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Simulasi dan Evaluasi Limpasan Saat Debit Maksimum Kanal Banjir Timur Kota Semarang Prasetyo Budi Cahyono; Slamet Imam Wahyudi; Mohammad Faiqun Niam; Dani Prasetyo
BRILIANT: Jurnal Riset dan Konseptual Vol 7 No 2 (2022): Volume 7 Nomor 2, Mei 2022
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (439.135 KB) | DOI: 10.28926/briliant.v7i2.963

Abstract

Penelitian ini bertujuan menganalisis data hidrologi dan limpasan saat Debit Maksimum (Q50, Q100) di alur sungai, kemudian diimplementasikan pada pekerjaan normalisasi Kanal Banjir Timur Semarang. Penelitian berupa simulasi yang dievaluasi dengan pengamatan dan pencatatan besaran tingkat elevasi banjir yang terjadi pada saat debit banjir maksimum di Q50 dan Q100 terhadap tingkat limpasan air yang melewati top elevasi parapet. Metode peneltian yang dilakukan adalah studi kasus dengan analisa kuantitatif terhadap semua data yang ada mulai dari data topografi, hidrologi dan geoteknik mekanika tanah. Penelitian diawali analisa curah hujan hingga didapat debit banjir maksimum dari Polygon Theiseen Data Curah hujan 3 stasiun yang mencakup DAS Kanal Banjir Timur diarah hulu. Langkah selanjutnya dilakukan analisa cross section sungai dengan mengambil titik sample lokasi penelitian yang dimulai dari Jembatan Kartini Semarang sampai kearah muara sungai. Data pengukuran existing yang ada kemudian diinput dan diolah dengan analisa program hec-ras. Dari urutan Log Pearson Type III dan kalibrasi pendekatan data BBWS Pemali Juana diperoleh angka Debit Maksimum 418,17 m3/det, (Q50) 462,52 m3/detik, (Q100) debit andalan sebesar 0,39 m3/s.  Catchment Area = 310 km2 = 63.725,87 m3/tahun; Luas hidrolis (A) sebelum normalisasi 45m2 dan sesudah normalisasi 112m2, sehingga didapat luas penampang sungai yang lebih besar; dimana luas penampang ini berbanding lurus dengan penurunan top elevasi pada saat debit maksimum dialur sungai. Elevasi Q50 sebelum normalisasi +4,4m (melimpas) dan setelah normalisasi +3,54m. Sedang Q100 sebelum normalisasi +4,84; setelah normalisasi +3,89m sehingga bisa tertahan oleh dinding parapet di top elevasi +4,4m dan tidak terjadi limpasan.
DESAIN DAN ANALISIS MEKANISME BENDUNG GERAK DENGAN RADIAL GATE UNTUK PENANGANAN BANJIR ROB Dirga Asmara Putra; Henny Pratiwi Adi; Slamet Imam Wahyudi
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol 27, No 1 (2022): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v27i1.3668

Abstract

Tidal floods are high tides that occur excessively on the mainland. Radial gate weiris a door building that moves around in a cylindrical shape to regulate the waterlevel elevation. This study aims to determine the influence factor of the radial gatemovement weir mechanism, analyze the fluid mechanics of the radial gate duringtidal flooding. This research is experimental design research, namely, making aprototype design of the radial gate motion weir mechanism and analysis ofparameter data in the form of hydrostatic pressure, hydrodynamic pressure, criticalflow, and sub critical flow. The conclusion of this study is, the design is planned towork when: the automation system runs because the two proximity sensors touch the30 cm water level, activate the linear actuator to close the radial gate, the waterpump turns on and 15 cm opens the radial gate, the water pump stops. The results ofparameter data analysis: hydrostatic pressure of water level 30 cm = 32.0 N/m2,hydrodynamic pressure due to earthquake according to (DSI) in Cilacap = 0.1211tf/m2, BMKG SIG (III/Light)= 33,600 tf/m2, (IV/ Medium)= 96.075 tf/m2,(V/Weight)= 148.3125 tf/m2. Critical flow rate of water level is 15 cm = 0.0149m3/second, sub-critical flow rate is 0.0098 m3/second.
Analisis Pemilihan Desain Jembatan Dengan Menggunakan Metode Analytical Hierarchy Process (AHP) Wirdha Ningsih; Slamet Imam Wahyudi; Henny Pratiwi Adi
Musamus Journal of Civil Engineering Vol 4 No 02 (2022): Musamus Journal of Civil Engineering
Publisher : Musamus University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35724/mjce.v4i02.4405

