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All Journal Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain
Dyah Indriana Kusumaastuti
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Civil Engineering, Building, Construction & Architecture Other

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Analisis Erosi Dan Sedimentasi Waduk (Studi Kasus Waduk Way Jepara Kabupaten Lampung Timur) Nengah Sudiane; Dyah Indriana Kusumaastuti; Afandi .
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 16, No 2 (2012): Edisi Agustus 2012
Publisher : UNIVERSITAS LAMPUNG

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Dam and irrigation channels are utilized to supply irrigation in Way Jepara area. Way Jeparacannot optimally function because the catchment area is disturbed by illegal logging which mayincrease erosion rate as well as sedimentation to the dam. This research aims to analyze erosionwhich occurs in the catchment area and sedimentation in the dam. Erosion prediction model usedin this study is USLE (Universal Soil Loss Equation). From the analysis it is obtained that totalerosion (A) in the catchment area is 2307.01 ton/year or 156.41 ton/ha/year which is classified aserosion class III or medium. The highest erosion rate, 1552.63 ton/ha/year, occurs in Land UnitNo. 107 near Langkap Mountain which is classified as severe. From the analysis the problemsarose can be categorized into two groups, problem related to catchment area conservation andtechnical l problem directly related to the dam. Solution to the problems should be based onconservation as well as social welfare.
Evaluasi Pelaksanaan Tugas Pembantuan Operasi Dan Pemeliharaan (TP-OP) Jaringan Irigasi Pada Satker Dinas Pengairan Dan Pemukiman Provinsi Lampung Tahun Anggaran 2009 Dan 2010 Zaldi Ronald; Dyah Indriana Kusumaastuti; Sumiharni .
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 16, No 2 (2012): Edisi Agustus 2012
Publisher : UNIVERSITAS LAMPUNG

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The evaluation of the execution of TP-OP of the irrigation system on working unit of irrigationand settlement agency of Lampung province in 2009 and 2010 is reviewed from the aspect of itsestimation and execution to give an illustration of the performance of the working unit with sourceof funds in APBN. In 2009 the budget estimation is Rp. 20.566.050.000 and in 2010 with thebudget estimation is Rp. 21.937.120.000, whicht each year has different problem and situation.This is proven by the absorb total budget estimation which is only 83,98% in 2009 and 97,75% in2010. The distinction of the problem and situation faced by working unit in every fiscal year willgive positive and negative impact which will be analyzed for the sake of a sustainableimprovement for TP-OP program.
Analisis Sedimentasi di Sungai Way Besai Ofik Taufik Purwadi; Dyah Indriana Kusumaastuti; Astika Murni Lubis
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 20, No 3 (2016): Edisi Desember 2016
Publisher : UNIVERSITAS LAMPUNG

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Way Besai River's catchment area is used as agricultural, tourism, and hydroelectrica power plant (PLTA) purposes. PLTA Way Besai was built for generating electrical power using the height of a waterfall from Way Besai River, however nowadays PLTA Way Besai is having a decrease of electrical power because of the now happening drought. The power decrease reached until 40 MW while it used to have 90 MW power supply causing only a rough 50 MW energy power left to be operated. The metode that is used in estimating the value of sediment discharge is by using the Universal Soil Loss Equation (USLE) method and Measured Sediment Analysis. From the analysis results, the overall value of sediment was attained by merging the value of suspended load and bed load which is 170528,443 m 3 /year. The value of seddiment that is attained from USLE methode is 105520,738 m 3 /year.
Pengaruh Interval Waktu Data Curah Hujan dalam Analisis Intensitas Durasi Frekuensi di Provinsi Lampung Mardiyansyah Mardiyansyah; Ahmad Zakaria; Dyah Indriana Kusumaastuti
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 23, No 2 (2019): Edisi Agustus 2019
Publisher : UNIVERSITAS LAMPUNG

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Abstract

in a reservoir or river, it is necessary to know the size of the flood discharge plan used as a basis for calculating the size of the canals and their complementary buildings. Troubleshooting using Hydrological analysis, Intensity Duration Frequency (IDF) requires frequency analysis using a series of data obtained from rain data records. The scope of this research covers the area of Lampung Province, namely BMG Radin Inten II station and BMG Maritim Panjang station. From the comparison of the IDF curve analysis between rainfall data for short time intervals and daily rainfall data, the percentage difference between rainfall intensity differences in each duration and at certain return periods is obtained. IDF Curve Analysis for Daily Rain Data uses the Mononobe method, from the results of IDF curve analysis between rainfall data for short time intervals with daily rainfall data at BMG Radin Inten II station there is a difference in the ratio of high intensity up to 3 times or > 300%, whereas in BMG Maritim Panjang station only the difference in ratio > 100%.
Co-Authors Afandi . Ahmad Zakaria Astika Murni Lubis Mardiyansyah Mardiyansyah Mega Astriyana Muhammad Jazuli Mustofa Nengah Sudiane Ofik Taufik Purwadi Ofik Taufiq Purwadi Sumiharni . Yuda Romdania Zaldi Ronald