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All Journal Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain Civil and Environmental Science Journal (CIVENSE) Spatial : Wahana Komunikasi dan Informasi Geografi Jurnal Profesi Insinyur Universitas Lampung Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung
Gatot Eko Susilo
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Other

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PENGOLAHAN AIR BERKUALITAS RENDAH MENJADI AIR DOMESTIK NON KONSUMSI (Studi Kasus : Air Sungai Way Belau Kuripan - Bandar Lampung) Sumiharni, Sumiharni; Susilo, Gatot Eko
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 13, No 3 (2009): Edisi Desember Tahun 2009
Publisher : UNIVERSITAS LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Air merupakan sumber daya alam yang diperlukan untuk hajat hidup orang banyak, bahkan olehsemua makhluk hidup. Oleh karena itu, sumber daya air harus dilindungi agar tetap dapatdimanfaatkan dengan baik oleh manusia serta makhluk hidup yang lain. Tujuan penelitian iniantara lain: mengetahui karakteristik kualitas air sungai Way Belau Kuripan berdasarkanparameter yang diuji, merakit instalasi pengolahan air sungai berkualitas rendah menjadi airdomestik non konsumsi, menganalisis kinerja dan keefektivan dari instalasi pengolahan air sungaitersebut.Dalam penelitian uji perlakuan ini menggunakan dua dosis koagulan yang berbeda. Air sungai dariSungai Way Belau Kuripan Bandar Lampung dicampur dengan kedua dosis koagulan tersebut.Dalam pelaksanaannya terdapat tiga sampel, yaitu sampel awal sebelum perlakuan, sampel hasilperlakuan pertama, dan sampel perlakuan kedua. Ketiga sampel diuji di laboratorium UPTD BalaiLaboratorium Kesehatan Provinsi Lampung untuk mengetahui parameter COD, pH, TSS, AmoniaNitrogen, DO dan BOD. Pada model instalasi, air sungai yang telah dicampur dengan tawas, batukapur dan kaporit kemudian diaduk menggunakan mixer lalu sampel diendapkan selama 24 jamkemudian disaring dengan filter karbon aktif dan serat nilon.Hasil pengujian sampel hasil perlakuan model instalasi menunjukkan hasil yang baik, terutamapada parameter COD, TSS, Amonia Nitrogen, dan DO. Hasil pengujian sampel menunjukkankadar tawas efektif yaitu 0,50 gram/liter ditambah 0,1 gram/liter batu kapur dan 0,05 gram/literkaporit. Kadar tersebut dapat menurunkan kadar COD,pH, TSS, Amonia Nitrogen, dan BOD sertamenaikkan kadar DO masing-masing mencapai 64,59%, 23,09%, 53,29%, 51,95%, 66,79 dan543,94%. Hasil penelitian ini telah mampu merubah air sungai Way Belau Kuripan yangberkualitas rendah menjadi air yang berkualitas lebih baik.
Data Generation In Order To Replace Lost Flow Data Using Bootstrap Method And Regression Analysis Susilo, Gatot Eko
Civil and Environmental Science Journal (CIVENSE) Vol 1, No 1 (2018)
Publisher : Fakultas Teknik UB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2018.00101.4

Abstract

This paper aims to find method to generate data in order to replace lost flow data in the series of discharge data in Sungai Seputih River, Lampung Province. Bootstrap simulation is used to estimate the discharge data and complete the existing discharge data. Regression analysis is also used to find the pattern of data distribution. Results of the research show that both methods are able to generate new series of flow data that the distribution is similar to available field data. Results also show that the use of statistical methods is one way to tackle the problem of data limitations due to missing or unrecorded data. The weakness of data generation using a combination of Bootstrap methods and regression analysis is the disappearance of extreme values in the data series. Existing extreme values have been modified to ideal values that satisfy certain distributions. However, careful analysis is required in using statistical method, so that the results of analysis do not deviate from the field conditions.
The analysis of rainwater harvesting carrying capacity on water domestic supply for dwelling areas in Indonesia Susilo, Gatot Eko; Jafri, Muhammad
Civil and Environmental Science Journal (CIVENSE) Vol 2, No 1 (2019)
Publisher : Fakultas Teknik UB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2019.00106

