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Papers by Searphin Nugroho

Trends in Sciences

Mahakam is the second longest river in Indonesia and it functions as a source of raw water for dr... more Mahakam is the second longest river in Indonesia and it functions as a source of raw water for drinking and other essential activities for the Samarinda people. Furthermore activities in the watershed generate solid waste such as plastic, which enters the waters and is potentially degraded into microplastics. There is a possibility that the presence of microplastics is affected by anthropogenic types along the river. Therefore, this research aims to determine the effect of anthropogenic type and river depth on the microplastic abundance in the Mahakam River. The samples were taken using an integrated approach at 3 depths, namely 0.5, 1, and 1.5 m, in 2 locations with different anthropogenic types. The sampling points include Kampung Tenun and Bukuan Villages, which represented densely populated and non-populated areas, respectively. The water collected was prepared with the following steps, which include filtration with 180 μm nylon, elimination of organic matter, density separator,...

TEKNIK

Distribusi air di Kota Samarinda masih belum optimal dikarenakan factor tekanan air di dalam pipa... more Distribusi air di Kota Samarinda masih belum optimal dikarenakan factor tekanan air di dalam pipa yang rendah pada waktu tertentu dan kehilangan air fisik karena kebocoran. Artikel ini memuat analisis jaringan perpipaan distribusi air bersih di Kelurahan Harapan Baru, Kota Samarinda menggunakan perangkat lunak EPANET 2.0. Hasil simulasi dibandingkan dengan hasil pengukuran tekanan air di lapangan pada kran pelanggan menggunakan manometer. Dari hasil penelitian, diketahui terdapat sebanyak 7 junction yang nilai tekanan airnya di bawah batas minimum kriteria pipa distribusi dari Peraturan Menteri Pekerjaan Umum No.18/PRT/M/2007 sebesar 0,5 atm, serta sebanyak 11 pipa yang nilai kecepatan aliran airnya di bawah batas minimum kriteria yang sama sebesar 0,3 m/s. Rekomendasi perbaikan jaringan perpipaan distribusi air bersih berupa tekanan minimum sebesar 0,5 bar pada pelanggan dan kontinuitas, yakni perubahan pengaturan tekanan pada valve existing, dan penambahan pompa booster pada beber...

IPTEK Journal of Proceedings Series

The application of bio-pore infiltration holes (BIH) can be one solution for urban runoff managem... more The application of bio-pore infiltration holes (BIH) can be one solution for urban runoff management by reducing surface runoff to the ground. But, the difference in soil types and characteristics could affect the runoff reduction that can be achieved by BIH. This research aims to determine the runoff reduction can be achieved by bio-pore infiltration hole (BIH) from different soil types and conditions. The methods in this study mainly focus on hydraulic conductivity calculations using Porchet method and the implementation of Minister of Environment Regulation Numb. 12/2009 for the BIH installations. Based on the implementation of Minister of Environment Regulation Numb. 12/2009, the required BIHs for the area of 500 m2 are 1,000, both for silt and clay soils. The runoff reductions that can be achieved with the application of BIHs are 38.98-95.73% for silt soils and 20.67-54.28% for clay soils, depends on the soil conditions.

Geosfera Indonesia

Several attempts have been made to increase the permeable area in the cities, which include the b... more Several attempts have been made to increase the permeable area in the cities, which include the building of green facilities such as parks and urban forests. Since these areas were built with soil compaction, the potential for infiltrating water differs compared with the natural green area. Therefore, this research aims to analyze the influence of soil conditioning on the constant infiltration rate using variables such as soil compaction, texture, and the presence of vegetation cover in urban facilities. The data used were obtained through field infiltration measurement using a single ring infiltrometer. In this research, the analysis carried out includes soil texture, Horton equation, the difference between conditioned soils and control plots, and USDA hydrologic soil classifications. The results showed that all variables (soil compaction, the presence of vegetation cover, and soil texture) have a significant effect on the constant infiltration rate. Based on the soil conditioning,...

