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Heri Muda Setiawan
Universitas Jambi
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Analisis Spasial Terhadap Tingkat Kerawanan Banjir DAS Kenali Kecil Menggunakan Metode SNI 8197:2015 Heri Muda Setiawan; Heri Junedi; Mohd Zuhdi
Jurnal Ilmiah Universitas Batanghari Jambi Vol 22, No 1 (2022): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v22i1.1990

Abstract

Floods are the most common disasters in almost all places, including Indonesia and Jambi City in particular. Areas that are directly exposed to the threat of flooding are in the Watershed. Land conversion is one of the causes of flooding in the Kenali Kecil watershed. This study uses the standard SNI 8197:2015 regarding the Flood Hazard Mapping Method 1:50,000 and 1:25,000 scale. The approach used is landscape analysis, which emphasizes the process of forming natural systems on the earth's surface. This study aims to analyze and produce a map of the level of flood vulnerability in the Kenali Kecil watershed area. The data needed in this study are ten days of rainfall data, slope data and land cover data. Slope data was obtained from DEMNas data processing and land cover data was obtained from manual digitizing of Google Earth's High-Resolution Satellite Imagery data. Data processing uses ArcMap software with scoring and overlay techniques. The results showed that the Kenali Kecil watershed had a dendritic pattern with an area of 15.68 km2 and located in 5 villages, namely: Bagan Pete, Kenali Besar, Penyengat Rendah, Mendalo Darat and Pematang Gajah. The basic rainfall of the Kenali Kecil watershed is 204.21 mm, the slope is mostly >4% and the land cover is mostly residential. Based on the SNI 8197:2015 procedure and the results of the scoring and overlay process with ArcMap, the flood susceptibility level of the Kenali Kecil watershed is at a medium hazard level of 8.25 km2 (52.6%) and a height of 7.43 km2 (47.4%).
Analisis Dan Simulasi Banjir Das Kenali Kecil Dengan Menggunakan Sig Dan Model Hidraulika Hec-Ras Heri Muda Setiawan; Heri Junedi; Moch Zuhdi
Jurnal Pembangunan Berkelanjutan Vol. 5 No. 1 (2022): Jurnal Pembangunan Berkelanjutan
Publisher : Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jpb.v5i1.18624

Abstract

Floods are the most common disasters in almost all places, including Indonesia and Jambi City in particular. Areas that are directly affected by the threat of flooding are in the Watershed. Kenali Kecil watershed is one of the sub- watersheds of Batanghari which is administratively located in Jambi City and Muaro Jambi Regency. The Kenali Kecil watershed is influenced by the rapid growth of Jambi City. Land conversion is not the only cause of flooding in the Kenali Kecil watershed. Floods also occur because the discharge/volume of water flowing in a river or drainage system exceeds its drainage capacity. This study analyzes the level of flood vulnerability based on SNI 8197:2015 and Head of BNPB Regulation No. 02 of 2012. The approach used in the SNI method is landscape analysis which emphasizes the process of forming natural systems on the earth's surface. Analysis of the level of flood vulnerability based on the Regulation of the Head of BNPB is based on the results of flood simulations using the HEC-RAS hydraulic model. The parameters used in this model are the manning’s coefficient, data geometry, discharge plan and terrain. The terrain used in this research is DEMNas. Discharge plan are obtained using the HEC-HMS application. In making the discharge plan, rainfall data for the last 10 years is needed, to get the CN and Impervious values, soil type maps and land use maps are needed. Based on the procedure of Indonesian National Standard (SNI) 8197:2015) the level of flood vulnerability in the Kenali Kecil watershed is in the medium level of 8.25 km2 (52.6%) and high level of 7.43 km2 (47.4%). Based on the HEC-RAS modeling for the 2-year return period (Q2), the flood area is 1.08 km2, the 5-year return period (Q5) is 1.2 km2 and the 10-year return period (Q10) is 1.3 km2. Based on the Regulation of the Head of BNPB No. 02 of 2012 the flood vulnerability level of the Kenali Kecil watershed is in the low level (<0.76) Q2 = 0.33 km2, Q5 = 0.31 km2, Q10 = 0.32 km2, medium level (0.76 – 1 ,5) Q2 = 0.32 km2, Q5 = 0.31 km2, Q10 = 0.34 km2 and high level (> 1.5) Q2 = 0.43 km2, Q5 = 0.58 km2, Q10 = 0.64 km2
Co-Authors Heri Junedi Heri Junedi Moch Zuhdi Mohd Zuhdi