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JURNAL TEKNIK HIDRAULIK
ISSN : 20873611     EISSN : 25808087     DOI : -
Core Subject : Engineering,
The Hydraulic Engineering Journal covers a variety of scientific fields including Irrigation Engineering, Environmental quality and water management Engineering, Swamp Engineering, Beach Engineering, Water building Engineering, Harvesting Engineering, Water hydraulics and geotechnical Engineering, Hydrology and water management Engineering, Water environmental engineering, Beach Engineering, Harvesting Engineering, Sabo Engineering.
Arjuna Subject : -
Articles 156 Documents
Pemodelan Intrusi Air Asin Pada Akuifer Pantai (Studi Kasus: DKI Jakarta) Alan Wijaya; Arno Adi Kuntoro; Edy Anto Soentoro Gondodinoto
JURNAL TEKNIK HIDRAULIK Vol 10, No 1 (2019): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1508.061 KB) | DOI: 10.32679/jth.v10i1.583

Abstract

Main issues frequently faced by communities living in the city of Jakarta is salt water intrusion. This paper analyzes the extent of the distribution of saltwater contamination to coastal aquifers in Jakarta, the method used is the open source program FREEWAT. modeling is carried out in five scenarios, namely (1) reduction of 50% of groundwater use, (2) reduction of 25% of groundwater use, (3) existing groundwater use in 2012, (4) increase of 25% of groundwater use, and (5) increase of 50% of groundwater use. From the modeling results, the distribution of saltwater contamination on each layer of the aquifer of Jakarta. In unconfined aquifer the existing condition is scenario 3 intrusion as far as 1.604 m, on scenario 1 there is an intrusion decrease of 38%, in scenario 2 there is an intrusion decrease of 13%, in scenario 4 there is an increase in intrusion by 17% and on scenario 5 increase intrusion by 25%. In upper confined aquifer, the existing condition, namely scenario 3, has occurred as much as 1.809 m intrusion, in scenario 1 there is an intrusion decrease of 23%, in scenario 2 there is an intrusion decrease of 8%, in scenario 4 there is an increase in intrusion by 19% and in scenario 5 increase intrusion by 26%. In middle confined aquifer, the existing condition is scenario 3, 1.927 m intrusion occurs, on the scenario 1 there is an intrusion decrease of 23%, in scenario 2 there is an intrusion decrease of 9%, in scenario 4 there is an increase in intrusion by 16% and in the scenario 5 increase intrusion by 22%.
Analisa Perhitungan Muka Air Rata-Rata Di Lahan Gambut Dengan Tanggul Keliling Dalam Rangka Mengurangi Kebakaran Indra Setya Putra; Yudi Lasmana
JURNAL TEKNIK HIDRAULIK Vol 10, No 1 (2019): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v10i1.601

Abstract

Peatland fires encourage the government to restore peat function as natural water storage. One of the measures taken is to build a circumference dike to hold water to reduce excessive drainage. However, there is no study yet of the planned average water level that has to be maintained from the construction of circumference dike. Therefore, the aim of this study is to calculate the average water level on peatlands inside the circumference dike. The methods used consist of hydrological analysis, spatial analysis, and water level analysis. The results of the analysis shows that the average water level in normal years tends to be above the surface, except in the second half of August to the first half of November. In the second half of September to the second half of October, the peat has the potential to be burned. In a dry season the water tends to fall decline to the drainage boundary of peatland which is at -1.5 m which occurs in the second half of March to December. In the second half of February until December peatland has potential to be burned. From this research, it can be concluded that the calculations using this method is similar with in-situ observation data and can be used to calculate the average water level of peat with the same conditions in other locations.
Respon Hidraulik Dan Stabilitas Lapis Armor Pada Desain Awal Tanggul Laut Lepas Pantai NCICD Rian Mohammad Azhar; Agustia Larasari; Semeidi Husrin; Huda Bachtiar
JURNAL TEKNIK HIDRAULIK Vol 10, No 1 (2019): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1121.472 KB) | DOI: 10.32679/jth.v10i1.603