Abstract

This research aims to promote the method to design rainwater harvesting facilities in Indonesian dwelling areas. The estimation of rainwater harvesting (RWH) carrying capacity is undertaken using a simulation involving rainfall, inflow, and outflow data. The research was undertaken in Natar sub-district, Southern Lampung, Indonesia. Daily rainfall data from Branti Airport from 2013 to 2017 are used for the simulation. Research shows that houses in the study area can supply approximately 35% of their domestic water needs by applying RWH. This means that the support capacity of rainwater harvesting in the study area revolves around that value. The research also shows intensity of rainfall will greatly affect the carrying capacity of RWH. In addition to rainfall, the economic ability of a family plays an important role in planning the dimensions of a RWH facility in a house. Finally, maintenance of RWH facilities on a regular basis is important to ensure the operational effectiveness of RWH.
Rainwater Harvesting as Alternative Source for Wudlu Water in Indonesia Susilo, Gatot Eko
Civil and Environmental Science Journal (CIVENSE) Vol 1, No 2 (2018)
Publisher : Fakultas Teknik UB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2018.00102.3

Abstract

Indonesia is the country with the largest Muslim population in the world. And as a country with Muslim big population clean water for wudlu or purification must be available. Rainwater holds potential as an alternative source of wudlu water. Rainwater harvesting (RWH) for religious water supply is still very rare studied. Based on this, the research in this paper aims to calculate the potential supporting capacity of rainwater as an alternative sourceof wudlu water. Supporting capacity of rainwater harvesting (SCRWH) in this study was calculated by simulating inflow and outflow behavior at a rainwater harvesting facility in a mosque. Case study takes place at Nurul Iman Mosque in Southern Lampung. The mosque has an area of 168 m and able to accommodate 300 worshipers. Research show that the most effective reservoir size in the RWH facility in the observed mosque is between 15 to 30 m2 with SCRWH for wet years between 65% and 70% and for dry years between 44% and 53%, respectively. The availability of wudlu water in a mosque basically cannot be expected 100% comes from rain water only. In the application of RWH in a mosque the maintenance of theRWH facility must be undertaken well.
KAJIAN PENGGUNAAN METODE IP, STORET, dan CCME WQI DALAM MENENTUKAN STATUS KUALITAS AIR YUDA ROMDANIA; Ahmad Herison; Gatot Eko Susilo; Elza Novilyansa
Jurnal Spatial Wahana Komunikasi dan Informasi Geografi Vol 18 No 1 (2018): Jurnal SPATIAL - Wahana Komunikasi dan Informasi Geografi, Volume 18 Nomor 1, Ma
Publisher : Department Geography Education Faculty of Social Science - Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (429.253 KB) | DOI: 10.21009/spatial.181.05

