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Yuda Romdania
Lampung University
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Redesign Drainage System and Infiltration Wells Design in Lampung University (Case Study: UNILA Statue-Al-Wasii Mosque) yunianto, mohammad lutfi; Purwadi, Ofik Taufik; Romdania, Yuda
Jurnal Rekayasa Sipil dan Desain Vol 6, No 2 (2018): Edisi Juni 2018
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Drainage is a way  for removal of excess water with a solution about excess of water. Nevertheless, a lot of drainage systems have a bad performance and out of its function. One of them is drainage system in Lampung University around Al-Wasi’i Mosque-Lampung University statue. One of the solution is environmental arrangement and one of the environmental arrangement is redesign of drainage system. It aim for resolve some flood inundationthat happened  in the rain because failed optimilize in drainage system aroun Al-Wasi’i Mosque-Lampung University statue. The analysis conducted in this research includes hydrology analysis and hydraulics analysis using HEC-RAS 4.1.0 application. Hydrology analysis aims to calculate the design discharge using rational, haspers and weduwen methods and modeling with HEC-RAS 4.1.0 application aims to determine the capacity of the water level  existing channel. So it can be known where the position of the flood point and planning the new channel dimensions. Based on the analysis, the need for dredging at D8-D10 indicating the occurrence of run off  and inundation at across of Al-Wasi’i Mosque. Planning of infiltration wells is also very needed to overcome the problem of frequent flooding in Faculty of Engineering. It is also necessary to decrease run-off discharge in channel around Al-Wasi’i mosque’s areas.The necessary is did concrete lining in base and two-side of channel. 
Perencanaan Drainase Berbasis Eco-Technology ditinjau dari Migrasi Ular (Studi Kasus: Suaka Rhino Sumatera, Taman Nasional Way Kambas) Herison, Ahmad; Romdania, Yuda; Wahono, Endro Prasetyo; Fahri, Muhammad Yusrizal
Jurnal Teknologi Lingkungan Vol. 21 No. 2 (2020)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

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Abstract

ABSTRACTWay Kambas National Park (TNWK) is one of the conservation areas in Lampung Province. The National Park functions to protect, preserve various kinds of animals and conservation. Design based on Eco-Technology is an absolute requirement for the sustainability of the region. This study aims to plan Eco-Technology-based drainage from road construction in the Sumatra Rhino Sanctuary (SRS), Way Kambas National Park, with snake objects. Every infrastructure development, such as drainage, must pay attention to the lives of wild animals such as snakes. Planning starts with calculating hydrological analysis to produce a debit plan with a rational method. Analysis of snake migration is done to determine the behavior and migration of snakes. Based on the calculation results there is no flood point from the planning of cross-section D1-D8 with the width of the channel width (b) = 20 cm, water depth (h) = 14.47 cm, peak width (B) = 220 cm, cross-section = 10° and cross-section material used is soil. With the drainage concept, the migration of snakes from one span to another is not disturbed to maintain the balance of the natural ecosystem. The conclusion is that the drainage design obtained is getting sloping, so the drainage conditions are better and friendly to snakes.Keywords: Eco-Technology, drainage, conservation, Way Kambas National Park, snake migrationABSTRAKTaman Nasional Way Kambas (TNWK) merupakan satu diantara kawasan konservasi yang berada di Provinsi Lampung. Taman Nasional berfungsi untuk melindungi, melestarikan berbagai macam satwa dan konservasi. Desain yang berbasis Eco-Technology merupakan syarat mutlak untuk keberlanjutan kawasan itu. Penelitian ini bertujuan untuk merencanakan drainase berbasis Eco-Technology dari suatu pembangunan jalan di Suaka Rhino Sumatera (SRS), Taman Nasional Way Kambas dengan objek ular. Setiap pembangunan Infrastruktur seperti drainase harus memperhatikan