Abstract

Main issues frequently faced by communities living in the city of Jakarta is salt water intrusion. This paper analyzes the extent of the distribution of saltwater contamination to coastal aquifers in Jakarta, the method used is the open source program FREEWAT. modeling is carried out in five scenarios, namely (1) reduction of 50% of groundwater use, (2) reduction of 25% of groundwater use, (3) existing groundwater use in 2012, (4) increase of 25% of groundwater use, and (5) increase of 50% of groundwater use. From the modeling results, the distribution of saltwater contamination on each layer of the aquifer of Jakarta. In unconfined aquifer the existing condition is scenario 3 intrusion as far as 1.604 m, on scenario 1 there is an intrusion decrease of 38%, in scenario 2 there is an intrusion decrease of 13%, in scenario 4 there is an increase in intrusion by 17% and on scenario 5 increase intrusion by 25%. In upper confined aquifer, the existing condition, namely scenario 3, has occurred as much as 1.809 m intrusion, in scenario 1 there is an intrusion decrease of 23%, in scenario 2 there is an intrusion decrease of 8%, in scenario 4 there is an increase in intrusion by 19% and in scenario 5 increase intrusion by 26%. In middle confined aquifer, the existing condition is scenario 3, 1.927 m intrusion occurs, on the scenario 1 there is an intrusion decrease of 23%, in scenario 2 there is an intrusion decrease of 9%, in scenario 4 there is an increase in intrusion by 16% and in the scenario 5 increase intrusion by 22%.
Modelling Wave Dissipation on Pile Breakwater Using Xbeach Eduardo Meyrianso Simanjuntak; Leo Eliasta; Juventus Welly Ginting; Ida Ayu Irawati Diah Ratna Putra
JURNAL TEKNIK HIDRAULIK Vol 10, No 1 (2019): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (721.091 KB) | DOI: 10.32679/jth.v10i1.605

Abstract

Pile breakwater is an alternative coastal structure to prevent coastal erosion considering the economic and technical aspect. An improved design for pile breakwater is proposed here. Our goal is to develop an assessment tool in planning the implementation of pile breakwater. This tool is based on numerical model that has been verified with physical model result. The wave spectrum show that the numerical model is able to simulate the wave as same as the physical model with overestimation. It also points out that the simulation with wave period (T) = 2.5 s has more significant noise than the simulation with wave period (T) = 2 s. In general, the numerical model has high accuracy for predicting incident wave height (Hi), transmitted wave height (Ht) and transmission coefficient (KT) with error below 1 % RMSE. Xbeach is also able to simulate pile breakwater with high accuracy especially for two or three row arrangement with width gap 0.3 m. Even so, the numerical model have limitation regarding wave phase and wave through irregularity. Pile breakwater is an alternative coastal structure to prevent coastal erosion considering the economic and technical aspect. An improved design for pile breakwater is proposed here. Our goal is to develop an assessment tool in planning the implementation of pile breakwater. This tool is based on numerical model that has been verified with physical model result. The wave spectrum show that the numerical model is able to simulate the wave as same as the physical model with overestimation. It also points out that the simulation with wave period (T) = 2.5 s has more significant noise than the simulation with wave period (T) = 2 s. In general, the numerical model has high accuracy for predicting incident wave height (Hi), transmitted wave height (Ht) and transmission coefficient (KT) with error below 1 % RMSE. Xbeach is also able to simulate pile breakwater with high accuracy especially for two or three row arrangement with width gap 0.3 m. Even so, the numerical model have limitation regarding wave phase and wave through irregularity. 
Model Fisik Redaman Energi Gelombang Dengan Breakwater Tiang Juventus Welly Ginting; Ida Ayu Irawati Diah Ratna Putra; Eduardo Meyrianso Simanjuntak
JURNAL TEKNIK HIDRAULIK Vol 10, No 1 (2019): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1892.234 KB) | DOI: 10.32679/jth.v10i1.606