Abstract

Air kebutuhan makhluk hidup yang utama dalam kehidupan sehari-hari. Pemantauan kualitas air perlu dilakukan pada air sungai, air laut, air danau, air rawa dan air tanah sehingga air dapat dimanfaatkan sesuai dengan kegunaannya. Kajian ini bertujuan untuk menganalisa penggunaan metode perhitungan indeks kualitas air dalam menentukan status kualitas air permukaan sehingga diketahui metode yang paling efektif, sensistif dan obyektif. Metode perhitungan Indeks Kualitas Air (IKA) diperlukan untuk menyederhanakan banyaknya nilai dari berbagai jenis parameter menjadi sebuah angka tunggal yang mampu mendeskripsikan kondisi kualitas air, sehingga lebih mudah dipahami oleh masyarakat. Ada beberapa metode perhitungan IKA di berbagai Negara, metode Storet, IP, dan CCME WQI (Canadian Council of Ministers of The Environment). Metode tersebut akan dibandingkan dengan beberapa indikator. Hasil kajian menunjukkan Metode IP lebih unggul jika memakai data tunggal, karena memiliki kelebihan dari segi biaya dan waktu namun hanya mempresentasikan status mutu air pada saat itu saja tidak dalam periode tertentu. Metode Storet dan CCME menggunakan data perulangan sepanjang waktu (time series data), sehingga lebih menggambarkan status mutu air dalam periode tertentu. CCME WQI lebih unggul dari Metode Storet dan Metode IP karena memperhitungkan besarnya selisih hasil pengujian yang melebihi baku mutu melalui F3 (Amplitude). Dari kajian di atas disimpulkan, Metode CCME merupakan metode yang paling tepat untuk menganalisis kualitas air di berbagai negara termasuk Indonesia baik pada air permukaan maupun air tanah dengan tingkat efektivitas dan sensitivitas yang lebih tinggi dibandingkan dengan metode lainnya serta penggunaan jumlah dan jenis parameter yang fleksibel. Kata kunci : Kualitas Air, Indeks Kualitas Air, Air Permukaan
STUDI KEBUTUHAN NYATA AIR BERSIH PER KAPITA PADA KOTA BANDAR LAMPUNG Sinia, Ria Oktaviani; Susilo, Gatot Eko
Jurnal Profesi Insinyur Universitas Lampung Vol. 2 No. 1 (2021)
Publisher : Fakultas Teknik Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (283.068 KB) | DOI: 10.23960/jpi.v2n1.53

Abstract

As we already known, along with the increasing and bigger of the population, the number of life necessities that must be fulfilled is also getting bigger. One of main necessities of life that must always be fulfilled are clean water. This study aims to: (1) to investigate the amount of clean water demand per capita in Bandar Lampung City; (2to identify all the factors that affect theamount of clean water needs, (3) to counting the amount of clean water consumption costs, (4) to compare this results than research before. Location of this research are at Bandar Lampung City area which covers 20 sub-districts and 126 villages. Data collection on clean water needs was carry out using a questionnaire that distributed to 126 households randomly. The conclution of this research, are: (1) The amount of clean water per capita at Bandar Lampung are about 130.44 ltr/person/day. (2) The factors that influence the amount of clean water used, are: number of family members, education status, type of work, number of vehicle ownership, and ease of obtaining water. The cost of clean water needs issued at Bandar Lampung City in every month ranges from Rp. 127,267.00 up to Rp. 187,449, 00. (4) The results that obtained in this study are far different from the results of Kindler and Russel's (1984), which stated that the average water use for households is 295 ltr /person/day. But the results obtained in this study approached the Planning Criteria Set by the Directorate General of Human Settlements, Public Works Agency in 1996, which stated that the Big City, which has population of 500,000 - 1,000,000 people, will has domestic water needs about 120 ltr/person/day until 150 ltr/person/day.
Karakteristik Distribusi Curah Hujan Di Wilayah Sungai Mesuji - Sekampung Philipus, Philipus; Susilo, Gatot Eko; Irianti, Laksmi
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 8 No. 1 (2020): Edisi Maret 2020
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v8i1.1284

