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All Journal Jurnal Ilmiah Poli Rekayasa
Sadtim Sadtim
Politeknik Negeri Padang
Education

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Studi Penentuan Nilai Koefisien Pengaliran DAS Batang Arau di Kota Padang Fitri Handayani -; Rahmania Hardiyenti -; Indra Agus -; Sadtim - -; Hartati - -
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (447.952 KB) | DOI: 10.30630/jipr.15.2.167

Abstract

Batang Arau river is located 0048” up to 0056” SL (South Latitude) and on 100021” up to 100033” LE (Longitutede East), and upstream part water catcment area it is cover 30,90 km2 area. The above said catchment area is a region consist of densely .populated and also dominated by vegetation of natural forest, protected forest, people’s forest, mixed forest, farm, recefield and yard. Based on site observation, most of the forest has changed become residant farms and settlement. This condition can be shown by land use map and change of runoff which was change from year to year. With this land use change however will also affecty changing of runoff coefficient. The goals of this study is to get flow coefficient (c) based on land use coefficient, debit AWLR, and based on SWAT application. Calculation of the coefficient based on land use map until be done by Arcgis method, debit AWLR using Hasper method and SWAT application. Study shown in period between 2009 – 2017, coefficient flow result is in range 0,36 – 0,37. Flow coefficient using AWLR result is in range 0,36 – 0,37, while flow coefficient using SWAT method is 0,25 – 0,36
EVALUASI KAPASITAS PENAMPANG CHECK DAM I GUNUNG NAGO TERHADAP DEBIT BANJIR sadtim sadtim; Wisafri Wisafri; Angga Putra Arlis; Ridho Wafiq Fauzan
Jurnal Ilmiah Poli Rekayasa Vol 21, No 2 (2026): April
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.2.436

Abstract

Padang City, the capital of West Sumatra Province, has complex topographical conditions that increase its susceptibility to flooding, particularly during periods of high rainfall intensity. One of the flood control infrastructures constructed along the Batang Kuranji River is Check Dam I Gunung Nago, which functions to reduce flood discharge and sediment transport. This study aims to evaluate the hydraulic capacity of the check dam cross-section in accommodating planned flood discharge under various return periods. The research methodology involved the collection and analysis of topographic, hydrological, and 15-year rainfall data obtained from the Gunung Nago and Ladang Padi rainfall stations. Design rainfall was analyzed using Normal, Gumbel, Log Normal, and Log Pearson Type III probability distributions, followed by goodness-of-fit tests employing the Chi-Square and Smirnov-Kolmogorov methods. Planned flood discharge was estimated using the Rational, Hasper, and Weduwen methods, as well as Snyder and Nakayasu synthetic unit hydrographs. The results indicate that the existing cross-section capacity of Check Dam I Gunung Nago is only capable of safely accommodating flood discharge with a return period of up to five years. Consequently, structural capacity enhancement and flood mitigation measures are necessary to improve the effectiveness of the check dam in flood management.
Co-Authors -, Hartati - Angga Putra Arlis Fitri Handayani - Indra Agus - Rahmania Hardiyenti - Ridho Wafiq Fauzan Wisafri Wisafri