P D K Utami^[1]*, A W H Suharsono², D Harlan², M Farid², F I W Rohmat², E O Nuadagroho², A Mardiyono³

 

¹ Master’s Program in Water Resources Management, Faculty of Civil and Environmental Engineering, Bandung Institute of Technology, Jl. Ganesha 10 Bandung, Indonesia, 40132

²Water Resources Engineering Research Group, Study Program of Civil Engineering, Faculty of Civil and Environmental Engineering, Bandung Institute of Technology, Jl. Ganesha 10 Bandung, Indonesia 40132

³Public Company Jasa Tirta II, Jl. Lurah Kawi No. 1 Jatiluhur, Purwakarta, Jawa Barat 41152

[1]^* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol2.art20

 

ABSTRACT

West Java has three cascade reservoirs namely Saguling, Cirata, and Ir. H. Juanda (Jatiluhur). This research was conducted to describe water availability using the stochastic method (ARIMA with RStudio) and to simulate future reservoir operating guidelines. The operating guidelines used for these three reservoirs are based on the modified SNI Pd T-21-2004-A for three conditions, dry, normal, and wet. The 1974 – 2018 Nanjung Station historical discharge data are used. From the preliminary test results, the possible model is ARIMA (1,0,0) (1,0,1) (12) and obtained correlation value of 0.51 and NSE value of 0.084. Forecasting is done for the next 5 years. The equation = 6.4368 + 0.5593. −1 + 0.999. −12 + − 0.9723−12 is obtained and the results have not been able to describe the peak discharge. Dependable discharge is calculated for each condition. From the results of the calculation of the operating guidelines, there is a shortage in November 2020, but the available discharge is still sufficient for PJT II needs. The Jatiluhur Reservoir is hard to be full in June, so it is designed so that the reservoir will be closer to full in May. The water shortage in the calculation of the reservoir operating guidelines happens due to forecasted result that has not been able to describe the peak discharge. Although there are differences, in general the energy produced increases because the water elevation is maintained stable, and the discharge flow is not that different from data in the operating guidelines plan.

 

Keywords: Stochastic Model, Cascade, Reservoir

 

 

REFERENCES

Associated Consulting Engineering – ACE (PVT) LTD. 2015 Technical Report on Juanda (Jatiluhur) Reservoir Volume I – Sedimentation. Bandung: Kementerian PUPR BBWS Citarum

BBWS Citarum 2016 Rencana Pengelolaan Sumber Daya Air WS Citarum Bandung: BBWS Citarum

Departemen Permukiman dan Prasarana Wilayah 2004 Pedoman Konstruksi dan Bangunan: Pengoperasian Waduk Kaskade Berpola Listrik – Listrik – Multiguna. SNI Pd T-21-2004-A. Kementerian Permukiman dan Prasarana Wilayah.

Cita Citarum 2014 Kondisi Fisik dan Spasial Citarum.org

Mokoagow I 2012 Kajian Operasi Waduk Saguling. Bandung: Skripsi ITB

Nau R 2020 Statistical Forecasting: Notes on Regression and Time Series Analysis California Duke University

Pusat Pendidikan dan Pelatihan Sumber Daya Air dan Konstruksi 2017 Modul Operasi Waduk.Bandung Kementerian Pekerjaan Umum dan Perumahan Rakyat

Pusat Pendidikan dan Pelatihan Sumber Daya Air dan Konstruksi Pelatihan Alokasi Air  Operasi Waduk Kementerian Pekerjaan Umum dan Perumahan Rakyat

Pemerintah Provinsi Jawa Barat 2019 RPMJD Jawa Barat 2018 – 2023 Peraturan Daerah Provinsi Jawa Barat Nomor 8 Tahun 2019 Bandung Jawa Barat

Shmueli G and Junior KCL 2016 Practical Time Series Forecasting With R, A Hands-On Guide. Bhutan Axelrod Schnall Publishers

Soeharno A 1992 Simulation of Hydropower Generation for The Citarum Multi-Reservoir System Using Synthetic Flows Graduated Thesis St. John’s Memorial University of Newfoundland

Tempo.co 2019 Operasi Hujan Buatan Isi Cadangan Air Waduk Kaskade Citarum Tempo Tekno

Wei WW 2006 2nd. Time Series Analysis: Univariate and Multivariate Methods (Second Edition). Boston: Pearson.