Abstract

Penelitian ini bertujuan untuk menganalisa metode analisis frekuensi yang paling dominan di wilayah sungai Mesuji–Sekampung serta membandingkan hasilnya dengan data di lapangan. Metode analisis frekuensi yang digunakan yaitu metode Normal, Gumbel dan Log Pearson III. Selanjutnya metode analisis frekuensi tersebut digunakan untuk mencari nilai hujan rancangan dua tahunan, lima tahunan, sepuluh tahunan. Adapun data yang digunakan adalah data hujan harian maksimum tahunan dari 15 stasiun pancatat curah hujan disepanjang sungai Mesuji-Sekampung. Uji probabilitas yang digunakan adalah metode Chi-Kuadrat serta penggunaan batas atas dan batas bawah untuk memastikan hasil analisis sudah sesuai standar. Selanjutnya membandingkan hasil analisis dengan data di lapangan. Perhitungan analisis frekuensi menggunakan ketiga metode di atas dari 15 stasiun pencatat curah hujan di hitung seluruhnya. Hasil perhitungan lalu  diuji menggunakan metode Chi-kuadarat dan hasilnya yaitu, metode Normal dapat diterima di 14 stasiun, metode Gumbel diterima di 11 stasiun, metode Log Pearson III diterima di 12 stasiun. Selanjutnya hasil tersebut baik hujan rancangan dua tahunan, hujan rancangan lima tahunan dan hujan rancangan sepuluh tahunan masih dalam angka aman karena tidak keluar dari batasan yang sudah dibuat, yaitu 105 % dari rata – rata hujan rancangan T tahun untuk batas atas dan 95 % untuk batas bawah. Perbandingan Hasil analisis frekuensi untuk hujan rancangan T tahun metode Normal efektif digunakan di 7 stasiun, mtode Gumbel efektif digunakan di 4 stasiun, sedangkan untuk metode Log Pearson III efektif digunakan di 4 stasiun.     Kata kunci : analisis frekuensi, hujan rancangan, Normal, Gumbel, Log Pearson III
ANALISIS PENGARUH ANOMALI IKLIM TERHADAP CURAH HUJAN DI PROVINSI BENGKULU Ismail, Muhammad Rizky; Zakaria, Ahmad; Susilo, Gatot Eko
REKAYASA: Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol. 24 No. 1 (2020)
Publisher : Jurusan Teknik Sipil Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/rekrjits.v24i1.11

Abstract

Propinsi Bengkulu adalah salah satu daerah di Indonesia yang dipengaruhi oleh anomali iklim, diantaranya adalah bencana banjir dan kekeringan. Dengan demikian, diperlukan penelitian untuk mengetahui pengaruh  anomali iklim terhadap curah hujan di Propinsi Bengkulu. Tujuan penelitian ini adalah untuk mengetahui: daerah yang dominan terpengaruh oleh anomali iklim, perulangan anomali iklim dan kecendrungan pertum-buhan anomali iklim di Propinsi Bengkulu. Metode yang digunakan adalah metode fast fourier transform (FFT) dan lomb periodogram. Hasil penelitian  menunjukkan periode frekuensi dominan adalah perulangan 2,8 tahun untuk FFT, sedangkan lomb periodogram adalah 3,8 – 4,4 tahun. Hasil analisis FFT menunjukkan nilai amplitudo dari data BMKG adalah 1,2 mm2-3,4 mm2, sedangkan dari  data TRMM nilai amplitudo adalah 0,1 mm2 – 0,6 mm2. Dengan menggunakan metode lomb periodogram didapatkan nilai amplitudo 2,5 mm2 – 25 mm2 dari data BMKG dan dari data TRMM diperoleh amplitude sebesar 0,28 mm2- 0,37 mm2. Kesimpulan dari hasil penelitian ini adalah anomali iklim yang berpengaruh menurut hasil FFT  adalah IODM  dengan perulangan 2,8 tahun, sedangkan dari lomb periodogram yang berpengaruh adalah ENSO dengan perulangan 3,8 – 4,4 tahun. Disimpulkan pula bahwa daerah dominan terpengaruh oleh anomali iklim menurut data BMKG adalah Kepahiyang, sedangkan untuk TRMM adalah daerah Fatmawati dan Pulau Baai. Untuk kecenderungan pertumbuhan pengaruh anomali iklim, bahwa setiap stasiun kecuali Fatmawati BMKG, punya kecendrungan naik.
Perencanaan Check Dam Penampung Sedimen Di Sungai Jepara Kecamatan Way Jepara Kabupaten Lampung Timur Nainggolan, Susi Suryanta; Susilo, Gatot Eko; Perangin - Angin, Geleng
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 1 (2016): Edisi Maret 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i1.343