Trends in Sciences

Mahakam is the second longest river in Indonesia and it functions as a source of raw water for dr... more Mahakam is the second longest river in Indonesia and it functions as a source of raw water for drinking and other essential activities for the Samarinda people. Furthermore activities in the watershed generate solid waste such as plastic, which enters the waters and is potentially degraded into microplastics. There is a possibility that the presence of microplastics is affected by anthropogenic types along the river. Therefore, this research aims to determine the effect of anthropogenic type and river depth on the microplastic abundance in the Mahakam River. The samples were taken using an integrated approach at 3 depths, namely 0.5, 1, and 1.5 m, in 2 locations with different anthropogenic types. The sampling points include Kampung Tenun and Bukuan Villages, which represented densely populated and non-populated areas, respectively. The water collected was prepared with the following steps, which include filtration with 180 μm nylon, elimination of organic matter, density separator,...

TEKNIK

Distribusi air di Kota Samarinda masih belum optimal dikarenakan factor tekanan air di dalam pipa... more Distribusi air di Kota Samarinda masih belum optimal dikarenakan factor tekanan air di dalam pipa yang rendah pada waktu tertentu dan kehilangan air fisik karena kebocoran. Artikel ini memuat analisis jaringan perpipaan distribusi air bersih di Kelurahan Harapan Baru, Kota Samarinda menggunakan perangkat lunak EPANET 2.0. Hasil simulasi dibandingkan dengan hasil pengukuran tekanan air di lapangan pada kran pelanggan menggunakan manometer. Dari hasil penelitian, diketahui terdapat sebanyak 7 junction yang nilai tekanan airnya di bawah batas minimum kriteria pipa distribusi dari Peraturan Menteri Pekerjaan Umum No.18/PRT/M/2007 sebesar 0,5 atm, serta sebanyak 11 pipa yang nilai kecepatan aliran airnya di bawah batas minimum kriteria yang sama sebesar 0,3 m/s. Rekomendasi perbaikan jaringan perpipaan distribusi air bersih berupa tekanan minimum sebesar 0,5 bar pada pelanggan dan kontinuitas, yakni perubahan pengaturan tekanan pada valve existing, dan penambahan pompa booster pada beber...

IPTEK Journal of Proceedings Series

The application of bio-pore infiltration holes (BIH) can be one solution for urban runoff managem... more The application of bio-pore infiltration holes (BIH) can be one solution for urban runoff management by reducing surface runoff to the ground. But, the difference in soil types and characteristics could affect the runoff reduction that can be achieved by BIH. This research aims to determine the runoff reduction can be achieved by bio-pore infiltration hole (BIH) from different soil types and conditions. The methods in this study mainly focus on hydraulic conductivity calculations using Porchet method and the implementation of Minister of Environment Regulation Numb. 12/2009 for the BIH installations. Based on the implementation of Minister of Environment Regulation Numb. 12/2009, the required BIHs for the area of 500 m2 are 1,000, both for silt and clay soils. The runoff reductions that can be achieved with the application of BIHs are 38.98-95.73% for silt soils and 20.67-54.28% for clay soils, depends on the soil conditions.

Geosfera Indonesia

Several attempts have been made to increase the permeable area in the cities, which include the b... more Several attempts have been made to increase the permeable area in the cities, which include the building of green facilities such as parks and urban forests. Since these areas were built with soil compaction, the potential for infiltrating water differs compared with the natural green area. Therefore, this research aims to analyze the influence of soil conditioning on the constant infiltration rate using variables such as soil compaction, texture, and the presence of vegetation cover in urban facilities. The data used were obtained through field infiltration measurement using a single ring infiltrometer. In this research, the analysis carried out includes soil texture, Horton equation, the difference between conditioned soils and control plots, and USDA hydrologic soil classifications. The results showed that all variables (soil compaction, the presence of vegetation cover, and soil texture) have a significant effect on the constant infiltration rate. Based on the soil conditioning,...