Dwi Joko Winarno
Jurusan Teknik Sipil Fakultas Teknik Universitas Lampung Jl. Sumantri Brojonegoro No.1 Bandar Lampung.

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Analisis Hidrologi Untuk Penentuan Debit Banjir Rancangan di Bendungan Way Besai Nivitha, Mutya; Winarno, Dwi Joko; Kusumastuti, Dyah Indriana
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 1 (2018): Edisi Maret 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i1.791

Abstract

AbstractResource which is often used for energy source is water as hydro power plant. One of hydro power plant in Lampung province is Way Besai Hydro Power Plant. Considering the importance of this hydro power plant for people, extreme things on the hydro power plant like flood, certainly not desirable. Hydrologic analysis required for get result that was flood design as action anticipation.This study was conducted in Way Besai watershed, Sumber Jaya, West of Lampung. The data required of this study are rainfall data from five stations, flow Way Besai data from 1986 to 2000, and daily rainfall data from two station.From frequency analysis, obtained design flood for the largest single data group return period of 2 years is return period 5 years 131,00 m3/s, return period 10 years 178,42 m3/s, return period 25 years 253,71 m3/s, return period 50 years 322,66 m3/s, return period 100 years 403,45 m3/s, and 499,81 m3/s for return period 200 years. From HEC-HMS, the flood design for return period 2 years sebesar 71,2 m3/s, return period 5 years 90,6 m3/s, return period 10 years 105,7 m3/s, return period 25 years 128,6 m3/s, return period 50 years 156,6 m3/s, return period 100 years 190,8 m3/s and 233,7 m3/s for return period 200 years. Based on calibration result used RMSE, obtained RMSE value is 3,12. Keywords: watershed, design flood, Way Besai, HEC-HMS
Analisis Hidrograf Satuan Terukur (HST) Sedimen Sungai Air Anak dan Sungai Talang Bandung Putri, Wardatul Aini; Winarno, Dwi Joko; Kusumastuti, Dyah Dindriana
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 2 (2018): Edisi Juni 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i2.831

Abstract

ir Anak River and Talang Bandung River is upstream of the Way Besai River that is the largest in West Lampung District. Problems which often occur in the upstream region is land erosion causing sedimentation. The purpose of this study : to analyze the hydrograph measured units, to determine the sediment rate and determine the amount sediment HST Air Anak River and Talang Bandung River.The location of this research was conduced in the Air Anak watershed and Talang Bandung watershed, Sumber Jaya district, Lampung Barat. Data required in this study is automatic rainfall and suspended sediment data.From the result of the measurement unit hydrograph analysis Air Anak watershed and Talang Bandung watershed average sediment obtained in Air Anak watershed in a 10 minutes of 28,068 ton/tahun, 30 minutes period of 24,875 ton/tahun an a 60 minutes period of 23,9047 ton/tahun. While at Talang Bandung watershed period 10 minutes 26,0315 ton/tahun, 30 minutes period of 25,3898 ton/tahun and 60 minutes period of 26,903 ton/tahun. Keywords : HST sedimentation, DAS Air Anak, DAS Talang Bandung. AbstrakSungai Air Anak dan Sungai Talang Bandung merupakan bagian hulu dari Sungai Way Besai yang merupakan sungai terbesar di Kabupaten Lampung Barat. Permasalahan yang serimg terjadi di daerah hulu adalah masalah erosi yang menyebabkan terjadinya sedimentasi. Adapun tujuan dari penelitian ini yaitu : untuk menganalisis Hidrograf Satuan Terukurnya, mengetahui besarnya laju sedimentasi dan mengetahui besarnya HST sedimen Sungai Air Anak dan Sungai Talang Bandung. Lokasi penelitian ini dilakukan di DAS Air Anak dan DAS Talang Bandung, Kecamatan Sumber Jaya, Kabupaten Lampung Barat. Data yang diperlukan dalam penelitian ini adalah data curah hujan otomatis dan data sedimen suspended. Dari hasil analisis Hidrograf Satuan Terukur (HST) Sedimen rerata yang didapat pada DAS Air Anak pada periode waktu 10 menitan sebesar 28,068 ton/tahun, periode waktu  30 menitan sebesar 24,875 ton/tahun dan periode waktu 60 menitan sebesar 23,9047 ton/tahun. Sedangkan pada DAS Talang Bandung periode waktu 10 menitan sebesar26,0315 ton/tahun, periode waktu 30 menitan sebesar 25,3898 ton/tahun dan periode waktu 60 menitan sebesar 26,903 ton/tahun.Kata kunci:HST sedimen, DAS Air Anak, DAS Talang Bandung.
Sediment Analysis in the Way Besai Hydroelectric Watershed Using the USLE Method (United Soil Loss Equation) Rahmawati, Fitriya; Winarno, Dwi Joko; Kusumastuti, Dyah Indriana
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 4 (2018): Edisi Desember 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i4.1018

Abstract

Way Besai hydropower station is located in Way Besai river basin (watershed) with most watersheds surrounded by mountains that cause erosion resulting in sediment buildup. The purpose of this research is to know the degree of erosion hazard and to know the sediment by the Universal Soil Loss Equation (USLE) method in Way Besai Watershed. The location of this research was conducted at Way Besai Sub River Watershed, Tulang Bawang Watershed, West Lampung Regency with Way Petai as the control point. The data needed in this research is the limitation of Way Besai Watershed catchment, land use data and land type at Way Besai Watershed catchment area. From the result of sedimentation analysis with USLE method, it can be known that the erosion rate of Way Besai Watershed catchment area is 305.03 ton/ha/year which is classified as Class IV Hazard Erosion or heavy and sedimentation of Way Besai Watershed catchment area is 165.079,13 ton/year.
Analisis Perbandingan Hidrograf Satuan Sintetik Gama I dan SCS (HEC-HMS) dengan Hidrograf Satuan Terukur di Sungai Way Besai Sembiring, Fadhel Dzaki; Kusumastuti, Dyah Indriana; Winarno, Dwi Joko
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 7 No. 1 (2019): Edisi Maret 2019
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v7i1.1117

Abstract

The Way Besai River is located in Sumber Jaya District, West Lampung Regency. River discharge is an indicator of watershed function in transforming rain into stream flow. River discharge is generally presented by hydrograph. There are two methods to derive unit hydrograph, i. e. Measured Unit Hydrograph method (HST) and Synthetic Unit Hydrograph method (HSS). Synthetic Unit Hydrograph is used if the watershed does not have sufficient hydrometry data for calculating flood discharge. The purpose of this study is to analyze Synthetic Unit Hydrograph Gama I, Synthetic Unit Hydrograph SCS (HEC-HMS), and measured unit hydrograph for Way Besai River. The method used in this study includes Synthetic Unit Hydrograph Gama I, Synthetic Unit Hydrograph SCS (HEC-HMS), and Measured Unit Hydrograph. The results of this study show that Unit Hydrograph derived from Synthetic Unit Hydrograph SCS (HEC-HMS) is better than the result derived from Synthetic Unit Hydrograph Gama I based on peak discharge, peak time, base time and base flow values. Keywords: Watershed, Discharge, Synthetic Unit Hydrograph, Measured Hydrograph Unit, SCS (HEC-HMS), Gama I.