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All Journal Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa
Arthur Haris Thambas
Program Studi Teknik Sipil, Universitas Sam Ratulangi, Manado, Sulawesi Utara, Indonesia
Civil Engineering, Building, Construction & Architecture Environmental Science

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Manajemen risiko pada sistem penyediaan air minum (SPAM) perpipaan dengan metode failure mode and effect analysis dan fault tree analysis di Kabupaten Minahasa Utara Stania Ekarista Bitty; Liany Amelia Hendratta; Arthur Haris Thambas; Grace Malingkas
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa 138-147
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.13.2.10108.138-147

Abstract

The construction of a piped Drinking Water Supply System in North Minahasa Regency is very much needed to meet the community's access to drinking water needs. Apart from planning and implementing SPAM construction to achieve quality and sustainable drinking water services, a risk management process is also needed to reduce and anticipate system failures. Through this research, failures and risks in the SPAM development process in North Minahasa Regency can be analyzed using appropriate risk management methods. This is to ensure the sustainability and reliability of SPAM for the communities served. To obtain the data needed in this research, researchers conducted brainstorming, direct observations in the field, interviews with parties involved in SPAM development, and filled out questionnaires. The data obtained is then analyzed using the risk management process, starting from the stages of risk identification, risk assessment, risk management, and implementation of risk management. From the results of the risk assessment using the Failure Mode and Effect Analysis (FMEA) method and the Fault Tree Analysis (FTA) method, 85 risks were identified. In the technical planning for SPAM implementation there are 19 risks, raw water units 28 risks, production units 19 risks, distribution units 12 risks, and service units 7 risks. Each SPAM component is taken for potential risk by calculating the highest RPN value, namely 324.76, for the risk of workers not using K3 equipment. Using the fault tree in the FTA method, we get 13 basic events for the risk of delays in work implementation, 11 basic events for the risk of workers not using K3 equipment, 12 basic events for construction implementation that does not follow implementation methods and plan drawings, 12 basic events for the risk of pipe leaks, and 12 basic events for water use that are not recorded by the water meter. The risk management process for piping SPAM in this research can be a reference framework for implementing further SPAM development.
Pengaruh aliran sungai panasen terhadap proses sedimentasi di Danau Tondano Liany Amelia Hendratta; Arthur Haris Thambas; Lusia Manu; La’la Monica
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa 131-137
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.13.2.10720.131-137

Abstract

Land use changes and inappropriate land use in the Panasen watershed cause sedimentation in Lake Tondano. The influence of sediment-laden flow on the sedimentation process is still a problem that needs to be studied. The occurrence of flooding in the downstream part of the river due to the process of river silting is a problem that has an impact on economic losses, environmental problems and even unresolved social conflicts. This study aims to obtain the factors causing flooding by evaluating the capacity of the Panasen river cross-section in the downstream part and analyzing the influence of the Panasen River sediment flow on the sedimentation process in Lake Tondano. The study was conducted through field observations in the form of river geometry measurements and sediment flow sampling. Secondary data, namely topographic maps, rainfall data and measured discharge data were obtained from related agencies. Various analyses carried out were hydrological analysis, hydraulic analysis and sedimentation analysis. The hydrological analysis used maximum daily rainfall data obtained from the Noongan rainfall station and measured river discharge from the Noongan River AWLR. The magnitude of flood discharge using the HEC-HMS model with calibrated parameters for various return periods of 2, 5, 10, 25, 50 and 100 years were obtained at 50.2 m3/sec, 71.6 m3/sec, 82.1 m3/sec, 91.8 m3/sec, 97.2 m3/sec and 101.4 m3/sec. From the hydraulic analysis, it was obtained that under Q100 and lake tides, all river segments were unable to accommodate flood discharge. The flood water level (overflow) was at 1.2 - 3.1 meters and tended to occur towards the right river bank. The amount of sediment transport was determined after obtaining the dissolved sediment content, which was 6.16 gr/m3, resulted in an average increase in sediment volume to the lake for 30 years of 3,215,104.7 m³ or a thickness of 72.15 mm. The results of the study showed that the amount of sediment entering the lake was quite large, so that management efforts were needed in the Panasen River watershed, namely in the form of land conservation measures and determining appropriate land use.
Co-Authors Grace Malingkas La’la Monica Liany Amelia Hendratta Lusia Manu Stania Ekarista Bitty