kehidupan satwa liar seperti ular. Perencanaan dimulai dengan melakukan perhitungan analisis hidrologi untuk dapat menghasilkan debit rencana dengan metode rasional. Analisis migrasi ular dilakukan untuk mengetahui perilaku dan migrasi ular. Berdasarkan hasil perhitungan tidak terdapat titik banjir dari perencanaan penampang D1-D8 dengan ukuran lebar dasar saluran (b) = 20 cm, kedalaman air (h) = 14,47 cm, lebar puncak (B) = 220 cm, kemiringan penampang = 10° dan bahan penampang yang digunakan adalah tanah. Dengan adanya konsep drainase tersebut, migrasi ular dari bentang satu ke bentang lainnya tidak terganggu sehingga dapat menjaga keseimbangan ekosistem alam. Kesimpulannya adalah desain drainase yang didapat makin landai, maka kondisi drainase makin baik dan ramah terhadap ular.Kata kunci: Eco-Technology, drainase, konservasi, Taman Nasional Way Kambas, migrasi ular
Pemetaan Kemiringan Lereng Menggunakan Software Geographic Information System Pada Sub DAS Way Pubian Setyanugraha, Tegar; Romdania, Yuda; Herison, Ahmad; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain Vol 11, No 2 (2023): Edisi Juni 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Land use utilization in a watershed must pay attention to the slope. The slope that will be analyzed is the slope of the Way Pubian Subwatershed, Way Seputih Watershed, Lampung Province. Over time, population growth will increase in the Way Pubian Subwatershed area resulting in land use change which is an important trigger factor for landslides. Perhaps slope mapping has been done in many places, but for the Way Pubian Subwatershed area it has never been done. So it is important to conduct slope mapping in the Way Pubian Subwatershed. The purpose of the study was to conduct slope mapping and its classification using ArcGIS. Based on the results of the analysis with ArcGIS obtained slope map in Way Pubian Subwatershed with five classifications namely flat (0-8%), ramps (8-15%), rather steep (15-25%), steep (25-45%), and very steep (>45%). Way Pubian Subwatershed has an area of 11,562.8762 Ha where 3,026.7852 Ha (26.1767%) is the classification of 25-45% slope class (Steep) which is the largest compared to the area of other classification classes. In the classification class flat (0-8%), ramps (8-15%) and rather steep (15-25%) do not have too much difference. While the very steep classification class (>45%) is the area with the least area. The conclusion is that the slope map is obtained with the largest classification of slope is in the steep class.
Daya Lenting Akar Mangrove Rhizophora sp. sebagai Peredam Gelombang (Studi Kasus Pantai Dewi Mandapa, Pesawaran) Khadafi, M Fariq; Herison, Ahmad; Romdania, Yuda; Khotimah, Siti Nurul
Jurnal Rekayasa Sipil dan Desain Vol 12, No 1 (2024): Edisi Maret 2024
Publisher : Jurnal Rekayasa Sipil dan Desain

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Hutan mangrove adalah sekelompok pohon atau tumbuhan yang hidup dengan kesamaan adaptasi morfologi dan fisiologi terhadap habitat yang dipengaruhi pasang surut. Gelombang laut menyebabkan abrasi di sekitar pesisir pantai. Daya lenting mangrove memberikan kontribusi besar terhadap peredam gelombang.Tujuan penelitian adalah untuk mengetahui daya lenting akar tunjang mangrove Rhizophora sp. sebagai peredam gelombang.Metode digunakan pada penelitian ini adalah metode Transek-kuadrat oleh Wantasen tahun 2002 untuk menghitung cakupan daerah penelitian. Pengujian dilakukan menggunakan alat Control Universal Testing Machine dan dilakukan uji tarik untuk mendapatkan nilai gaya yang dapat ditahan oleh satu akar mangorve. Hasil pengolahan di peroleh pada ketebalan 10 meter, kelentingan akar tunjang mencapai 2,7380E+03 J/m2 dengan energi gelombang yang bisa ditahan sebesar 2,97726E-01 J/ms. Namun, pada ketebalan 50 meter, kelentingan turun menjadi 2,2041E+03 J/m2 dengan energi teredam sebesar 2,99245E-01 J/ms. Kesimpulannya adalah daya lenting akar tunjang oleh mangrove Rhizophora sp memiliki data lenting yang baik dalam meredam gelombang, daya lenting akar mangorve akan meningkat seiring dengan bertambahnya jumlah akar mangrove pada suatu area sehingga energi peredaman meningkat.
