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Trimaijon Trimaijon
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Analisis Indeks Kekeringan Daerah Aliran Sungai Batang Anai Dengan Menggunakan Metode Standardized Precipitation Index Nurhasanah Nurhasanah; Manyuk Fauzi; Trimaijon Trimaijon
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

There are several problems related to water resources such as floods and drought. One of the critical issue is drought. Drought is a nature phenomenon which is considered as common dangers which occurs in accordance of climate cycle related to hydrological cycle that affected by rainfall. Drought that affected only by rainfall is meteorological drought which is an early indication of drought. Based on the large impact, it is necessary to analyze index of dryness to find out the level of dryness as the early warning of further droughts. The location of the research was the Batang Anai watersheds which is one of water source of agricultural sector in Sumatera Barat Province. Standardized Precipitation Index (SPI) was one of the methods to analyze drought index in an area. The calculation was done based on rainfall data of half monthly period and monthly period from 1997 to 2016 on every rain station in DAS Batang Anai. The result of SPI drought index was correlated with Indian Ocean Dipole (IOD) phenomenon and then was mapped using ARC GIS software with tools Polygoon Thiessen. The final result of this research showed that in half period the highest value of drought index was -2,3811 (January, 1st periode, 2013) with extreme drought classification. While in monthly period, the value of drought index was -1,9183 (January, 2012) with very dry classification. This research also showed the suitability of SPI drought index with IOD drought phenomenon which has suitable average 70,14%.Keywords : Drought index, Standardized Precipitation Index, GIS, Indian Ocean Dipole
Kajian Antisipasi Defisit Air Daerah Irigasi Sei Paku Pada Kondisi Kering Meteorologis ( Daerah Irigasi Sei Paku, Kecamatan Kampar Kiri, Kabupaten Kampar) Sudarmanto Sudarmanto; Mudjiatko Mudjiatko; Trimaijon Trimaijon
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Sei paku irrigation area is located in Kampar Kiri District, Kampar Regency, Riau Province, this irrigation area is specifically planned for rice fields with total area of ± 1000 Hectares. Function change from agricultural land into fish ponds and palm plantation resulted potential land decrease to ± 350 Hectares. Uncontrolled water utilization for fish pond, channels leakage and influence of meteorological factors resulted water supply shortage for agricultural land and water deficit for certain month.Analysis of evapotranspiration, effective precipitation, percolation and water replacement are used to determine the value of the rice water requirement of plant and crops planting. Fish pond water demand and oil palm plantations is used as a reduction of the value of intake discharge, which then the rest of discharge will be used as a main rate of flow for fulfilling plants water needs. In March, May and July crop water requirement is greater than the mainstay discharge, then a simulation done by allocation of planting schedule that is 5 group for rice planting and 3 group for crops planting.The results showed that planting schedule can reduce the value of the maximum water deficit in the existing condition that is 0.36 m3 / s to 0.041 m3 / s or decreased 88.61%, but the deficit is still occurs. So it is necessary to do a Long Storage planning with 2000m long, width 5m and 5m depth with a land area of 1.2 hectares which function as water reservoir that can be used to fulfilling the crops water needs on dry meteorological conditions.Keywords: Sei Paku Irrigation Area, water deficit, water balance, critical discharge, weirs, and long storage
Analisis Laju Infiltrasi Pada Sub Das (Daerah Aliran Sungai) Siak Kota Pekanbaru (Studi Kasus: Das Senapelan Dan Das Sago) Muhammad Habsyie Ravie; Siswanto Siswanto; Trimaijon Trimaijon
