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KAJIAN HIDROGRAF BANJIR DAERAH ALIRAN SUNGAI TANJUNG PARAK PADA PEMBANGUNAN EMBUNG PULAU TIGA Mashuri; Miskar Maini; Aulia Hidayat Burhamidar
Jurnal Infrastruktur Vol 8 No 1 (2022): Jurnal Infrastruktur
Publisher : Jurnal Infrastruktur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/infrastruktur.v8i1.3186

The Purpose of construction the reservoir to control flood and rainwater reservoir . In Rainy Season, Pulau Tiga Village always flood due to overflow of the Tanjung Parak river and at dry season, people have difficulty getting raw water. For this reason, it is necessary to build reservoir as an effort to control flooding and water absorption especially in rainy season and as rainwater reservoir to demand raw water people.The reservoir planning requires the study of the flood hydrograph in the Tanjung Parak Watershed using the synthetic unit hydrograph method. The SCS, Nakayasu, and ITB-1 method were used in flood hydrograph analysis. The performance of all HSS modeling are very good and qualified based on volume control value/ direct runoff (dro) is close to 1 where the HSS SCS method is 0,99891 with volume 749,18 m3, the nakayasu HSS method is 1,07161 with volume 803,71 m3 and the HSS ITB-1 method is 1,00821 with volume 756,16 m3. The peak discharge for the 25-year return period due to hyetograph 6 hours with the SCS Method 12.70 m3/ s with volume 39447,80 m3, the Nakayasu Method 13,14 m3/ s with volume 43758,16 m3 and the ITB-1 Method 12,76 m3/ s with 39658,17 m3. The value of HSS SCS method is considered to represent flood hydrograph in Tanjung Parak river because volume/ dro value is closer to 1 than HSS ITB-1 and HSS Nakayasu methods so peak discharge and hydrograph volume will be basic for calculations in planning reservoir dimensions and other.

EFEK ANGKUTAN SEDIMEN BED-LOAD TERHADAP HAMBATAN ALIRAN DI SUNGAI BATURUSA PULAU BANGKA Miskar Maini; Mashuri Mashuri; Junita Eka Susanti
Jurnal Teknik Sipil Vol 28 No 1 (2021): Jurnal Teknik Sipil
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2021.28.1.5

Abstrak Angkutan sedimen pada sungai alami tentunya memberikan dampak terhadap karakteristik pengalirannya. dampak adanya proses transpor sedimen tentu akan berpengaruh terhadap debit aliran yang terjadi di sungai. Debit aliran dipengaruhi terhadap parameter hidraulik, kemiringan dan nilai hambatan yaitu kekasaran dasar sungai. Adapun tujuan yang ingin dicapai dari studi ini adalah menganalisa efek material angkutan sedimen bed-load terhadap hambatan aliran atau koefisien kekasaran. Penelitian ini dilakukan di 10 (sepuluh) cross section pada Sungai Baturusa dengan pengambilan sampel bed-load di dasar sungai dan dilakukan pengujian gradasi ukuran butiran partikel sampel material bed-load sedangkan parameter kecepatan aliran diukur menggunakan Propeller Currentmeter dan diukur juga dengan metode pelampung dalam pengukuran kecepatan permukaan dengan faktor koreksi 0,85. Hasil analisis koefisien hambatan dengan angkutan sedimen (bed-load) menunjukkan nilai koefisien hambatan lebih besar dibandingkan tanpa angkutan sedimen (no bed-load), angkutan sedimen yang terjadi di Sungai Baturusa akan mempengaruhi nilai koefisien hambatan aliran. Sedangkan analisa debit aliran berdasarkan koefisien Manning yang digunakan beberapa metode semuanya memberikan selisih debit yang sangat besar terhadap debit terukur, penentuan nilai Manning memiliki pengaruh yang cukup besar dalam estimasi kecepatan aliran dan debit aliran., selain itu kecepatan aliran, pengaruh Fr dan U/U* juga memiliki pengaruh terhadap nilai koefisien kekasaran pada Sungai Baturusa. Kata-kata Kunci: Hambatan aliran, koefisien kekasaran, manning, sungai Baturusa Abstract Sediment transport in natural rivers certainly has an impact on their flow characteristics. The impact of the sediment transport process will certainly affect the flow rate that occurs in the river. Discharge effected hydraulic parameters, slope and resistance coefficient, namely river bed roughness. The objective of this study is to analyze the effect of the bed-load on the flow resistance or roughness coefficient. This research was conducted in 10 (ten) cross sections on the Baturusa River by taking bed-load samples on the river bed and testing the grading of the particle size of the bed-load material samples while the velocity parameters were measured using the Propeller Currentmeter and also measured by the float method in measurement. surface velocity with a correction factor of 0.85. The results of the drag coefficient analysis with sediment transport (bed-load) show the value of the drag coefficient is greater than without sediment transport (no bed-load), sediment transport that occurs on the Baturusa River will affect the value of the flow resistance coefficient. While the flow analysis based on the Manning coefficient used several methods, all of which provide a very large difference in discharge to the measured discharge, the determination of the Manning value has a large enough influence on the estimation of velocity and flow rate, besides velocity, the effect of Fr and U/U* also has an influence on the roughness coefficient value on the Baturusa River. Keywords: Flow resistance, roughness coefficient, manning, Baturusa river