Abstract

Breakwaters is one of type coastal structure that is mainly used as part for coastal protection purposes. Among the various types of breakwaters, likely rigid and hollow vertical pole types are one of the alternative structures for coastal protection. The utilization of this structure usually in the port area or in marina which protrudes into the sea. The pile breakwater test was carried out at laboratory experimental station for coastal engineering Buleleng Bali, on a scale of 1:10. This trial was carried out using pile materials using PVC pipes with a diameter of 6 cm. Scaling of this model is based on the piles used in the project sea dike stage A-NCICD. In testing this physical model several variations were carried out such as tata letak variation (N), wave height (h), wave period (t), distance between piles (columns) relative to diameter (B/D), and distance between piles (row) relative to diameter (b / D). Based on the test results obtained the optimal stacking configuration to reduce wave energy is a configuration with pole configuration B / D = 1; b / D = 0.5
Potensi Air Tanah Di Wilayah Pengungsian Erupsi Gunung Agung Bali Yan Adhitya Wesda Wardhana; Isnan Fauzan; Heni Rengganis
JURNAL TEKNIK HIDRAULIK Vol 10, No 2 (2019): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v10i2.602

Abstract

Gunung Agung is a stratovolcano type of volcano which has a height of 3,142 masl and is located in Karangasem Regency, Bali Province. At the end of 2017, Mount Agung's volcanic activity increased until it finally erupted several times in October to December. The government has prepared refuge pockets at the foot of Mount Agung, in areas that are not directly affected by eruption. There are 19 drilling plan points that will be carried out to meet the raw water needs at the evacuation site. This paper presents the groundwater recharge potential including the distribution of water sources, Hydrogeological conditions and the magnitude of groundwater recharge potential at hillside of Mount Agung and the surrounding area. The method used in this study is a field survey, calculation of potential recharge, analysis and evaluation of hydrogeological conditions, distribution of water sources and calculation of potential groundwater recharge. Groundwater at the foot of Mount Agung has the potential to be utilized and developed mainly to cover raw water needs in several refugee locations, namely in the Districts of Sidemen, Abang and Karangasem. The result of the analysis is that the largest groundwater potential is in Kubu Sub-District, namely 97,560,207 m3 / year, with a position that is relatively susceptible to primary hazards and secondary to Mount Agung eruption. For locations that are relatively safe and reachable in the area, they are in Tianyar, Sukadana, Baturinggit, Kubu, and Tulamben Villages, all of which are on the coast of the sea. These results are expected to be used by local governments in an effort to deal with the provision of water from the impact of the eruption of Mount Agung.
Aplikasi Susunan Pemecah Gelombang Tiang Pancang Bercelah Dalam Menentukan Transmisi Gelombang Ida Ayu Irawati Diah Ratna Putra; Juventus Welly R Ginting; Eduardo Meyrianso Simanjuntak
JURNAL TEKNIK HIDRAULIK Vol 10, No 2 (2019): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v10i2.607

Abstract

Pile breakwater is an effective type of breakwater to reduce wave energy. To find out the effectiveness of the structure of the pile breakwater can be carried out physical modeling experiments in the laboratory. The structure is tested based on the variation of gap between piles (rows)/Diameter (b/D), distance between piles (columns) / Diameter (B/D), arrangement of laying piles (N), and gap width between pile groups stake (G). Besides structure, period (T) and wave height (H) are also varied. This physical model test is carried out in a fume with regular wave at a depth of 60 cm. From the results of physical modeling it can be seen the value of the transmission coefficient (Kt) which is determined based on variations in the gap structure between the piles (rows) /Diameter (b/D), the arrangement of laying piles (N), and the width of the gap between the pile groups (G) which is used as a reference to determine the effectiveness of the pile breakwater structure. Physical modelling of the pile is the optimum value of the transmission coefficient (Kt) to reduce the waveform shown in the variation of the structure of the distance between the pile rows (b/D) 0.5, 58.1 cm Gap, and configuration of the pile structure N2 (three rows pile breakwater).Key Word: Breakwater, Pile Breakwater Structure, Transmission Coefficient (Kt)
Efektivitas Dan Kelengkapan Bangunan Sabo Di Sungai Togurara Daerah Gunungapi Gamalama Ardian Alfianto; Jati Iswardoyo; cosmas bambang sukatja
JURNAL TEKNIK HIDRAULIK Vol 10, No 2 (2019): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v10i2.608

