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ANALISA PERAMALAN DEBIT SUNGAI MENGUNAKAN METODE ARIMA (AUTO REGRESSIVE INTEGRATED MOVING AVARAGE) DI SUNGAI BRANTAS HULU Hanggara, Ikrar; Limantara, Lily Montarcih; Sisinggih, Dian
Jurnal Teknik Pengairan Vol 6, No 2 (2015)
Publisher : Jurusan Teknik Pengairan, Fakultas Teknik, Universitas Brawijaya

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Abstract

Abstrak: Debit sungai sangat dipengaruhi oleh hujan, sehingga memiliki pola yang dapat diteliti intensitasnya. Studi ini dilakukan untuk mengetahui akurasi metode peramalan debit ARIMA yang nantinya dapat digunakan sebagai pedoman penyusunan pola operasi waduk khususnya waduk Sengguruh.Data yang digunakan adalah data debit selama 10 tahun dan data tahun terakhir (2011) dipergunakan sebagai pembanding. Peramalan dilakukan juga di titik pengukuran debit (Stasiun AWLR) Gadang dan Tawangrejeni guna mengetahui penerapan metode ARIMA tersebut untuk stasiun debit dalam satu skema sungai.Akurasi terbaik dalam peralaman debit sungai didapatkan pada peramalan Inflow Waduk Sengguruh dengan nilai MAPE (Mean Absolute Percentage Error) 14,47% dan nilai KR (Kesalahan Relatif) 1,41% dari akumulasi volume tampungan.Hasil analisa pola operasi Waduk Sengguruh diketahui bahwa debit aktual maupun ramalan tidak dapat memenuhi kebutuhan energi selama 1 tahun pada tahun 2011, dan hasil peramalan maupun aktual tidak memiliki selisih yang signifikan terhadap produksi energi PLTA. Hal ini membuktikan bahwa metode peramalan dengan menggunakan ARIMA baik untuk digunakan.Kata Kunci: Peramalan debit, Pola Musiman, Pola Operasi, Waduk Sengguruh Abstract: Streamflow is greatly influenced by rain, so it has a pattern that can be observed for its intensity. This study was conducted to determine the accuracy of forecasting discharge by ARIMA methods that can be used as guidelines for the preparation of reservoir operation pattern especially in Sengguruh reservoir.The data used is the flow for 10 years and last year's data (2011) is used as a comparison. Forecasting is also doing at the point of discharge measurements (AWLR Station) Gadang and Tawangrejeni to determine the application of the ARIMA method for discharge station in the river scheme.The best accuracy in forecasting streamflow obtained on Reservoir Inflow Sengguruh with MAPE value (Mean Absolute Percentage Error) 14.47% and the value of KR (Relative Error) 1,41% of the accumulated volume of the storage.Results of analysis of the pattern of Sengguruh reservoir operation reveals that actual and forecast discharge can not meet the energy needs for one year in 2011, and the actual results of forecasting are not have a significant difference to the energy production of hydropower. This proves that the using ARIMA forecasting method is good for application.Keywords: Forecasting Discharge, Seasonal Flow Pattern, Pattern of Reservoir Operation, Sengguruh Reservoir.
POTENSI PLTMH (PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO) DI KECAMATAN NGANTANG KABUPATEN MALANG JAWA TIMUR Hanggara, Ikrar; Irvani, Harvi
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 2, No 2 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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Abstract