Wellyanti, B 2019 Peramalan Produk Domestik Regional Bruto (PDRB) Provinsi Bali Triwulan (Q-to-Q) Tahun Dasar 2010 dengan Model ARIMA Ekonomi Kuantitatif Terapan 63 – 72.

E Wardhani^[1]*, M R Pratama¹

 

¹ Environmental Engineering Study Program, Faculty of Civil Engineering and Planning, National Institute of Technology, Bandung, Indonesia

[1]^* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol2.art18

 

ABSTRACT

Cimanuk River water is the main raw water source in West Java Province. The quality of the water must be maintained so that it can be useful in the long term. Cimanuk River water is planned to be a source of raw water for clean water services in the West Java Region. Based on this, it is necessary to know the quality of this river water. This study aims to calculate the water and sediment pollution index considering that there is a strong relationship between the water column and sediment in the river. The research method uses the Pollution Index method to determine the water pollution index and the Contamination Factor and Metal Pollution Index to assess the quality of sediment due to heavy metal pollution. . There are 6 (six) parameters that do not meet the quality standards, namely: BOD₅, COD, Total Ammonia (NH₃-N), Sulfur as H₂S, Free Chlorine (Cl₂), and Copper (Cu). Sources of pollution are predicted to come from domestic and agricultural activities in the Cimanuk river basin. The results of the analysis of sediment quality using the Contamination Factor method showed that the sediment of the Cimanuk River was polluted with heavy metals Cadmium and Copper with a very high category. Based on the results of calculations using the Metal Pollution Index method, it was concluded that the sediment of the Cimanuk River was polluted with heavy metals.

 

Keywords: Cimanjuk, River, Sediment, Water, Quality

 

REFERENCES

Detail Engineering Report Cimanuk Raw Water System Balai Besar Wilayah Sungai Cimanuk Cisanggarung

Wardhani, E., Primalaksono, Y. (2022). Pollutant Index Method in Determining the Water Quality Status of the Cimahi River in West Bandung Regency. IOP Conference Series: Earth and Environmental Sciencethis link is disabled, 2022, 999(1), 012025

Dhanakumar S, G. Solaraj, R. Mohanraj. (2015): Heavy metal partitioning in sediments and bioaccumulation in commercial fish species of thre emajor reservoirs of river Cauvery delta region, India, Ecotoxicology and Environmental Safety, 113:145-151.

Eka, W., Suprihanto, N., Dwina, R. (2018) Assessment of Heavy Metal Contamination in Saguling Reservoir Water West Java Province Indonesia. E3S Web of Conferences, 2018, 73, 06009

Zahra A, Hashmi M.Z, Malik R.N, Ahmed Z. (2013): Enrichment and geo-accumulation of heavymetals and risk assessment of sediments of the Kurang Nallah-feeding tributary ofthe Rawal Lake Reservoir, Pakistan. Sci Total Environ, 470-471C:925-33.

Wardhani, E., Roosmini, D., Notodarmojo, S. (2021). Calculation of heavy metals pollution load enters to Saguling dam West Java Province. IOP Conference Series: Earth and Environmental Sciencethis link is disabled, 2021, 802(1), 012032

Keputusan Menteri Lingungan Hidup Nomor 115 Tahun 2003 tentang pedoman penentuan status mutu air dengan metode indeks pencemaran

Sayadi M.H, Rezaei M.R, Rezaei A. (2015) Sediment toxicity and ecological risk of trace metals from streams surrounding a municipal solid waste landfill. Bull Environ Contam Toxicol.

Sekabira K, H. Oryem Origa, T. A Basamba, G. Mutumba, E. Kakudidi. (2010): Assessment of heavy metal pollution in the urban stream sediment and its tributaries, International Journal Environment Science and Technology., 7 (3) 435-446 Summer.

2009. S. Huboyo, W. D. Nugraha, and R. Indah, “Analisis Penentuan Mutu Air Beberapa Sungai Di Jawa Tengah Dengan Metode Storet Dan Indeks Pencemaran,” Jurnal Presipitasi: Media Komunikasi dan Pengembangan Teknik Lingkungan, vol. 6, no. 2, pp. 1-6, Sep. 2009.

Standar nasional Indonesia Nomor 6989.57-2008 tentang air dan air limbah-bagian 57: metoda pengambilan contoh air permukaan.