Pemetaan Ekowisata Terumbu Karang Berbasis Geographic Information System (GIS) di Pulau Pahawang Madany, Orista Ammar; Herison, Ahmad; Romdania, Yuda; Ashruri, A
Jurnal Rekayasa Sipil dan Desain Vol 11, No 2 (2023): Edisi Juni 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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AbstractCoral reef ecosystems are threatened with extinction. Along with the development of technology, the distribution of coral reefs can be reviewed only by looking at an information map. The purpose of this research is to map coral reef ecotourism on Pahawang Island. So that it is expected to provide information to the community and also island developers related to the condition of the coral reef ecosystem on Pahawang Island. The method used in map processing is sentinel 2A image data processing with the guided classification method in ArcGIS software, while the analysis method is descriptive, which describes the results of the coral reef cover map. The results of the analysis and discussion found that Geographic Information System (GIS) based remote sensing with processed sentinel 2A imagery is very helpful in the process of finding information on the distribution of coral reefs on Pahawang Island. Data processing in ArcGIS software using guided classification methods can be used in order to produce coral cover maps. The results of the coral reef distribution map have an area of 128.64 Ha. The conclusion is that Geographic Information System (GIS) based remote sensing with ArcGIS software can be used to produce coral cover maps. On Pahawang Island, the coral reef cover area of 128.64 Ha was obtained.
Analisis Indeks Erosivitas Hujan menggunakan Metode Bols dan Utomo (Studi Kasus: Sub DAS Way Pubian, Das Way Seputih, Provinsi Lampung) Agestia, Lady; Romdania, Yuda; Ashruri, Ashruri; Herison, Ahmad
Jurnal Rekayasa Sipil dan Desain Vol 11, No 2 (2023): Edisi Juni 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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Indonesia has a tropical climate which results in high rainfall throughout the year. The high rainfall makes Indonesia prone to erosion. The ability of rainfall to cause erosion is called rainfall erosivity. The study aims to calculate the rainfall erosivity index in the Way Pubian Subwatershed area by comparing the Bols and Utomo methods. The research methods used include; data consistency test, rainfall analysis, and calculation of rainfall erosivity index. Based on several studies on the erosivity index, in the Indonesian region the calculation of the Bols Method erosivity index often gets a higher value than the Utomo Method because the data used for the calculation of the Bols Method requires more data than the Utomo Method which only uses monthly rainfall data. The conclusion is that the Bols Method erosivity index value is 2651.2120 and the Utomo Method is 1008.3435, the Bols Method erosivity index value is higher than the Utomo Method value with an interval of 1642.8685. The use of the Bols equation to calculate the erosivity index value is considered safer to use in estimating the erosion rate. Keywords: Bols, Rainfall Erosivity, Sub Das Way Pubian, Utomo
STUDI POTENSI EKOWISATA MANGROVE DI PETENGORAN, KABUPATEN PESAWARAN Cesarani, Anisa; Herison, Ahmad; Ashruri, Ashruri; Romdania, Yuda
Jurnal Rekayasa Sipil dan Desain Vol 11, No 2 (2023): Edisi Juni 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Mangrove ecotourism is difficult to establish. This is caused by the lack of awareness of the community and village officials in managing these tourist attractions. Activities to develop the Petengoran mangrove ecotourism area to improve the welfare of coastal communities through the preparation of guidelines for the development of mangrove ecotourism for stakeholders from Gebang Village. So this study aims to determine the type, density value, frequency, dominance and important index value (INP) of the Petetengoran mangrove by collecting data using the line transect method by counting the number of species (trees, poles, saplings, seedlings). From the research results with 3 observation plots, four species were found, namely: Avicennia Marina, Ceriops Sp, Rhizophora Apiculata, Rhizophora Stylosa. The type of mangrove that has the highest important value index (INP) for the tree level is that of Rhizophora Apiculata (INP: 165.85) and the lowest is Ceriops Sp (INP: 7.14), for the sapling/sapling level the mangrove species has an important value index the highest and lowest was Rhizopora stylosa (INP : 15, 69). As for the seedling level, the species that had the highest and lowest importance value index were Rhizophora Apiculata and Rhizopora stylosa (INP : 165.85) and the lowest (INP: 15.69). It was concluded from the results that have been carried out that the Petengoran mangrove forest area can be said to be suitable for development as an ecotourism destination with the results of the analysis of the density of the mangrove vegetation showing that the dominant plant species is Rhizophora Apiculata, so that the condition of the mangrove forest in Petengoran, Padang Cermin District, is included in the condition category. good with moderate criteria, not too dense.