Kajian Ketersediaan Dan Kebutuhan Air Baku Dengan Pemodelan Ihacres Di Daerah Aliran Sungai Tapung Kiri Mashuri Mashuri; Manyuk Fauzi; Ari Sandhyavitri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The demand of raw water in Kampar Districts is increasing in step with population growth. At this time, the water supply system is regulated by PDAM Tirta Kampar what still have problem to service coverage. Especially Tapung Sub-District has not been served. Therefore, the existence of the Tapung Kiri River is expected to be a solution to overcome these problems. Thisstudy use IHACRES for rainfall - runoff modeling, which in the calibration stage reach Nash- Sutcliffe effectiveness value of 0.630. Overall, this model provides an understanding that thesuccess obtained on the calibration stage does not guarantee success in the verification stage. Analysis of water availability is done to analyze the realable discharge river (Q90%) based onaverage annual the discharge resulting realable discharge occurred in 2000. The greatest realable discharge occured in October amounted to 93.75 m3/sec, and the smallest in Maretamounted to 43,69 m3/sec. Analysis of water demand is forecasted to the population growth of up to 22 years and produce raw water demand total with forecasts early of the year (2013) of 0.109 m3/sec and the end forecasts of the year (2035) of 0.264 m3/sec.Keyword : Tapung Kiri River, IHACRES model, Availability Water, Population Forecasts, Water Supply

EVALUATION OF PIPE NETWORK DISTRIBUTION SYSTEM USING EPANET 2.0 (CASE STUDY: SUBDISTRICT OF RAJABASA, BANDAR LAMPUNG Mashuri; M Gilang Indra Mardika; Alda Farida
Jurnal Infrastruktur Vol 9 No 1 (2023): Jurnal Infrastruktur
Publisher : Jurnal Infrastruktur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/infrastruktur.v9i1.4270

Generally, the distribution of clean water uses a distribution pipe network system consisting of pipes, pumps, reservoirs and others. With distribution pipe system, expected to be able to meet the water needs of domestic and non-domestic people. The increase in population will cause in greater consumption patterns of water demand. This research is focused on planning the piping network system in the distribution of water to fulfill the water demand of the people who has not been served entirely. The research location is in Rajabasa District, Bandar Lampung City. Based on a survey in the form of filling out questionnaires, people water use is 108.02 liters/person/day. The population growth rate is 4.23% so it is projected until 2040 to estimate volume clean water demand for people. Based on the Arithmetic Method, the population in Rajabasa Subdistrict is 106,235 people. In planning the pipeline network, a simulation of the distribution of clean water is carried out with the Epanet 2.0 Program. The model is designed and then simulated with network link and netrwok nodes in determining pipe diameters and pump systems. The pump system is used because a number of service areas are higher than the reservoir position in Rajabasa District. Based on the simulation, a reservoir is planned which is required to be able to hold water for the next 20 years. The reservoir capacity is 1,136 m3 so that the planned reservoir dimensions are 19 x 16 x 4 m and are expected to be able to fulfill the water demand of the people.

