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Review Sistem Drainase Parak Jambu Dadok Tunggul Hitam Padang Menggunakan Model EPA-SWMM Mera, Mas; Februarman, Februarman; Aryadwitama Priadi, Fandi
Jurnal Bangunan, Konstruksi & Desain Vol 2 No 2 (2024): Juni 2024
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbkd.2.2.85-96.2024

Abstract

Flood disasters have been a never-ending problem for humans all over the world from the past to the present. This disaster can be caused by natural events or as a result of human activities and even by both simultaneously. One of the areas that often experiences flooding is the Parak Jambu Area, Dadok Tunggul Hitam Village in Padang City. This research objective is to overcome flooding that occurs in the area by means of numerical simulation using the EPA SWMM v.5.2 model. The existing conditions consist of 6 subcatchments in the Parak Jambu Area plus 28 supporting subcatchments located outside the area. All of them consist of 281 conduits (canals). The results of the simulation of existing conditions show that 32 canals are flooded and 6 canals do not carry any water at all. In dealing with the flooding that occurred, two approaches are taken, namely modifying the dimensions of the existing channels and adding new channels to the edge of the existing catchment. The simulation results of modified conditions show that there are no more canals that experience flooding in the Parak Jambu Area, and canals that previously did not carry water, now carry water.
Dampak Kolam Retensi Seri Terhadap Puncak Banjir Daerah Aliran Batang Kuranji Februarman, Februarman; Daoed, Darwizal; Syahputra, Aldino
Jurnal Bangunan, Konstruksi & Desain Vol 2 No 2 (2024): Juni 2024
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbkd.2.2.113-123.2024

Abstract

Flooding is a natural phenomenon in the form of water inundating land and can cause harm to humans. Floods can be caused by high rainfall, limited riverbed capacity, and topography and drainage conditions. One of the rivers that causes flooding in the city of Padang is the Batang Kuranji (Kuranji River), especially in the downstream part. Therefore, an environmentally friendly flood control system is needed that can reduce flood peaks downstream, namely by creating several retention ponds. This research was conducted to examine the effect of serial retention ponds on reducing flood peaks in the middle section of Batang Kuranji. Retention ponds are placed on the left and right sides of the river on the section from the Gunung-Nago weir to the Kuranji Bridge on the Padang-Bypass road. The estimated flood discharge in the Gunung-Nago Sub-watershed is 547 m3/s for a 10-year return period with a watershed area of ​​124 km2. The series retention pond simulation appears to be very effective in reducing peak flood discharge by 52% with a pond area of ​​0.8 million m3. Even though the return period is 100 years, the effectiveness percentage is 34%. Suggestions to stakeholders so that the pond can function properly require regular maintenance and dredging,
Upaya Mengoptimalkan Bandar Lurus Sebagai Saluran Drainase Utama Kawasan Air Pacah Kota Padang Februarman, Februarman
Jurnal Bangunan, Konstruksi & Desain Vol 2 No 4 (2024): Desember 2024
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbkd.2.4.223-232.2024

Abstract

Almost every year, floods occur that inundate several areas in Padang City, one of which is the Air Pacah Area. Based on field observations, waterlogging occurs because the drainage channel network is unable to drain the water discharge that burdens it. This can occur due to narrowing, shallowing, garbage blockages and limited dimensions of the channel. This study aims to determine the water level elevation that occurs in the middle section of Bandar Lurus for the planned discharge of 10-year and 25-year return periods using HEC-RAS software. Based on rainfall data and channel geometry obtained from the Water Resources and Construction Service of West Sumatra Province, and with a catchment area of ​​Bandar Lurus of 9.82 km2, the planned flood discharge values ​​for 10-year and 25-year return periods are 46.53 m3/s and 66.48 m3/s respectively. The results of the HEC-RAS simulation, for both discharge values, indicate that there will be an overflow along the middle section of Bandar Lurus, the flow of which will burden the Bandar Maransi channel and the box culvert located near the Siti Rahmah Islamic Hospital. To avoid flooding in the Air Pacah area, it is necessary to accelerate the normalization of the middle section of Bandar Lurus so that the resulting flow does not burden other channels.
Investigasi Banjir Pada Perumahan Safa dan Marwa Dalam Realitas dan Model Mera, Mas; Givi, Muhammad; Februarman, Februarman; Daulay, Agra
Jurnal Rekayasa Sipil Vol. 17 No. 2 (2021)
Publisher : Civil Engineering Departement, Andalas University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrs.17.2.176-185.2021

Abstract

Penelitian ini adalah tentang pengujian kapasitas drainase di kompleks perumahan yang berada di daerah topografi yang relatif datar. Oleh karena itu, dipilihlah perumahan Safa dan Marwa yang terletak di Lubuk Minturun, Kecamatan Koto Tangah, Kota Padang, Sumatera Barat sebagai studi kasusnya. Kompleks perumahan ini telah sering mengalami banjir bila hujan turun dengan intensitas melebihi 20 mm/jam dan dengan lama hujan melebihi 3 jam. Kemudian program jadi (existing software) “EPA Storm Water Management Model (SWMM) versi 5.0” digunakan untuk mensimulasikan kasus ini, di mana hasilnya dibandingkan dengan realitas yang terjadi di lapangan. Data primer yang diperlukan oleh model SWMM ini adalah sub-catchment, intensitas hujan, kemiringan dan dimensi saluran drainase. Hasil simulasi menunjukan hal yang sama yang terjadi di lapangan yaitu 4 dari 37 junction (persimpangan saluran) dan 6 dari 38 conduit (ruas saluran) mengalami banjir. Sehingga hasil simulasi model SWMM ini dapat dipercaya untuk menunjukkan realitas banjir yang terjadi di lapangan.
Reducing Bandar-Lurus Flow-Velocity To Minimize Erosion of Batang-Kurao Riverbank, Padang Februarman, Februarman; Mera, Mas; Ginawa, Dega
JURNAL TEKNIK SIPIL Vol 14, No 1 (2025): Volume 14 Nomor 1 Mei 2025
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v14i1.42180

Abstract

The Bandar-Lurus River empties into the Batang-Kurao River at an almost perpendicular confluence. As a result, when the Bandar Lurus flowed the 2021-August-18 flood-discharge, for example, the Kurao river-bank collapsed. If this is allowed to last longer, then the resident houses near the river bank could be damaged. The flow velocity is predicted using the Manning formula, and the resistance coefficients are averaged using the Einstein-Banks formula. Both formulas are then solved using the Newton-Raphson method on the MS Excel platform. The objective of this study is to slow down the Bandar downstream velocity of the as slowly as possible to minimize damage to the Kurao river-bank. The first step is to lower the longitudinal slope of the Bandar bed from 0.0012 to 0.0007. As a result, the downstream velocity is expected to slow down from 1.85 to 1.68 m/s, and the water level is also estimated to drop from 6.79 to 5.98 m. The next step is to replace the Bandar-bed material from the ground with irregular sharp-rock fragments. Consequently, the velocity is expected to slow down from 1.68 to 1.19 m/s, but the water level is estimated to rise from 5.98 to 6.94 m. This is the Bandar velocity that can be engineered considering that the channel-top elevation in the downstream is only 8.24 m including the freeboard.