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PENGOLAHAN AIR BERKUALITAS RENDAH MENJADI AIR DOMESTIK NON KONSUMSI (Studi Kasus : Air Sungai Way Belau Kuripan - Bandar Lampung)

Jurnal Rekayasa Vol 13, No 3 (2009): Edisi Desember Tahun 2009
Publisher : UNIVERSITAS LAMPUNG

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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.

Perencanaan Embung di PT. Perkebunan Nusantara 7 Unit Usaha Bunga Mayang, Kabupaten Lampung Utara

Jurnal Rekayasa Sipil dan Desain Vol 5, No 4 (2017): Edisi Desember 2017
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Dalam rangka peningkatan produktivitas kebun tebu di PT. Perkebunan Nusantara 7 Unit Usaha Bunga Mayang, Kabupaten Lampung Utara, dilakukan revitalisasi puluhan embung untuk memenuhi kebutuhan air irigasi tanaman tebu.Perhitungan – perhitungan yang dilakukan dalam perencananaan embung ini meliputi analisa kapasitas tampungan menggunakan lengkung kapasitas, perhitungan curah hujan rencana menggunakan metode Log Pearson Tipe III, debit rencana menggunakan metode Rasional, analisa spillway, analisa tubuh embung, serta analisa kestabilan tubuh embung terhadap longsor.Dari perhitungan yang telah dilakukan diperoleh kapasitas tampungan sebesar 37224,24 m3, curah hujan rencana periode ulang 25 tahun sebesar 121,2384 mm, debit rencana periode ulang 25 tahun sebesar 1,89 m3/detik, mercu spillway menggunakan mercu Ogee Tipe I dengan elevasi mercu pada +42,5 dan elevasi muka air banjir pada +42,70. Tubuh bendungan menggunakan urugan tanah dengan kemiringan hulu 1 : 3 dan hilir tubuh embung adalah 1 : 2,25, elevasi puncak berada pada +44,0 dan elevasi dasar berada pada + 36,0. Tinggi jagaan tubuh embung dipakai sebesar 1,50 meter. Tubuh embung dan spillway dinyatakan aman terhadap gaya – gaya yang terjadi. Kata kunci : Embung, perencanaan, irigasi, PTPN 7.

Rainwater Harvesting as Alternative Source for Wudlu Water in Indonesia

Civil and Environmental Science Journal Vol 1, No 2 (2018)
Publisher : Fakultas Teknik UB

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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.

STUDI KEBUTUHAN AIR DOMESTIK UNTUK DAERAH PANTAI (STUDI KASUS: KOTA BANDAR LAMPUNG)

Jurnal Rekayasa Vol 18, No 3 (2014): Edisi Desember 2014
Publisher : UNIVERSITAS LAMPUNG

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Abstract

This study aims to investigate water domestic demand of people living in coastal area of Bandar Lampung City. The location of the study is in the Sukaraja area, Bumi Waras Sub-district, Bandar Lampung City. Data mining of household water demand is undertaken by using questionnaire to 65 households. It is indicated from the survey that every household averagely consits of 4 persons. Everry person spends about IDR 368 for 103.4 l of water domestic in daily basis. Daily water domestic demand of the people in the are study is quite different from the standard daily water domestic demand percapita. This deviation is due to the differences in the aspect of social and economy between the people in the are study and ordinary people

OPTIMASI WADUK REGULATING DAM DI KABUPATEN PRINGSEWU, PROVINSI LAMPUNG

Jurnal Rekayasa Vol 19, No 1 (2015): Edisi April 2015
Publisher : UNIVERSITAS LAMPUNG

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Abstract

Argoguruh Weir is the biggest irrigation weir in Lampung Province. This hydraulic structure was developed in 1935, crossing Way Sekampung River and serving Sekampung Irrigation Area which is about 67,000 ha. This weir is supplied by water from Batutegi Dam and baseflow of the upper Way Sekampung basin. Excessive water in Argoguruh Weir is passing by and flowing to the sea. Due to this condition, the government plan to build a dam between Batutegi Dam and Argoguruh Weir. This research aims to carry out a simulation of water balance in the Regulating Dam in order to find the best operational pattern for the dam. The Objective function of the simulation is water ele- vation of reservoir with probability more than 80%. The constrain of the simulation is that water elevation of the reservoir has to be higher than the water elevation of reservoir dead storage that is +102.30 m. Discharge data used in the simulation is daily discharge data of Argoguruh Weir from the year 2005 to the year 2013. The simulation is operated in 15-days time basis. Results of the simulation indicate that the objective function of the simulation is found in elevation +116.07 m with probability of 80.09%. On that condition, water from the reservoir is utilised for PDAM Pringsewu water supply and for the water supply for 242.90 ha new irrigation area. The lowest water elevation in this condition is +111.86 m. This water elevation is much more higher than the one of reservoir dead storage.

Data Generation In Order To Replace Lost Flow Data Using Bootstrap Method And Regression Analysis

Civil and Environmental Science Journal Vol 1, No 1 (2018)
Publisher : Fakultas Teknik UB

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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.