Ngantang part of Malang Regency, located at an altitude between 500-700m above sea level. Judging from the topographical conditions, the potential energy of the water used as a source of energy for the MHP in this area is very high. To be able to calculate the potential energy of MHP good electricity necessary to analyze the reliability of river discharge (m3/s), high water fall (meters) and the time of engine operation plan generation (hours). Reliability discharge is obtained by calculating the flow data with FJ.Mock method. Evapotranspiration value in this study using Penman Method. Meanwhile, the data discharge measurements conducted field observations as a discharge control method of calculation results FJ.Mock. Based on the research results obtained in four locations debit mainstay at 0:39 Q60 m3 / sec (Jombok), 1:02 m3 / sec (Waturejo), 0:48 m3 / sec (Ngantru I), 3:14 m3 / sec (Ngantru II). Average large power awakened by calculation is 47.75 K. This amount is equivalent to the fulfillment of the electricity needs of as many as 47 home residences.
PERENCANAAN PERKUATAN TEBING PADA RUAS JALAN MALANG - KEDIRI STA ( 30KM ) DENGAN MENGGUNAKAN DINDING PENAHAN TANAH TIPE KANTILEVER DI DESA KAWADEN, KECAMATAN NGANTANG, KABUPATEN MALANG Nenohai, Imanuel F; Rasidi, Nawir; Hanggara, Ikrar
eUREKA : Jurnal Penelitian Mahasiswa Teknik Sipil dan Teknik Kimia Vol 1, No 2 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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Abstract

Retaining wall is one of the structures that serves to maintain the stability of a landfill, so the heap is not moving or landslides. This building is mostly used in irrigation projects, highways, ports and others. In general, the use of retaining walls in the field consists of two types of gravity type and cantilever type. The main difference between the construction of these two types of retaining walls is that of the cantilever type, whereas the type of gravity does not use reinforcement. In terms of use, the cantilever type is more widely used for slopes that have a height of more than 6 meters, while the gravity type is used for altitudes less than 6 meters. The stability of the retaining wall can be expressed by the value of Fs (safety factor). The value of the security factor under consideration is Fs Overtuning which is the security factor to the rolling force, Fs Slading is the safety factor of the shear, Fs bearing capacity is the safety factor to the collapse of carrying capacity. Therefore, the purpose of this study is to know the efficiency of the base width of cantilever type cantilever wall on Abd.Manan Wijaya Road which is located in Kaweden Village, Ngantang District, Malang Regency so that it is stable to the style of bolsters, shear and soil bearing capacity. After the calculation, the result of stability factor to shear 1.61> 1.5 (safe), stability to bolsters 2.0> 1.5 (safe), Stability Against soil bearing capacity 142,795> qa = 123.39 kN / M2. Then it can be concluded that the condition of cantilever cantilever wall stability is safe against danger of bolsters, shear and soil bearing capacity. Keywords: Cantilever Wall Retaining Wall, Base width efficiency, Stability
STUDI PENENTUAN FAKTOR KEAMANAN STABILITAS LERENG MENGGUNAKAN METODE FELLINIUS DAN BISHOP PADA DINDING PENAHAN BATU KALI DI JL. RAYA BEJI PUSKESMAS KOTA BATU Mau, Jefrianus; Rasidi, Nawir; Hanggara, Ikrar
eUREKA : Jurnal Penelitian Mahasiswa Teknik Sipil dan Teknik Kimia Vol 1, No 2 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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Abstract

Landslides are frequent disasters in the region of Batu, the intensity of heavy rainfall causing unstable slope conditions so that occurrence of landslides in the area of Jl. Raya Beji Puskesmas Kota Batu. The purpose of this study was to determine the safety factor of the smallest on the slope. Slope stability analysis is done using methods Fellinius and Bishop are in the process of the analyst performed using manual calculation table. From the analysis Fellinius methods produce FK = 0.41, FK = 0.30, FK = 0.34 and for the results of the analysis Bishop methods generate FK = 0.34, FK = 0.32, FK = 0.09 show slopes in the location of the landslide-prone state where FK
Analisa Kelayakan Teknis dan Ekonomi Embung Putukrejo Kabupaten Malang hanggara, ikrar; irvani, harvi
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 4, No 1 (2019): EDISI MARET 2019
Publisher : Universitas Tribhuwana Tunggadewi Malang