Abstract

The lahar flow  that occurred after the 2012  Gamalama Volcano  eruption, leading to the eastern valley flowing downstream  through the Togurara River to the center of Ternate City and Sultan Babullah Airport. To overcome the potential of  lahar  flow in the river since 2013 - 2016, several sabo dams and building facilities have been built. Based on the results of the calculation of deposits that potentially become lahar flows in 2016, the built-in capacity of the Sabodam has not been able to control the volume of sediment in the upstream of the river, then in the year 2017, 2018 constructed several additional Sabodam.  In order to determine the effectiveness, feasibility and conditions of the completeness of Sabodam, is done field assessment on 25 ~ 27 September 2018, the method used was a mathematical approach based on sabo technology. The assessment was in the form of a field survey, simple measurements, interviews with the Sabodam management agency and local residents related to the lahar flow that had occurred. With the capacity of several additional Sabodams built in series, the average river bed slope was originally 9.09% to 6.83%. After the construction of Sabodam, the maximum lahar flow was once as high as 7 m, but now it decreases do 4.2 m.   As the slope of the Togurara River slopes progressively, the lahar flow rate and its destructive power are reduced, so that Ternate City and Sultan Babullah Airport are spared from lahar disaster.Keywords: Lahar flow, sabodam, sabo technology, slope of riverbed, Togurara River.
Beban Gelombang Pada Tiang Pancang Penahan Ponton Yang Diletakan Di Depan Dinding Vertikal Irham Adrie Hakiki; Vilda Ariviana; Ika Nur Afifah; Leo Eliasta Sembiring
JURNAL TEKNIK HIDRAULIK Vol 10, No 2 (2019): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v10i2.615

Abstract

Experimental Station for Coastal  developed a pilot project of modular concrete floating structure that served as a quay at Kalibaru in North Jakarta. The structure guided by piles and placed in front of Jakarta Coastal Dyke which is a vertical wall structure. From evaluating the structure performance, it is found that the strength of the pile is an important factor for service life of the structure. To provide this, a physical model test of the floating pontoon module guided by piles was conducted at the Laboratory of Balai Litbang Pantai. The model used to determine the behavior of the structure and loads that must be hold by the pile as a seakeeping mechanism. It is done by measuring force acting on piles that caused by pontoon impact by using load cells. The pontoon loaded by regular and irregular waves. From the tests result, the recorded forces has an impuls pattern which have maximum value of 112.67 N. The load that occurs on the pile was not spread evenly on the four piles that hold the floating module. The disrepancy are around 2 – 40%.   The forces acting on piles depends on the ponton distance to the vertical wall. The forces increases along with the increases of relative distances of structure to vertical wall  to the wavelength. The presence of vertical vall caused this increase because it amplify the waves acting on the structure. The amplification effect are the greatest when the structure distrance from the wall is the multiplication factor of halves of wavelength.Keywords : physical model test, pontoon, floating quay, pile guide, impact force
Hubungan Antara Elevasi Muka Air Waduk Dan Panjang Lintasan Rembesan Terhadap Debit Rembesan Pada Bendungan Urugan Batu Inti Tegak (Studi Kasus Bendungan Jatibarang) Siswanto Siswanto; Suprapto Suprapto; Sri Sangkawati Sachro
JURNAL TEKNIK HIDRAULIK Vol 10, No 2 (2019): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v10i2.628

Abstract

Rockfill dams have better stability than homogeneous soil dams. It allows to design the dam more slim with a higher slope. The disadvantage of rockfill dam is in the core zone as an impermeable zone. Zoned vertical core rockfill dam is a combination of various material properties. Geometry and drainage design will affect the seepage and phreatic line properties that occur. Numerical modeling and calculations are used to calculate the seepage profile more accurately. The combination of the parameters of the permeability coefficient (K), reservoir water level (Δh) and the length of the seepage path (L) can be used to determine the relationship between parameters with the same unit. 2D modeling take into account saturated/unsaturated conditions with steady state on each parameter. This study uses the Jatibarang-Indonesia dam as a basic model. The seepage profile at condition K1 (k = 1x10-5cm/sec) is q/k = -0.0018 (h2/L)2 + 1.3496h2/L + 53.241 and the seepage profile K2 (k=1x10-7cm/s) is q/k = -0.1521 (h2/L)2 + 90.402h2/L + 5480.2. This equations can be used to estimate seepage that occurs in a dam of other rock fill zoned vertical core dam based on the permeability coefficient value (K) more practically for all values of Δh and L reviewed.Keywords: Seepage, Rockfill Dam, Permeability, FEM, Numerical Analysis

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