Perencanaan Check Dam Penampung Sedimen Di Sungai Jepara Kecamatan Way Jepara Kabupaten Lampung Timur

Jurnal Rekayasa Sipil dan Desain Vol 4, No 1 (2016): Edisi Maret 2016
Publisher : Jurnal Rekayasa Sipil dan Desain

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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

PERENCANAAN DINDING PENAHAN TANAH PADA SUNGAI WAY HUI KABUPATEN LAMPUNG SELATAN

Jurnal Rekayasa Sipil dan Desain Vol 5, No 2 (2017): Edisi Juni 2017
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Flooding is an event that occurs when water flows water on the land, the EU defines flooding as a temporary immersion by water on land that is not normally submerged in water. Based on water sources that become reservoirs on earth, the type of flood is divided into three, namely river flood, lake flood, and flood tides. Floods that occur in some areas in Lampung are caused by overflow of water from rivers such as Way Hui rivers triggered by several things, namely garbage, river narrowing and drainage, and high rainfall. This study aims to analyze rainfall data in the study area. In addition, the plan also aims to calculate the design of rain and flood design in the study area and conduct retaining wall planning in the study area. In this study, the procedures used are data collection of rainfall and river basin data, calculation and rainfall analysis, calculation and analysis of rainfall design, calculation and analysis of rainfall intensity, calculation and design of debit analysis, calculation and analysis of slope stability, And Plan budget (RAB) budget. The results showed that the calculation of slope stability using Fellenius Method and Bishop Method. After the calculation, the security number (FK) of 1,317 for the Fellenius Method, and the security number (FK) for the Bishop Method is 1.351. With these results, the FK> 1 qualified safe is for the planning of retaining wall in Way Hui river. Then the authors calculate the cost budget plan (RAB) to build the retaining wall of the land and obtained a price of about Rp. 428.215.506,00. Keywords: flood, slope stability, flood dischargeAbstrakBanjir adalah peristiwa yang terjadi ketika aliran air merendam daratan, Uni Eropa mendefinisikan banjir sebagai perendaman sementara oleh air pada daratan yang biasanya tidak terendam air. Berdasarkan sumber air yang menjadi penampung di bumi, jenis banjir dibedakan menjadi tiga, yaitu banjir sungai, banjir danau, dan banjir laut pasang. Banjir yang terjadi disejumlah daerah di Lampung yang disebabkan oleh meluapnya air-air dari sungai seperti sungai Way Hui yang dipicu oleh beberapa hal, yaitu sampah, penyempitan sungai dan drainase, serta curah hujan yang tinggi.Penelitian ini bertujuan untuk menganalisa data hujan pada daerah studi. Selain itu, perencanaan ini juga bertujuan untuk melakukan perhitungan hujan rancangan dan banjir rancangan pada daerah studi dan melakukan perencanaan dinding penahan tanah pada daerah studi tersebut. Pada penelitian ini prosedur yang digunakan adalah pengumpulan data hujan dan data DAS, perhitungan dan analisa hujan kawasan, perhitungan dan analisa hujan rancangan, perhitungan dan analisa intensitas hujan, perhitungan dan analisa debit rancangan, perhitungan dan analisa stabilitas lereng, dan rencana anggaran biaya (RAB). Hasil penelitian menunjukkan bahwa perhitungan stabilitas lereng menggunakan Metode Fellenius dan Metode Bishop. Setelah dilakukan perhitungan maka diperoleh angka keamanan (FK) sebesar 1,317 untuk Metode Fellenius, dan angka keamanan (FK) untuk Metode Bishop sebesar 1,351. Dengan hasil tersebut maka memenuhi syarat aman yaitu FK > 1 untuk perencanaan dinding penahan tanah pada sungai Way Hui. Kemudian penulis menghitung rencana anggaran biaya (RAB) untuk membangun dinding penahan tanah tersebut dan diperoleh harga sekitar Rp. 428.215.506,00  Kata kunci : banjir, stabilitas lereng, debit banjir

Perencanaa Sistem Penyediaan Air Baku di Kecamatan Punduh Pidada dan Kecamatan Padang Cermin, Kabupaten Pesawaran

Jurnal Rekayasa Sipil dan Desain Vol 4, No 3 (2016): Edisi September 2016
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

The main needs of water for various purposes will continue to increase based on thenumber of people who continue to grow and the development of the rate of developmentsin various sectors. On the other hand, the number of infrastructure delivery of water iscurrently still relatively limited, that hasn’t meet the needs of water. The demandsunavoidable, but shall predictable and planned utilization as well as possible. A trendfrequent are the imbalance between supply and demand for water. To achieve a balancebetween the need for water and availability of water in the future , efforts are required tomeet builders infrastructure raw water community.Domestic water needs for Padang Cermin sub-district is 32,46 l / s and Punduh Pidadasub-district is 10 l / s for 2015. For the next 20 years, the demands for water will be71,18 l/s for Padang Pidada sub-district and 71,18 l/s for Padang Cermin sub-district.The availability of water must meet the size of the high demand for water in order tosatisfy their daily needs. Methods used to acknowledge the number of the availability ofwater is the method by F.J. Mock. The calculation on that available minimum dischargein das way selorejo is 78 l / s and das way curup is 97 l / s.From the calculation on above, the availability and needs water at das way curup anddas way selorejo had a surplus of the availability of water because environmentalconditions in kecamatan punduh pidada and kecamatan padang cermin is in goodcondition.Keywords : Water needs, availability of water, Water Supply Building Materials

Desain Penampang Sungai Way Besai Melalui Peningkatan Kapasitas Sungai Menggunakan Softwere HEC-RAS

Jurnal Rekayasa Sipil dan Desain Vol 4, No 2 (2016): Edisi Juni 2016
Publisher : Jurnal Rekayasa Sipil dan Desain

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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.