Abstract

Perencanaan desain jembatan dalam pembangunan infrastruktur jalan sangat berperan dalam menentukan bentuk konstruksi dan fungsinya, yang meliputi: aspek lalu lintas, aspek hidrologi, aspek teknis, dan aspek estetika dimana hal ini menjadikan sebagai faktor dalam menata kota guna dijadikan sebagai pusat pemekaran kota setempat. Dengan menggunakan metode Analytical Hierarchy Process (AHP) sebagai dasar pengambilan keputusan dalam pemilihan desain jembatan yang sesuai. berdasarkan kriteria-kriteria yang telah ditentukan. Hasil analisis penentuan pemilihan Desain Jembatan Sungai Takondeang, dari ke 8 responden yaitu. Jembatan Kabel (cable stayed) adalah prioritas utama dengan nilai bobot sebanyak 0.340 atau 34%, kemudian proritas kedua adalah Jembatan Pelengkung Mengikat (tied arch bridge) dengan nilai bobot 0.277 atau 28%, pilihan ketiga yaitu Jembatan Pelengkung Dek (deck arch bridge), dan yang terakhir adalah Jembatan Gantung (suspension bridge) dengan nilai bobot terendah 0.166 atau 17%. Maka disimpulkan bahwa jembatan kabel memiliki perolehan nilai aspek lalu lintas 0.073, aspek hidrologi 0.106, aspek teknis 0.211 dan untuk evaluasi terakhir aspek estetika yang memperoleh nilai bobot tetinggi sebesar 0.609.
Analisis Saluran Drainase di Pusat Kota Jepara dengan Program EPA SWMM 5.1 dan HEC RAS 4.1.0 Shiska Fauziah; Slamet Imam Wahyudi; Hermin Poedjiastoeti
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 10 No 2 (2022): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (Juli 2022)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v10i2.3197

Abstract

From land value data sourced from the Central Bureau of Statistics of Jepara Regency that in Panggang Village, Jepara District, the transfer of land use for buildings is very high, which shows a percentage of 70.98%, therefore resulting in an open area in Jepara Regency for rainwater infiltration, especially in the main route segment is reduced, resulting in flooding and puddles in the city center location. Floods that occur are 40 cm to 80 cm high when it rains in the urban center area, there are several inundation points in the Jepara square, Kartini street, and Jepara's Chinatown area, and several other roads. The channel in Panggang Village is one of the infrastructures that supports the functioning of an urban system in Jepara City. In the existing channel along the Wiso River area, inundation often occurs every rainy season, so it is necessary to conduct a study to analyze the capacity of the drainage channel. The data used in planning is secondary data. Secondary data was obtained from the schematic drawing of the drainage channel and data regarding the dimensions of the channel and hydrological data. The hydrological and hydraulic data obtained were then analyzed to obtain the design discharge and drainage channel capacity. The design discharge is calculated using the rational method and the channel capacity is calculated using the HEC RAS ​​4.1.0 and EPA SWMM 5.1 software modeling. This study examines Drainage Channel Capacity Analysis to evaluate flooding based on the existing condition of drainage channels that affect the occurrence of flooding using HEC RAS ​​4.1.0 and EPA SWMM 5.1 software models. HEC RAS ​​4.1.0 software. Based on the results of hydrological analysis, the distributions chosen are Gumbel Type I Distribution and Log Pearson Distribution Type III. In the fit test, it was concluded that the Log Pearson Type III distribution method met the requirements because the Dmax value of -0.0202 was less than Do 0.41. and hydraulic analysis obtained by software HEC RAS ​​4.1.0 and EPA SWMM 5.1. at the 1 year return period there are 2 points that experience flooding and 4 points that are able to accommodate flood discharge. The flood points are scattered in several areas in Panggang Village, namely Jl. RA. Kartini and Jl. Youth. In dealing with flooding, it is necessary to re-plan the drainage for the 10-year return period in order to create security and comfort for local residents.
Design and selection of alternative embankments to overcome tidal flood (A case study of the construction plan of a tidal embankment at Sayung, Demak) Lulut Riyan Utomo; Henny Pratiwi Adi; slamet Imam Wahyudi
Pondasi Vol 27, No 2 (2022): Desember 2022
Publisher : UNISSULA Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/pondasi.v27i2.28071