STUDY OF 1-D (ONE DIMENSIONAL) AND 2-D (TWO DIMENSIONAL) FLOOD MODELLING USING HEC-RAS 5.0.7 Mashuri; M Gilang Indra Mardika; Hayyu Sariyah
Jurnal Infrastruktur Vol 9 No 1 (2023): Jurnal Infrastruktur
Publisher : Jurnal Infrastruktur

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The Way Sulan River lies in Way Sulan's sub-watershed and often causes flooding during the rainy season. The disaster brought losses and damages as it caused inundation in the paddy fields and tore down the embankment and the bridge in the Way Sulan River. Flood mitigation is required to reduce the aftermath that may occur in the future. Flood modeling is a basic step of flood control to identify areas that are vulnerable of flooding. In this study, the flood modeling is carried out using HEC-RAS 5.0.7, performed by the 1-D and 2-D unsteady flow analysis. The flow hydrograph is calculated using the SCS SUH method and then used as an input on the HEC-RAS model. The calculation shows that the maximum design discharge for a 25-year return period is 124.416 m3/s. The flood modeling outputs show that the 2-D model provides a higher variation of the velocity and maximum water surface elevation than the 1-D model. The average ratio of the maximum velocity of the 1-D and 2-D models is 4.19%, while the average ratio of the maximum water surface elevation is only 1%. In the 1-D model, the highest velocity is 0.87 m/s at River Station 4580 (middle area) and the highest maximum water surface elevation is 8.77 m at River Station 6980 (upstream). On the other hand, the two-dimensional model gives the highest velocity at River Station 4580 (middle area) is 0.88 m/s and the highest maximum water surface elevation is at the River Station 8960 (upstream) which is 8.85 m. Based on the 2-D modelling, it is known that the potential flooded land-use area is 79.53 Ha of paddy fields, 6.83 Ha of farmland, and 4.59 Ha of the plantation.

STUDI PERSEBARAN BANJIR MENGGUNAKAN SOFTWARE HEC-RAS 2D V6.2 HULU DAS WAY SEKAMPUNG (STUDI KASUS: SUNGAI WAY MINCANG) Mashuri; M. Gilang Indra Mardika; M. Juang Renaldi Fiqri
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa Vol. 12 No. 1 (2023)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/pd.12.1.6105.97-105

The Way Mincang River, which is located in Pardasuka District, Pringsewu Regency, Lampung Province, is a periodic river whose flow often overflows during rainy season. The overflow of the Way Mincang River inundated several Pekon in Pardasuka District including the Pekon Tanjung Rusia, Tanjung Rusia Timur, Sukanegeri, Pardasuka and Kedaung. The aim of research to determine the flood discharge with a return period of 10, 25 and 50 years in 2 dimensions with the HEC-RAS v6.2 software, so that the water level and the area of flood-prone distribution in Way Mincang River can be identified. The research location is in Way Mincang Watershed with the downstream of river at coordinates 104.92 BT and -5.50 LS while the upstream of river at coordinates 104.92 BT and -5.57 LS with a river length of 10.29 km, average river width of 15 m-20 m and the study area 2371.34 Ha. The results of analysis show that discharge at periods of 10 years, 25 years and 50 years is 50.29 m3/sec, 63.11 m3/sec and 72.61 m3/sec. The maximum flood water level is 1.88 m in Pekon Pardasuka Timur and the maximum flood area is 0.31 km2 in Pekon Kedaung. Along the Way Mincang watershed is a flood-prone area where the entire pekon (village) is flooded but the coverage area is relatively small, namely <1 km2. This is confirmed by the ratio of total flood inundation and total area of only 5.24%. It is hoped that results of research can be used as a reference for stakeholders in terms of planning and improving Way Mincang Watershed.

PERENCANAAN SALURAN DRAINASE KAMPUS INSTITUT TEKNOLOGI SUMATERA Mashuri Mashuri; Ayudia Hardiyani Kiranaratri; Erik Satria
Teras Jurnal : Jurnal Teknik Sipil Vol. 11 No. 2 (2021): Volume 11 Nomor 2, September 2021
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v11i2.527

