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All Journal Jurnal Ilmiah Poli Rekayasa FROPIL (Forum Profesional Teknik Sipil) Jurnal Ilmiah Rekayasa Sipil

Elvi Roza Syofyan

Jurusan Teknik Sipil, Politeknik Negeri Padang

Author-ID : 364844

Civil Engineering, Building, Construction & Architecture Education

Published : 19 Documents Claim Missing Document

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Analisis Pengendalian Puncak Banjir Menggunakan Kolam Retensi di DAS Batang Air Dingin Kota Padang Fajri Ramadhan -; Yola Amelia -; Revalin Herdianto -; Elvi Roza Syofyan
Jurnal Ilmiah Poli Rekayasa Vol 16, No 1 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Batang Air Dingin Watershed is one of the watersheds in Padang City which is located at 00050’12,5” to 00050’22,5” South Latitude and 100023’35,85” to 100022’42,84” East Longitude has changed its function. Land in the area around the river flow results in greater surface runoff, which has the potential to cause erosion. Runoff that occurs in Batang Air Dingin Watershed area causes the river to shrink during the dry season causing the local residents’ wells to be drought, while in the rainy season the river discharge value used is obtained. Through the calculation of the hydrograps discharge using the HSS Nakayasu and HEC-HMS methods whose values are validated by the field flood discharge. Hydraulic modelling using HEC-RAS software with discharge from HSS Nakayasu method. The retention pond plan is based on the amount of runoff that cannot be accommodated by the original storage capacity of Batang Air Dingin Watershed during 100 year return period was 1212, 94 m3/second with large river storage capacity is 1205,317 m3/second. The debit that can be deducted by making a retention pond is 30,5%.

Partisipasi Masyarakat Dalam Rangka Penanggulangan Pencemaran Sungai Elvi Roza Syofyan
Jurnal Ilmiah Poli Rekayasa Vol 14, No 2 (2019): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

River is a natural and man made watercourse in network of river flow and its water. The use of water in upper catchment will reduce the opportunity in using it downstream the catchment. Pollution in headwater would result in sosial cost in the downstream area. In turn if the society in the upper catchment preserve the river, the society downsteam the catchment will be benefit from it. Water is a natural resouces to fulfill life need of the society. Therefore, it needs to be preserved to benefit life of man as well other living matters. To preserve or attain water quality which can be used sustainably by the society with acceptable water quality level, there needs to preserve and control water by with preservation and mitigation of river pollution.

Kajian Kelayakan Struktur Bangunan Pasca Kebakaran (Studi Kasus Gedung Pasar Koppas) Kota Padang Elvi Roza Syofyan; Syaiful Amri -; Munafri Alwys -
Jurnal Ilmiah Poli Rekayasa Vol 9, No 2 (2014)
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

In a feasibility study of the structure after the fire ( Case Study Building of Pasar Koppas in Padang ) . To obtain preliminary data, building data includes tracking information about the building construction has been done. Then visual inspection includes examination of the structural system of the building and non-structural components, as well as the configuration of the geometry component of the structure. Measurement of the building is intended to determine the configuration of the building . It can also serve as a confirmation of the existing building geometric conditions . Later examination of the damage structure and non- structural components by visual observation . Field trials conducted to obtain the data quality of the material structure of the building, with a non destruxctive and destructive . This activity is a test of the quality of the concrete surface with a hammer concrete test, concrete homogeneity measurement, measurement of the diameter and spacing of reinforcement, concrete cored drill with the core drill tools, observations reinforcement fatigue . While in the laboratory to test the compressive strength of the concrete core and reinforcement tensile test. Taking photographs of the condition of the buildings, structural components and non-structural components for further examination to determine the location of the damage, as well as a guide to determine damage level of the building, in addition to the photographs can serve as documentation . Then the data evaluation and analysis of the structure of the building . From the results of the evaluation and analysis of the feasibility of building structures from Pasar Koppas could be concluded, that the structure and function of the building is still viable . For the convenience of occupancy necessary to repair or retrofitting the proper manner and method by the Government of Padang City.