Abstract

Tidal embankment project in Sayung is one of the construction planning projects of the government. There are three alternatives of embankment designs that may be applied in the construction project; (1) Parapet Wall and Corrugated Concrete Sheet Pile (CCSP) reinforcement, (2) Concrete Wall Embankment with mini pile reinforcement, and (3) Multipurpose Panel System Embankment (SPS). The research was needed to examine the designs to find the fittest. This study aimed to redesign the construction plan of the tidal embankment using Plaxis software. This software was to analyze and determine the safety factors of the three alternative embankment designs. It was stated to be safe because it exceeded the standard of 1.5. One of the three alternative embankments was implemented using the Analytical Hierarchy Process (AHP) method based on predetermined criteria: (1) Aspects of function and benefits, and (2) Aspects of site conditions which include cost and construction process. From the alternative selection using the expert choice program analysis method, the concrete wall embankment with mini-pile reinforcement was the main priority, with a weight value of 45.9%. Meanwhile, the second priority was the Parapet Wall and CCSP Reinforcement with a weight value of 37.2%, and the third choice was the Multipurpose Panel System Embankment (SPS) with a weight of 17%.
THE PERFORMANCE AND THE INFLUENCE OF PHYSICAL INFRASTRUCTURES ON THE PLANT PRODUCTIVITY: A CASE STUDY APPROACH Muhamad Hendrie Soesanto; Slamet Imam Wahyudi; M. Faiqun Niam
Jurnal Teknik Sipil dan Arsitektur Vol. 28 No. 2 (2023): JURNAL TEKNIK SIPIL DAN ARSITEKTUR
Publisher : Fakultas Teknik Universitas Tunas Pembangunan Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jtsa.v28i2.2582

Abstract

Irrigation System Performance Index (ISPI) is often used as a parameter in making decisions about the use of irrigation canals. The increase in rice production is dependent on a good condition of physical infrastructures, including the main building, the carrier canal and the buildings on the carrier canal. Performance assessment of Physical Infrastructure and Plant Productivity in Sungapan irrigation area of Pemalang Regency indicated that the physical infrastructure performance in 2012 - 2022 was 38.42%, increasing 3.22%. While the performance assessment of Plant Productivity was 14.96%, increasing 2.99%. Based on the multiple regression analysis using simultaneous test (F), the Physical Infrastructure component was indicated to influence the plant productivity. Meanwhile, based on the partial test (t), the physical infrastructure component partially did not have a significant influence on the plant productivity
FLY ASH AND SILICA FUME SUBSTITUTION ON COMPRESSIVE STRENGTH AND PERMEABILITY OF CONCRETE IN THE MARINE ENVIRONMENT Ignatius Sudarsono; S. Imam Wahyudi; Henny Pratiwi Adi
Jurnal Pensil : Pendidikan Teknik Sipil Vol 12 No 3 (2023): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v12i3.34971

Abstract

Cement, as a concrete-forming material, is a contributor to CO2 emissions in the world. Reducing cement and substituting fly ash and silica fume as concrete substitution materials in the manufacture of concrete makes green concrete without lowering the quality of the concrete. Concrete in the marine environment is frequently destroyed by severe environmental elements, such as seawater penetration; hence, high-performance concrete materials are required. This research aims to analyze the effect of adding fly ash and silica fume on concrete compressive strength and permeability. The specimens made were then immersed in freshwater and seawater. Analysis of the compressive strength test result shows that the compressive strength values ​​for the samples treated with freshwater or seawater have exceeded the expected compressive strength of 30 MPa. The permeability test on the test object resulted in the supplementary fly ash to the concrete immersed in freshwater having a good value, i.e., the water penetration was below that required by DIN-1045, namely 5 cm. The penetration of concrete with fly ash impressed in seawater is good only in concrete with a 10% fly ash variation. The water penetration value still meets the requirements in concrete with silica fume for all variations with freshwater and seawater treatment.
Penanganan Banjir Rob Kawasan Pesisir Pekalongan Mukhamad Afif Salim; SI Wahyudi; Kartono Wibowo
Jurnal Teknik Sipil Unaya Vol 9, No 2 (2023): Juli 2023
Publisher : Center for Research and Community Service (LPPM) University of Abulyatama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30601/jtsu.v9i2.4169