Abstrak Sebagai kampus baru, pembangunan infrastruktur Institut Teknologi Sumatera (ITERA) disegala sektor terus dilakukan demi upaya menunjang proses pembelajaran, namun berdampak pada perubahan alih fungsi lahan sehingga daya resap air semakin berkurang dan limpasan air permukaan semakin meningkat, sehingga perlu dilakukan perencanaan drainase yang terintegrasi dengan pembangunan. Perencanaan drainase meliputi analisis curah hujan, pengukuran lapangan dan perhitungan dimensi saluran serta simulasi pada software HECRAS. Metode rata-rata aljabar digunakan untuk analisis curah hujan wilayah dengan distribusi log pearson III. Dimensi saluran berupa persegi dengan lebar 0,56 m dan tinggi 0,73 m. Adapun debit saluran 0,53 m3/det dengan metode rasional, sedangkan total biaya perencanaan drainase sepanjang 1282,1 m ini sebesar Rp. 1.107.523.000 (Satu Milyar Seratus Tujuh Juta Lima Ratus Dua Puluh Tiga Ribu Rupiah). Dengan terbangunnya drainase diharapkan mampu mengalirkan limpasan air permukaan yang terjadi. Kata Kunci: ITERA, Drainase, Debit, HEC-RAS Abstract As a new campus, the infrastructure development of the Sumatera Institute of Technology (ITERA) in all sectors continues to support the learning process, however it has an impact on changes in land use so that water absorption capacity is decreasing and surface runoff is increasing, so it is necessary to carry out drainage planning that is integrated wit development. Drainage planning includes analysis of rainfall, field measurements and calculation of channel dimensions as well as simulations on the HECRAS. The aljabar method is used for the analysis of regional rainfall with a pearson III log distribution. The dimensions of the channel are square with widht of 0,56 m and height of 0,73 m. the channel discharge is 0,53 m3/s using the rational method. While total cost of drainage planning along the 1282,1 m is Rp 1.107.523.000, (one billion one hundred seven milion five hundred twenty three thousand rupiah). With the construction of the drainage is expected to be able to drain the surface runoff that occurs. Keywords: ITERA, Drainage, Discharge, HEC-RAS

Analisis Limpasan Sungai Way Kuripan Kota Bandar Lampung Akibat Pengaruh Curah Hujan Menggunakan HEC-RAS 5.0.7 Gung Bagus Jerfikanasa Murda; Mashuri Mashuri
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.1057

Abstrak Banjir akibat limpasan sungai didaerah padat penduduk dan industri menjadi masalah berulang jika antisipasi hanya dilakukan secara minor pada saat terjadinya bencana. Berdasarkan pengamatan lapangan, beralihnya wilayah resapan menjadi perumahan dan industri menjadi titik awal terjadinya limpasan akibat kejenuhan tanah dan koefisien limpasan terganggu. Paradigma mengalirkan air dari sub saluran menuju badan saluran besar adalah masalah yang menjadi tabiat dan dijalankan hingga kini. Berdasarkan permasalahan tersebut, penelitian ini bertujuan untuk menganalisa limpasan yang terjadi di Sungai Way Kuripan dengan rancangan periode ulang 25 tahunan dengan menggunakan software HEC-RAS 5.0.7. Fungsi sungai sebagai penyalur air harus diiringi sebagai wilayah resapan air dengan menjadikan sungai sebagai penampung, peresap, pengalir, dan pemelihara air. Mewujudkan sistem tampung, resap, alir, dan pelihara dilakuakan dengan reboisasi daerah hulu-hilir sungai dan daerah tampungan air (Embung). Kata kunci: Limpasan, HEC-RAS, Sungai, Embung,, Abstract Flooding caused by river runoff in densely populated and industrial areas becomes a recurring problem if only minor anticipation is carried out when a disaster occurs. Based on observations, the conversion of catchment areas to housing and industry is the starting point for runoff due to soil saturation and disturbed runoff coefficients. The paradigm of channeling water from sub-channels to large channels is a problem that has become a habit and is implemented to this day. Based on these problems, this research aims to analyze the runoff that occurs in the Way Kuripan River with a return period design of 25 years using HEC-RAS 5.0.7 software. The function of the river as a water distributor must be accompanied by a water catchment area, making the river a reservoir, absorber, diverter, and maintainer of water. Creating a reservoir, absorption, diverter, and maintenance water is carried out by reforesting the upstream and downstream areas of rivers and water storage areas (retention basins). Keywords: Runoff, HEC-RAS, River,Retention basin,

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