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All Journal Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain Journal of Sustainable Civil Engineering (JOSCE) Jurnal Komposit : Jurnal Ilmu-Ilmu Teknik Sipil Aptekmas : Jurnal Pengabdian Kepada Masyarakat
Sumiharni Sumiharni
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Analisis Kapasitas Saluran Drainase Di Jl. Kartini Kecamatan Tanjung Karang Pusat Kota Bandar Lampung Maulana, Sugeng Haris; Sumiharni, Sumiharni; Purwadi, Ofik Taufik; Mariyanto, Mariyanto
Jurnal Rekayasa Sipil dan Desain Vol 11, No 2 (2023): Edisi Juni 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

The Bandar Lampung area which is quite routinely hit by floods is in Tanjung Karang Pusat District, the Jl. Wolter Monginsidi to Jl. Kartini. The reason is the high rainfall, as well as the curved road conditions and the performance of the drainage channel that is not optimal enough to accommodate the water discharge before carrying it to the Way Awi river which is on the road. The option that can be taken to reduce the risk of flooding is by evaluating the drainage channels on the road, taking into account the capacity of the drainage channels so that they are able to accommodate the flood discharge through them. The design discharge is calculated using hydrological analysis, rational methods, and based on maximum rainfall data for the last 10 years. For channel discharge capacity is calculated using hydraulics analysis and Manning's formula. The results of the analysis of the existing discharge capacity in most of the drainage channel segments are still able to accommodate the planned discharge with a 5-year return period of rain, so there is no need to increase the dimensions, except for segment 4, because the existing drainage capacity (Qs) is 0.700 m3/s smaller than design discharge (Qr) 1,238 m3/s. These conditions require the need to increase the dimensions of the drainage channel in order to accommodate the discharge through it.  Key words : drainage, hydrological analysis, hydraulic analysis, flooding.
EVALUASI SISTEM DRAINASE KABUPATEN PRINGSEWU (Studi Kasus : Desa Wates Kecamatan Gadingrejo Kabupaten Pringsewu) Dermasani, Akmal; Febrina, Rina; Sumiharni, Sumiharni
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil  Vol. 3 No. 2 (2019)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v3i2.3680

Abstract

ABSTRAkSistem drainase didefinisikan sebagai serangkaian bangunan air yang berfungsi untuk mengurangi dan atau membuang kelebihan air dari suatu kawasan atau lahan. Penelitian  ini dilakukan di jalan lintas barat desa wates kecamatan gadingrejo, pada pelaksanaannya dilakukan analisis hidrologi dan hidrolika. Analisis hidrologi menggunakan data curah hujan maksimum setelah itu dilakukan pengukuran dispersi melalui perhitungan parameter statistik. Dilanjutkan dengan pemilihan jenis distribusi untuk mendapatkan cara mengolah data pengukuran  curah  hujan  rencana  dan  perhitungan  intensitas  hujan.  Analissis  hidrolika  berupa debit drainase rencana, setelah itu di tentukan rencana dimensi yang sesuai.Hasil penelitian berdasarkan pengukuran dispersi diperoleh distribusi Log Pearson  III  dan  diperoleh  nilai  curah  hujan  rencana  untuk  kala  ulang  2 tahun  sebesar 345,143 mm, dan untuk  kala  ulang  5 tahun  sebesar 407,380 mm. Nilai debit hujan untuk kala ulang  2 tahun dengan metode rasional diperoleh nilai 2,815 m3/detik, dan kala ulang  5 tahun 3,322  m3/detik. Berdasarkan evaluasi pada kondisi eksisting pada segmen 1 sampai segmen 7 terdapat dimensi yang disarankan untuk dilakukan redesain yaitu pada segmen 3, dengan dimensi untuk kala ulang 2 tahun yaitu b = 1,50 m x h = 1,50 m, dan kala ulang 5 tahun dengan dimensi b = 1,80 m x h = 1,80 m sehingga saluran drainase mampu untuk menampung debit banjir.Kata kunci: analisis hidrologi, sistem drainase, distribusi Log Pearson III, debit rencana, dimensi saluran.ABSTRACTDrainage system is defined as a series of water structures that function to reduce and or remove excess water from an area or land. This research was conducted on the western causeway of Wates village, Gadingrejo sub-district. The hydrological and hydraulics analysis was performed. Hydrological analysis uses maximum rainfall data then the measurement of the dispersion is carried out through the calculation of statistical parameters. The stage was followed by selecting the type of distribution to get a way to process the planned rainfall measurement data and calculation of rain intensity. The hydraulic analysis in the form of planned drainage discharge, after which the appropriate dimensional plan is determined. The results of the study based on dispersion measurements obtained by Log Pearson III distribution and the value of the rainfall plan for the 2 year reiterative period was 354,143 mm, and for the 5 year reiterative period was 407,380 mm. The rain discharge value for the 2 year reiterative period using the rational method was 2,815 m3 / second, and the 5 year reiterative period was 3,322 m3 / second. According to the evaluation on the existing conditions in segment 1 to segment 7, there are dimensions that are suggested to be redesigned, namely in segment 3, with dimensions for a 2 year reiterative period, namely b = 1,50 m x h = 1,50 m, and a 5 year reiterative period with dimensions b = 1,80 m x h = 1,80 m so that the drainage channel is able to accommodate the flood discharge.Keywords: hydrolical analysis, drainage system, Pearson III log distribution, discharge, channel dimension.
Co-Authors Agung Abadi Kiswandono Ahmad Zakaria Amril Ma'ruf Siregar Andika Pratama Ashruri Ashruri Damar Adi Perdana Dermasani, Akmal dheni saputra jp Gatot Eko Susilo Heni Siswanto Iswan Iswan Karina H Ananta Mariyanto Mariyanto Maulana, Sugeng Haris Munaris . Nining Wahyuni Ofik Taufik Purwadi Ofik Taufik Purwadi, Ofik Taufik Rina Febrina Rina Febrina, Rina rizki abadian nur Rizki Lazuardi Prasetio Sejati, Septias Herson Yulia Kusuma Wardani