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Abstract

Putukrejo Village, Kalipare Subdistrict, is one of the villages in Malang Regency which in the last 4 years has always experienced drought. The drought that occurred for 4 months in the dry month caused some problems which made the villagers panic enough. Embung is an alternative solution to overcome drought. Embung has the function of storing rainwater to be stored and used during the dry season. To build a reservoir, it is necessary to study the feasibility of both technical and economic feasibility. The results showed that the stability of the reservoir to bolster was 5.7, for stability against shear was 1.21. The B / C value is 1.1 with a benefit value of Rp 97,485,300.00 and a cost value of Rp 143,790,817.00 so that the embung can be said to be economically and technically feasible.Abstrak: Desa Putukrejo Kecamatan Kalipare merupakan salah satu desa di Kabupaten Malang yang pada 4 tahun terakhir selalu mengalami kekeringan. Kekeringan yang terjadi selama 4 bulan pada bulan kemarau menyebabkan beberapa masalah yang cukup membuat warga desa panik. Embung merupakan salah satu alternatif solusi untuk mengatasi kekeringan. Embung mempunyai fungsi menampung air hujan untuk kemudian disimpan dan digunakan pada saat kemarau. Untuk membangun embung perlu dilakukan kajian terhadap kelayakan baik kelayakan secara teknis maupun ekonomi. Hasil penelitian menunjukkan bahwa stabilitas embung terhadap guling sebesar 5.7, untuk stabilitas terhadap geser sebesar 1.21. Nilai B/C sebesar 1,1 dengan nilai manfaat sebesar Rp 97,485,300.00 dan nilai biaya sebesar Rp 143,790,817.00 sehingga embung dapat dikatakan layak secara ekonomi dan teknis.Kata kunci: embung, kelayakan, konservasi, air, kekeringan
KONSTRUKSI PINTU KLEP RINGAN TAHAN KOROSI SEBAGAI PINTU PENGATUR IRIGASI TAMBAK PASANG SURUT Ulu Mali, Maxensius; Khaerudin, Dian Noorvy; Hanggara, Ikrar
eUREKA : Jurnal Penelitian Teknik Sipil dan Teknik Kimia Vol 1, No 2 (2017)
Publisher : Universitas Tribhuwana Tunggadewi Malang

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Abstract

The system operations distribution in Irrigation Farming region of brackish water ponds for this is still using traditional systems and often cause inpact not optimal productions of fish pond. To overcome the problem it is necessary planning and construction of the valve door is intended to support distribution of irrigation water and optimize water distribution systems more structured and improving land productivity of fish pond land. Construction flood gates automatically planned is flood gates valve with a corrosion-resistant lightweight materials strong and flexible for the distribution of brackish water in the irrigation pond. Dimensions Channel are based on conditions on the ground that the conditions of an open airway narrowing. In the upstream water level 1.17 m, of water level downstream 0.857 m, Height of gate opening 58.75 cm, angle of gate opening 520, water velocity V¬¬1 = 0.957 m/sec V2 = 0,813 m/sec, water flowgate Q1 = 2,03 m3/sec Q2 = 1,64 m3/sec. while for the stability of the floodgates to SF sliding = 8.978> 1.5, SF shear = 6.125> 1.5, the outbreak of the construction of e = 0.167
Analisa Tingkat Bahaya Erosi (Studi Kasus Gang Putingan Jl. Padat Karya Km-2 Muara Rapak Balikpapan Utara) Menggunakan Metode USLE Hanggara, Ikrar
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 2 (2019): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Abstract

Erosion is a natural process that often causes problems, especially if erosion has an impact on theurban area. The objective of the present study is to estimate the annual soil loss using USLE model inareas that have hilly topographic conditions in Putingan area, Jl.Padat Karya North Balikpapan Cityof Balikpapan. The method used is USLE (Universal Soil Loss Equation), using Erosivity Factor (R),Erodibility Factor (K), Topographic Factor (LS), Vegetation Cover Factor (C) and Erosion ControlFactor (P) is calculated to obtain the annual rate of erosion that located in Outlet of Watershed. Thequantity of soil loss that obtained from this study are categories as moderate erosion in the amount of130.1 tons / Ha / Year, while for the erosion hazard index included in the High category with aTolerable Soil Loss (TSL) value of 5.42, with that number then It is recommended that immediateaction be taken to reduce the potential for erosion hazard by controlling surface runoff and landengineering so as to reduce the rate of erosion.