Abstract

Jepara watershed is part of the watershed is located in East Lampung district with an area of 10km 2 , where Jepara River is one of river flowing into Lake Jepara. Jepara River conditions at thistime had a reduction in the flow of flood discharge due to reduced cross-sectional area of the riverdue to sedimentation. The main cause of the high rate of sedimentation is the destrusction of watercatchment areas and land management less attention to the principles of conservation land.Therefore it is very necessary management effective river drainage area with emphasis on theconservation and protection of the land and water, especially in the upper reaches of the river.One of the measures for erosion and sedimentastion problem in this river is by building sedimentcontrol structures or so-called check dams.From the calculations have been done check dam is planned to have the following physical;lighthouse spillway crest elevation checkerboard on +35,915 m elevation with an effective heightof 3 m and a depth of 2,5 m foundation,wide spillway lighthouse checkerboard obtained by 40 m,Q design with a return period of 50 years at 119,9113 m3/sec, high wing checkerboard of 2,007 min elevation +39,622 with a height of 0,6 m surveillance, construction of the main dam is aconcrete construstion, lighthouse spillway crest elevation of the sub dam +33,915 m with a heigtof 1 m and a lighthouse foundation depth of 1,2 m, a high wing sub dam at 1,9 m an elevation of +34,4251 m with a height of 1,0 m surveillance, construction of the sub dam is a concreteconstrustion,the elevation of the floor protected at +32,915 m elevation with a thickness of 0,5 m,the construction of a concrete construstion.Keywords : Jepara River, erosion, sedimentation, checkdam
Desain Penampang Sungai Way Besai Melalui Peningkatan Kapasitas Sungai Menggunakan Softwere HEC-RAS Utami, Tri; Purwadi, Ofik Taufik; Susilo, Gatot Eko
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 2 (2016): Edisi Juni 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i2.365

Abstract

Way Besai river is located in Sumberjaya subdistrict, West Lampung district, Lampung. It is one of the sub river from Tulang Bawang river. Way Besai river has been used as a the electric power source, known as Besai hydropower. Besai Hydropower has decreased energy supply of 40 MW from the supply optimum can reachs 90 MW. his is due to the catcment area conditions of the Way Besai rivers are "metastable" so which effected in the shallowing of the cross-section quickly. So it needs the capacity increased of the cross-section of the river until the early condition where is the supply can reachs 90 MW.For the first step in improving the capacity of the Way Besai river needed hydraulics river simulation process that facilitated by using Hydrologic Engineering Center-River Analysis System (HEC-RAS) Program. HEC-RAS program can help to modeling the flow of cross-section of the river on the existing condition and normalization using the steady flow options and data input including maximum discharge data. The output of modeling using HEC-RAS program can be seen in the form of pictures and a table that presents the characteristics of a cross-section of the river.From the result of the analysis founded that to reach the normalization condition, needs the dredging until the elevation +713,00 level, with 2.435.590,09 m3 of volume capacity of dredging. When the water level of the river reachs Full Supply Level (FSL) elevation that is on elevation +722,00 level founded that the maximum discharge in the downstream in the amount of 57,19 m3/s, with water volume capacity in the 1.471.185,77 m3. For the Reservoir Surface Area in Way Besai river has increased with 28,6% from the exsisting condition that recorded from Sta 0+000 level until sta 3+391,45 level Keywords: Debit ,HEC-RAS, Manning calibration , Normalization, River.
Co-Authors Afifa, Hasna Nur Ahmad Herison Ahmad Zakaria Ahmad Zakaria Ardian, Riko Berli Elza Novilyansa Endro Prasetyo Wahono Fath, Zaina Khoerunnisa Nurul Febrian Febrian Febrian, Febrian Geleng Perangin - Angin Geleng Perangin - Angin, Geleng Ha, Park Eun Kristia, Merida Laksmi Irianti Laksmi Irianti M Rizky Ismail Margaretta Welly Merida Kristia Muhammad Jafri nur, rizki abadian Ofik Taufik Purwadi Ofik Taufik Purwadi, Ofik Taufik Park Eun Ha Philipus Philipus Philipus, Philipus Riko Berli Ardian rizki abadian nur rudi hari perdana Sinia, Ria Oktaviani Sumiharni Sumiharni Susi Suryanta Nainggolan Susi Suryanta Nainggolan, Susi Suryanta Tri Utami Tri Utami Yuda Romdania Yuda Romdania Zaina Khoerunnisa Nurul Fath