Abstract

Banjir terjadi akibat tingginya intensitas hujan  dan akibat air pasang yang menyebabkan kelumpuhan aktifitas perekonomian masyarakat pesisir, banjir menjadi permasalahan serius bagi stakeholder dan masyarakat pesisir Pekalongan. Tujuan penelitian ini untuk mengetahui penanganan banjir rob di pesisir Pekalongan. Metode penelitian dengan deskriptif kualitatif yang menggambarkan pemahaman dalam pengendalian dan penanganan banjir pesisir Pekalongan. Hasil penelitian penanganan banjir rob pesisir Pekalonan Sungai Bremi dilakukan dengan parapet dengan pemancangan Corrugated Concrete Sheet Pile  dengan ukuran 20x20 cm, kedalaman 4 m dengan timbunan tanah dipadatkan, penaganan Sungai Meduri dilakukan pembuatan tanggul tanah Mulyorejo dan dengan Corrugated Concrete Sheet Pile dengan kedalaman 12 meter dan elevasi puncak +3,50 m, (Sungai Silempeng- Sikarang dilakukan dengan tanggul tanah yang dipadatkan dan perkuatan tanah dari matras bambu dengan lebar atas 4 meter. Selain penanganan dengan parapet, tanggul, long storage, penanganan lain dilakukan dengan pembuatan pintu darurat di Desa Mulyorejo, Desa Jeruksari dan Tegaldowo sebagai desa terdampak paling parah akibat rob di Pekalongan
Asset Management and Performance of Information System-Based Irrigation System (EPAKSI) Case Study of Cabak Irrigation Area, Temanggung Regency Azis Hartanto; S. Imam Wahyudi; Soedarsono Soedarsono
Jurnal Indonesia Sosial Sains Vol. 5 No. 03 (2024): Jurnal Indonesia Sosial Sains
Publisher : CV. Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jiss.v5i03.1020

Abstract

The purpose of this study is to determine the process of data inputted and analyzed through the ePAKSI application, In this thesis used primary and secondary data collection methods. Secondary data as a support for primary data were obtained from the Office of the Public Works and Spatial Planning Office of Temanggung Regency and from the Office of the Food Security, Agriculture and Fisheries Office of Temanggung Regency. The results showed that the data inputted and analyzed with the ePAKSI application included data on asset types, asset names, nomenclature, dimensions and conditions ranging from assets upstream (weir) to downstream (end of the channel) of the Cabak irrigation network and the latest number of assets from field searches in the form of 3 channels, 34 buildings and 14 tertiary plots were known. The results of the evaluation of the performance assessment of the irrigation system of the Cabak Irrigation Area with the ePAKSI application obtained a total value of 63.70% in the less category (55% - 70%) with recommendations for handling needs attention from the Temanggung Regency Government. The details of the evaluation results of the performance assessment of the irrigation system of the Cabak Irrigation Area consist of physical infrastructure with a score of 59.81%, planting productivity 87.84%, supporting facilities 68.00%, personnel organization 71.20%, documentation 62.50% and water user farmer associations (GP3A / IP3A) 30.00%.
Analisis Faktor-Faktor Kerentanan Banjir Pesisir (Studi pada Pesisir Pantai Utara Jawa Tengah) Salim, M. Afif; Wahyudi, S. Imam; Wibowo, Kartono
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.847

Abstract

Flooding is a natural phenomenon that occurs in Indonesia, including the coastal areas of Pantura) which are complicated problems for the government that have not been fully handled properly. Pantura coastal flooding occurs due to rainwater flooding and tidal flooding, causing vulnerability. This study aims to determine the factors that cause vulnerability and determine the adaptation strategy for Pantura coastal flooding. This type of research is quantitative research because research is in the form of case studies based on descriptive assessments and the existence of quantitative data based on numbers and research is carried out by observation and data collection using data collection techniques and data analysis with SPSS Version 25.00 with 183 respondents. The research location is the coastal area of Pantura. Primary data collection method with questionnaires, interviews, observations, and documentation,. Based on the results of the study, the factors of coastal flood vulnerability are classified into physical vulnerability of buildings and infrastructure, biophysical and hydrological vulnerability, vulnerability of community capability and safety and flood vulnerability. The validity test of the vulnerability of coastal flooding shows all valid and reliable indicators because it has a validity value of > 0.300 and the reliability test value of the cronbrach alpha research instrument is above 0.700.