Analisa Erosivitas Lahan Pada DAS Batang Agam Dengan Menggunakan Model SWAT Irfan Gustio -; Dwi Putri Jingga; Elvi Roza Syofyan; Chairul Muharis -
Jurnal Ilmiah Poli Rekayasa Vol 16, No 1 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Batang Agam River is a river that flows along Bukittinggi City, Agam Regency, Fifty Cities Regency, Tanah Datar Regency, Payakumbuh City and empties into the Batang Sinamar River. The Batang Agam River, which crosses the residential area, is mostly used for agriculture, fisheries, tourism, mining and other activities. Community activities in the area of the Batang Agam River have resulted in a decrease in the function of the river which is characterized by narrowing, silting and pollution of the river. In addition, it is influenced by the ever-changing river water discharge, land conditions and changes that occur in the river channel. In addition, the negative behavior of the community and all their activities around the river basin also triggers damage to the river. This research was conducted to determine the value of land erosivity towards changes in land use area in the Batang Agam watershed, in this study using land cover in 2010, 2014, and 2019 using the Soil and Water Assessment Tool (SWAT) model and manual calculations were carried out using the USLE method as ratio. The analysis consists of four processes, namely watershed delineation, formation of a Hydrologic Response Unit (HRU), formation of climatological data, and finally the simulation process. The results of the HRU analysis showed that the Batang Agam watershed became 7 sub-watersheds, the dominant HRU was primary forest. In the case of Batang Agam, it was found that the level of erosion hazard was in the light category and the erosion value decreased in each review year.

Model Numerik 1D Penggerusan Endapan di Mulut Muara dengan Metode Beda Hingga Dalrino - -; Mukhlis - -; Elvi Roza Syofyan
Jurnal Ilmiah Poli Rekayasa Vol 10, No 1 (2014)
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Sedimentation at estuary river have potency to cause floods because the narrowing of estuary as outlet. Sedimentation process can be caused by the so small river discharge at dry season so that cannot to flushing the sediment that happened at estuary mouth. When the rains arrive, river discharge which starting to big shall no long castaway to sea freely, so that causes floods in headwaters. Numerical simulation by using finite different method with Preissmann implicit scheme conducted to see ability of river discharge in early the rains to flushing the sediment in estuary mouth. Simulation was done at river with sediment elevation at + 4.00 m in estuary mouth. Boundary condition in the form of discharge hydrograph in early the rains at upstream boundary and also critical water surface elevation in sediment top and sea level at downstream boundary applied at model to see behavior of sediment transport and change of profile at bottom channel that happened. Simulation result show with 24 hours floods charge in early the rains, sediment volume of flushed equal to 20,52 %, with elevation reside at + 3,179 m. Sediment will fully under sea-water face after 9 days simulation. Change of upriver discharge and tidal elevation at downstream will influence to speed of stream that happened. By the end of simulation, the bottom profile of channel influenced of tide.

Analisa Pengaruh Perubahan Penggunaan Lahan terhadap DAS Batang Kuranji dengan Menggunakan Model Soil and Water Assessment Tool (SWAT) Annisa Fitriana Definnas; Rozy Fairuzza Reyandal; Elvi Roza Syofyan; Wisafri - -
Jurnal Ilmiah Poli Rekayasa Vol 15, No 2 (2020): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Batang Kuranji is one of six rivers that flow in the city of Padang, and is the main source of water for residents of Padang City to meet the raw water which is then processed into clean water and the needs of Mt. Nago irrigation water. The increase in population causes the population to move to a higher area (green zone). Batang Kuranji watershed has experienced a reduction in the area of forest land due to changes in land use activities by the population movement. As a result, land that was not watertight at first became watertight, the mainstay discharge or expected discharge is always available, always increasing during the rainy season and decreasing during the dry season. This study was conducted to determine the extent of land use change in the Batang Kuranji watershed, also to determine the main discharge that occurred in 2009, 2011, and 2017 using the Soil and Water Assessment Tool (SWAT) model. The analysis consists of four processes, namely watershed delineation, formation of a Hydrologic Response Unit (HRU), formation of climatological data, and finally the simulation process. HRU analysis results obtained by Batang Kuranji watershed into 9 sub-watersheds, the dominant HRU is protection forest by 62%, soil type with depth (solum) level A and B, runoff coefficient of 0.3 and NS value obtained by 0.6. This shows that the SWAT model can predict the hydrological process in the upstream Batang Kuranji watershed. The most influential land use on surface runoff is land use for settlement.

Model Hidrograf Akibat Perubahan Tataguna Lahan DAS Batang Kuranji (Studi Kasus Sub DAS Danau Limau Manis) Elvi Roza Syofyan; Amrizal Saidi -; Bambang Istijono -; Revalin Herdianto -
Jurnal Ilmiah Poli Rekayasa Vol 13, No 1 (2017)
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

The purpose of the study is to look at changes in land use and hydrograph models of Danau Limau Manis Sub-watershed using data 2011 until 2015.The results shows the change of land use of Batang Kuranji Watershed, Sub DAS Danau Limau Manis can decreased 3.03% from 2011 to 2015. It due to the opening of new land. While shrub rose rose 0360%, because was due of changes of forests that have not done processing. For an others using of the land the number increase 3.40%. It due to changes of forests and shrubs into failure land.. As the runoff coefficient (C) does not occur any significant change that is from 0.405 into 0.408. Peak discharge calculated by the Nakayasu method 128.02 m3 / dt, was greater by Rational method of 127,52 m3 / dt is caused no difference in the approach used.