Peraturan Pemerintah Republik Indonesia No. 22 Tahun 2021 Tentang Penyelenggaraan Perlindungan dan Pengelolaan Lingkungan Hidup Lampiran VI.

Standar Nasional Indonesia No 8520:2018 tentang tata cara pengambilan contoh uji limbah bahan beracun dan berbahaya fase padat

Peraturan Pemerintah No. 101 Tahun 2014 Tentang Pengelolaan Limbah Bahan Berbahaya dan Beracun

Thomilson, D. C.; Wilson, D. J.; Harris, C. R.; Jeffrey, D. W., (1980): Problem in assessment of heavy metals in estuaries and the formation of pollution index, Helgol. Wiss. Meeresunlter, 33(1-4), 566-575.

Sakan Sanja, Devic Gordana, Relic Dubravka, Aldenovic Ivan, Sakan Nenad, Dordevic Dragana. (2015): Evaluation of sediment contamination with heavy metals: the importance of determining appropriate background content and suitable element for normalization. Environ Geochem Health 37: 97-113

Wardhani, E., Notodarmojo, S., Roosmini, D. (2018). Stream Sediment Geochemical Survey of Selected Element in Catchment Area of Saguling Lake. MATEC Web of Conferences, 2018, 147, 08003

Machairiyah Machairiyah, Zulkifli Nasution, Bejo Slamet (2020) Pengaruh Pemanfaatan Lahan Terhadap Kualitas Air Sungai Percut Dengan Metode Indeks Pencemaran (IP). Limnotek Perairan Darat Tropis di Indonesia Vol 27, No 1 (2020)

Yuniarti Yuniarti, Danang Biyatmoko (2019) Analisis Kualitas Air Dengan Penentuan Status Mutu Air Sungai Jaing Kabupaten Tabalong. Jukung Jurnal Teknik Lingkungan Vol 5, No 2 (2019)

Bambang Rahadi Widiatmono, Bambang Suharto, Florensia Yuke Monica (2019) Identifikasi Daya Tampung Beban Pencemar dan Kualitas Air Sungai Lesti Sebelum Pembangunan Hotel. Jurnal Sumberdaya Alam dan Lingkungan Vol 6, No 3 (2019)

Australian and New Zealand Environment and Conservation Council (ANZECC). (1997): ANZECC Sediment Quality Guidelines. Report for the Environmental Research Institute of the Supervising Scientist. Sydney, Australia: AZECC ISQG-Low.

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Sen Memet Varol dan Bulent Sen, (2012): Assessment of nutrient and heavy metal contamination in surface water and sediment of the upper Tigris River, Turkey, Catena 92.

A Suryaningrum^[1]*,3, C Utomo¹, E Santoso²

 

¹ Department of Civil Engineering, Institut Teknologi Sepuluh Nopember, Indonesia

² Department of Urban Regional Planning Engineering, Institut Teknologi Sepuluh Nopember, Indonesia

³ Study Program of Civil Engineering, Universitas Bhayangkara, Surabaya

[1]^* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol2.art16

 

ABSTRACT

Public Private Partnership (PPP) needs to be developed, related to the construction of infrastructure projects that require large costs incurred by the government. One of the important variables in preparing PPP contracts is to determine the concession period by taking into account the risks and uncertainties that occur during the concession period. The purpose of the study is to find out the research methods used related to the concession period by analyzing 30 papers related to the concession period. In the collection of research data, there are quantitative and qualitative approaches. The methods used in each study use different methods, based on the analysis of research methods from 30 papers. In the topic of discussion of the concession period, in general, the paper discusses the type of modeling, decision criteria, solutions, cases, research objects, risks and uncertainties and methods used. Previous studies related to the concession period have many different methods and objectives, In quadrant mapping shows that the use of quantitative methods with secondary data is the most dominant. Based on the reviews that have been carried out in this study, it can be concluded that the use of quantitative methods with secondary data is the most dominant.