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Pekanbaru city development is experiencing rapid development due to population and economic growth, this has made land use become more dense. The construction of a dense infrastructure makes the process of infiltration or absorption of water into the ground slower. As a result of the development of infrastructure, the surface runoff is large and can cause flooding. An infiltration rate study was conducted to be used as a reference for conservation measures and overcome the problem of magnitude of surface runoff. Infiltration rate measurement using a double ring infiltrometer and Horton equation analysis method is performed to determine the infiltration rate. Measurement of infiltration rate in the field is based on procedures in SNI 7752: 2012. Calculation of infiltration rate analysis aims to determine the value of infiltration capacity and infiltration rate in the area under study. At the 6 research location points, the largest infiltration capacity at the research site 2 was 90 mm / hour and the smallest infiltration capacity at the research site 3 and 6 was 30 mm / hour. Infiltration rate analysis using the Horton equation method obtained the highest infiltration rate at study point 2 which is 76.38 mm / hour and the lowest infiltration rate at research point 6 is 18 mm / hour. Classification of infiltration rate was conducted based on the analysis of the total infiltration volume, the largest value was at point 4 at 27.46 mm with a constant decrease time at 1.67 hours and the smallest infiltration volume value was at point 6 at 12.73 mm with a time of constant decrease at 1.17 hours. Based on the U.S. Soil Conservation, at 6 testing points has infiltration rate which is rather slow and moderate.Keywords: infiltration, horton’s method, surface runoff
Pola Gerusan Lokal Pada Model Pilar Jembatan Lingkaran Ganda (Double Circular) M Tony Iskandar; Mudjiatko Mudjiatko; Trimaijon Trimaijon
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Pillar of the bridge on the stream causes changes flow patterns and local scour. Local scour will decrease the power of pillar to sustaining bridge load. Laboratory model was conducted to determine the model of local scour phenomena double circular pillar with or without protector curtain type. Basic canal model is using kampar sand with grain size d35 = 0,285 mm, d50 = 0,330 mm and d65 = 0,380 mm and spesific weight is 2,64.Froude number that used is Fr1=0,464, Fr2=0,670 and Fr3=0,769. Reynold number Fr1 scored 1658,42 is classified as transitional flow, Fr2 scored 3081,68 and Fr3 scored 4381,19 is classified as turbulent flow. Shield shows the use of gradation in moving zone. Hydrodynamic flow in pillar causes down flow that showed by scour in upstream pillar. Scour rech the equilibrium stage at minute 75. The ratio of scour depth ds/b is range from 0,03 – 0,46. The use of swivel can reduce the scours depth until 44,44%. Sediment transport analysis prove that the higher Froude is used the bigger the granules  are transported.  Key word  : scour, model laboratory, double circular, froude, reynold, Shields, hydrodynamic flow, sediment transport .
Analisis Tingkat Laju Infiltrasi Pada Sub Daerah Aliran Sungai (DAS) Kampar Outlet Rimbo Panjang Septria Dwi Hawari; Siswanto Siswanto; Trimaijon Trimaijon
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Infiltration is the process of entry of rainfall or surface water into the soil (subsurface) through the gap or pore space of the soil. The infiltration process is a very important part of the hydrological cycle which greatly affects the amount of water that is on the surface of the soil. In the area Rimbo Panjang-Pekanbaru has experienced changes in land use due to infrastructure development. Infiltration on each land use varies if the nature or type of soil is different. The instrument used to measure infiltration in the field is the double ring infiltrometer and the analytical method use the Horton method. Procedures for measuring infiltration rates in the field using SNI 7752:2012. Data obtained from the field in the form initial infiltration rate and constant infiltration rate. The results of the actual reduction data obtained the largest decrease of 7,2 cm and the smallest decrease of 0,1 cm. The largest initial infiltration capacity is 165 cm/hours and the smallest initial infiltration capacity is 3 cm/hours. The largest infiltration rate 152 cm/hours and the smallest infiltration rate 2,68 cm/hours. In the Rimbo Panjang-Pekanbaru area, the infiltration rate is in the slow, moderate and very fast class with the highest total volume value of 708,81 mm in the 2,75 hours and the smallest total infiltration volume valume 9,93 mm in 1 hour. Keywords: Infiltration, Horton Method, Subsurface Runoff
Co-Authors Abdul Rasyid Aminuyati Andreas Panjaitan Aprian Harza Bangun Aldilla Rachman Fahrul Iswar Fauzi, Manyuk FERI SETIAWAN Ferry Fatnanta Imam Suprayogi Imam Syafni L Lukman Nul Hakim M Tony Iskandar Mudjiatko Mudjiatko Muhammad Habsyie Ravie Pandu Hudiiasto Rezky Ardillah S.Pd. M Kes I Ketut Sudiana . Septria Dwi Hawari Sudarmanto Sudarmanto