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All Journal Jurnal Ilmiah Rekayasa Sipil Jurnal Abdimas: Pengabdian dan Pengembangan Masyarakat
Indra Agus
Politeknik Negeri Padang
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Analisis Kapasitas Penampang Sungai Batang Mahat Terhadap Besaran Debit Banjir Menggunakan Pendekatan Model Matematik Dalrino Dalrino; Sadtim Sadtim; Hartati Hartati; Indra Agus
Jurnal Ilmiah Rekayasa Sipil Vol 15 No 2 (2018): Edisi Oktober 2018
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (772.907 KB) | DOI: 10.30630/jirs.15.2.124

Abstract

Batang Mahat watershed has a total area of 772.87 km2 with a total length of the main rivers around 44.06 km. With the topographic condition on the upstream side was a mountainous terrain and steep slope relatively into downstream. The problem was can be classified as river siltation, narrowing of the river, and riverbank erosion that has caused flood and threaten a public facilities. Numerical simulations using the application of the HEC RAS model were conducted to determine the capability of the river storage capacity into various discharge values. The results of the analysis show that with the discharge condition Q2 there has been flood caused by the high surface elevation of water that was overtopping of the left and right embankments elevation at the upstream and midstream areas. The water surface elevation will increase with the increasing of flood discharge. River normalization efforts with additional depth and widening of river channel were recommended.
Scour Depth Estimation on Abutment With HEC RAS and Some Empirical Equation Indra Agus; Munafri Alwys; Wisafri Wisafri; Dalrino Dalrino; Noftar Yolanda; Welfi yani
Jurnal Ilmiah Rekayasa Sipil Vol 17 No 1 (2020): April 2020
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1005.876 KB) | DOI: 10.30630/jirs.17.1.271

Abstract

Toe Scour around abutment will be very dangerous and cause loss of stability on the bridge. The case of structure failure on Batang Kalu bridge in Korong Pasa Usang Nagari Kayu Tanam, Padang Pariaman Regency on Monday (10 December 2018) is a clear example of toe scouring. A case study of toe scour was on the Batang Kalu River bridge structure has been carried out. Rainfall data closest to the study location, Kandang Empat Station was used to minimize the errors in the calculation of flood discharge design. Numerical modeling with HEC RAS and scouring estimation with some empiric equation was conducted to predicting scour depth on abutment. Simulation results show scour depth results to an average of 2.731 m and close to the scour depth that occurred in the field (2.83 m). Results showed that the local scouring in the Batang Kalu River bridge structure can be suspected as the influence of the increasing river steepness. Discharge that is triggered by heavy rain with a long duration and increased river flow velocity due to steepness has the potential to create a very intense scouring. Increasing of steepness may have been caused by sand mining activities in the upper reaches. Further studies are needed to see the potential slope changes due to exploitation in the Batang Kalu River upper reaches
Pemanfaatan Sinar Matahari Untuk Pembuatan Pengharum Ruangan dan Obat Anti Nyamuk Alami Berlianti . .; Indra Agus
Jurnal Abdimas: Pengabdian dan Pengembangan Masyarakat Vol 2 No 2 (2020)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.907 KB)

Abstract

Kota Padang sebagai daerah dengan kasus endemik Demam Berdarah (DBD) setiap tahunnya menyebabkan banyak warga masyarakat yang membeli obat anti nyamuk pabrikan yang tentu saja sedikit banyaknya mengandung zat kimia. Obat anti nyamuk dapat dihasilkan dari bahan-bahan yang lebih alami yang banyak tersedia disekitar seperti misalnya batang sereh, kulit jeruk, cengkeh dan kulit manis. Semua bahan-bahan alam tersebut diambil ekstraknya dengan direndam dalam alkohol maksimal 2 hari lamanya. Ekstrak tumbuhan ini kemudian dicampur dengan bahan tambahan seperti tepung rumput laut, gelatin halal dan parafin. Obat anti nyamuk ini selain dapat mengusir nyamuk juga dapat mengharumkan ruangan. Beberapa produk ramah lingkungan pengusir nyamuk dapat berbentuk gel (Sri Rejeki Handayani, 2012), spray/semprot (popmama.com), lilin aromatherapy berbahan beeswax/lilin lebah (popmama.com), diinfusikan ke minyak zaitun (id.ikihow.com) dan masih banyak lagi. Dalam proses pengolahan pengharum ruangan dan pengusir nyamuk ini dibutuhkan larutan air panas. Larutan air panas ini dapat dihasilkan dari kompor berbahan bakar atau pemanas listrik PLN. Penggunaan sumber panas ini dapat dibuat lebih efisien dengan memanfaatkan sumber panas lain yang lebih murah. Kota Padang yang terletak didaerah khatulistiwa dengan sumber panas melimpah dari energi matahari dapat dimanfaatkan untuk menghasilkan air panas. Oleh karena itu, dalam proses pembuatan produk obat anti nyamuk ini akan dimanfaatkan sumber panas dari matahari tersebut. Panas matahari akan diserap oleh kolektor, didalamnya terdapat air yang dialirkan untuk dipanaskan.
Co-Authors -, Hartati - Berlianti . . Dalrino Dalrino Munafri Alwys Noftar Yolanda Sadtim Sadtim Welfi yani Wisafri Wisafri