 

Keywords: Public private partnership, research methods, concession period

 

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A V R Sihombing^[1]*, R Utami¹, A K Soemantri¹, A Febriansya¹, and R P Sihombing²

 

¹ Department of Civil Engineering, Politeknik Negeri Bandung, Jln.Gegerkalong Hilir, Ciwaruga, Bandung, Indonesia

²Department of Architecture, Institut Teknologi Nasional Bandung, Jl. PH.H. Mustofa No.23, Bandung, Indonesia

[1]^* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol2.art14

 

ABSTRACT

Glycerine pitch (GP) is a by-product from the refining process of Crude Glycerol from the palm oleochemical industry which in its processing requires a cost of USD 400/ton. In Indonesia, it is estimated that the production of GP reaches 35 thousand tons/year. This study aims to examine the potential of GP as an extender for asphalt binder pen 60/70, according to the Fourier transform infrared spectroscopy (FTIR) test to see its chemical structure and asphalt binder rheology in the laboratory. The materials used in this research are pen 60/70 and GP from the oil palm oleochemical industry in Bekasi Regency which are produced from the hydrolysis route. GP was added to asphalt pen 60/70 with variations in the percentage of GP to the weight of asphalt pen 60/70 were 0%, 15%, 20%, and 25%. Based on the results of the FTIR test, it is known that GP belongs to a polyglycerol compound which is similar to the long compound in petroleum asphalt. The addition of GP up to 25% to asphalt-based rheology still meets the characteristics of pen 60/70 with a penetration value of 64.14 dmm, softening point 52 C, viscosity 408.52 cSt, ductility > 100 cm and density 1.061.

 

Keywords : Glycherine Pitch; Ashpalt; FITR

 

REFERENCES

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W. P. Teoh, S. Y. Chee, N. Z. Habib, M. J. K. Bashir, V. S. Chok, and C. A. Ng, (2021), “Chemical investigation and process optimization of glycerine pitch in the green production of roofing tiles,” J. Build. Eng., vol. 43, no. January, p. 102869, : 10.1016/j.jobe.2021.102869.
E. N. Hidawati and a M. M. Sakinah, (2011), “Treatment of Glycerin Pitch from Biodiesel Production,” Int. J. Chem. Environ. Eng., vol. 2, no. 5, pp. 309–313.
A H. Hazimah, T. L. Ooi, and a Salmiah, (2003), “Recovery of Glycerol and Diglycerol From Glycerol Pitch Recovery of Glycerol and Diglycerol From Glycerol Pitch,” J. Oil Palm Res., vol. 15, no. 1, pp. 1–5.
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B. Y. Tong Jian, (2019), “Utilization of Glycerine Pitch As a Binder in the Production of Green Roofing Tile,” p. 89.
I. Sumantoro, “Impor Aspal Indonesia,” Indonesiana, (2022), [Online]. Available: https://www.indonesiana.id/read/157758/impor-aspal-indonesia#:~:text=Di tahun 2021%2C Indonesia telah,atau senilai US%24 550 juta. [Accessed: 29-Aug-2022].
S. Tang, (2010), “Asphalt modification by utilizing bio-oil ESP and tall oil additive”.
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ASTM D36, (2014), Standard Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus). West Conshohocken, PA: ASTM International.
ASTM D5-05, (2005), Standard Test Method for Penetration of Bituminous Materials. West Conshohocken, PA: ASTM International.
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D A Dayani^1,2, W Wilopo^1*, I Azwartika²

 

¹Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University, Yogyakarta 55281, Indonesia

²Ministry of Public Works and Housing, Indonesia

 

[1]^* Corresponding author’s email:  [email protected]

DOI: https://doi.org/10.20885/icsbe.vol2.art12

 

ABSTRACT

Groundwater is one water source to meet the needs of humans, animals, and plants. The groundwater potential of an area is usually difficult to determine because it is below the ^[1]surface. The Indonesian government has a program to develop a food estate in Central Sumba Regency; however, the availability of surface irrigation water is limited. Therefore, the assessment of groundwater potential was conducted. In this study, the evaluation of groundwater potential was carried out using geophysical methods and a hydrogeological survey. The resistivity of subsurface rocks was measured in 20 VES points by Schlumberger configuration. The area of the food estate in Central Sumba is mainly composed of limestone that forms a karst landscape. The groundwater level from the existing well is around 2-16 meters from the surface. The potential of rock as an aquifer is limestone with a resistivity value between 34 -7013 Ωm. There are two types of aquifers in the study area: unconfined and confined aquifers. Unconfined aquifers are found at a depth of 2-7 meters, while confined aquifers are found at depths of 11-120 meters. The distribution of aquifers is more in the western part of the study area.

 

Keywords : Geolectrical Methods; Groundwater; Food Estate

 

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