 tons, W/10=331 kg, W/200=16 kg and the arms W= 3,87tons, W/10=387 kg,W/200= 19 kg. With 13 and 12 slides of cover in each 10 m on the head and arm.
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