Reviu Desain Struktur Bawah Bangunan Gedung: Studi Kasus Pengecekan Kekuatan Pondasi Tapak Sekolah Dasar Negeri (SDN) 12 Muntei, Mentawai Fitria, Winda; Misriani, Merley; Syofyan, Elvi Roza
FROPIL (Forum Profesional Teknik Sipil) Vol 11 No 2 (2023): FROPIL (Forum Profesional Teknik Sipil)
Publisher : Jurusan Teknik Sipil Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Muntei is one of the villages in South Siberut, Mentawai Island Regency. The Mentawai Island located in West Sumatera and are outside the territory of the island of Sumatera, including one of the outermost islands in this Province. Mentawai is one of the areas in West Sumatera that is frequently shaken by earthquake. So, the implementation of earthquake resistant building standars is an important factor that must be considered in efforts to reduce disaster risk, considering that West Sumatera is one of the areas with a high earthquake risk. The implementation of earthquake resistant building standards should have started during the planning process. As one of the outermost province Mentawai is also lagging behind in infrastructure development, so sustainable development needs to be carried out to make Mentawai come out of being behind compare to other district in the West Sumatera. The review design of the site foundation of the SDN 12 Muntei school building aims to ensure the carrying capacity of the foundation. To obtain maximum axial value of the building, modeling was carried out using the sap2000 application. From the modeling and data analysis can be concluded that the foundation does not meet the requirements and is unable to carry the maximum load of the building. The allowable capacity of foundation permit for the SDN 12 Muntei is 12.96 Tonenes, while the maximum load on the building is 34.57 tonnes. The result of this analysis show that the foundation is not good and must be repaired.

Simulasi Hidrologi dan Hidraulik Banjir di Lembah Anai: Studi Kasus 11 Mei 2024 Syofyan, Elvi Roza; Herdianto, Revalin; Arlis, Angga Putra; Yuwono, Waluyo; Thaariq, Ath
Jurnal Ilmiah Rekayasa Sipil Vol 22 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v22i1.1618

Since early 2023, Mount Marapi has shown its activity, even until 2024 Mount Marapi has erupted 170 times. Until Monday morning, April 29, 2024, at 06.00 WIB, Mount Marapi remains on Alert status (Level III). This indicates that a lot of landslide material due to volcanic eruptions has accumulated around the peak and upper slopes, which at any time can cause rain-induced lava floods. Related to the activities of Mount Marapi, a map of hazard-prone areas has been issued, including rivers that originate from Mount Marapi which are susceptible to rain-induced lava floods. The research was carried out by identifying river network patterns, hydrological characteristics, river morphology, and land use changes. The river network was analyzed using the Digital Elevation Model (DEM) from ASTER GDEM with a resolution of 8 m. Field validation for the river network was carried out using GPS Mapping at the Xakapa location. The hydrological and hydraulic profiles of the watershed were modeled using HEC-geoHMS and HEC-geoRAS to map the relationship between rainfall intensity, river discharge, and water level elevation along the river. From the modeling results, it can be seen that the rainfall intensity that has the potential to cause flooding is 142 mm/hour, using HEC-GeoHMS with a discharge of 1818 m3/second with a rainfall time of 6 hours causing a flood height of 0.81 m at an elevation of 379.9 with a wet cross-sectional area of 471 m2 in Xakapa.

Co-Authors -, Amrizal Saidi Afla Dina - Amrizal Saidi Anne Fadillah - Annisa Fitriana Definnas Arlis, Angga Putra Bambang Istijono, Bambang Chairul Muharis - Dalrino Dalrino Dwi Putri Jingga Fajri Ramadhan - Irfan Gustio - Jajang Atmaja Maryam Afifa - Mukhlis Mukhlis Munafri Alwys - Prestyo Anggara Lubis Revalin Herdianto Rozy Fairuzza Reyandal RR. Ella Evrita Hestiandari Syaiful Amri Thaariq, Ath Tri Intan Putri Winda Fitria Wisafri Wisafri Yola Amelia - Yuwono, Waluyo

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