Kemampuan Mangrove dalam Menjaga Garis Pantai Arief, Farah Diba; Herison, Ahmad; Zakaria, Ahmad; Romdania, Yuda
Jurnal Rekayasa Sipil dan Desain Vol 11, No 1 (2023): Edisi Maret 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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Mangrove ecosystems are able to maintain the coastline from abrasion and erosion, and are able to withstand strong winds coming from the ocean to land. The purpose of this study is to determine the ability of roots, litter and sedimentation in maintaining the coastline. The methods to be used are quadrat transect, spot check and laboratory tests. The result is that mangrove roots have the greatest damping effectiveness compared to litter and sedimentation, because mangrove roots have a bouncy force and have a dense density. So it can be concluded that the factors in mangroves that can prevent abrasion due to the impact of sea waves are mangrove roots, litter and sediment that can be a natural damper of environmentally friendly beachfront buildings. The thicker the mangrove ecosystem, the greater the ability to dampen waves. Key words : mangroves, coast, waves, abrasion Ekosistem mangrove mampu menjaga garis pantai dari adanya abrasi dan erosi, serta mampu menahan tiupan angin kencang yang datang dari lautan menuju daratan. Tujuan dari penelitian ini adalah mengetahui kemampuan akar, serasah dan sedimentasi dalam menjaga garis pantai. Metode yang akan digunakan yaitu transek kuadrat, spot check serta uji laboratorium. Hasilnya bahwa akar mangrove memiliki keefektifan peredaman terbesar dibandingkan serasah dan sedimentasi, karena akar mangrove memiliki gaya lenting dan memiliki kerapatan jenis yang padat. Sehingga dapat disimpulkan bahwa faktor pada mangrove yang dapat mencegah abrasi akibat hantaman gelombang laut yaitu akar mangrove, serasah dan sedimen yang dapat menjadi peredam alami bangunan tepi pantai yang ramah lingkungan. Semakin tebal ekosistem mangrove, maka akan semakin besar kemampuan meredam gelombang.  Kata kunci : mangrove, pesisir pantai, gelombang, abrasi
Perbandingan Metode Penentuan Intensitas Curah Hujan (Studi Kasus: Kawasan Wilayah Sukarame Bandar Lampung) Yanti, Cristi; Herison, Ahmad; Zakaria, Ahmad; Romdania, Yuda
Jurnal Rekayasa Sipil dan Desain Vol 11, No 2 (2023): Edisi Juni 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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One of the main factors causing flooding in an urban area is rainfall intensity. Perhaps this research has been widely discussed in other studies, but this research was conducted in an area with rainfall characteristics that are different from other areas, so this research is expected to provide further information for flood management and water structure design in related areas. The purpose of the research is to obtain and compare rain intensity methods in order to select a method that is suitable for rainfall characteristics in the sukarame area.  The short-term intensity calculation method uses the Mononobe method because this method only requires maximum daily rainfall data. The calculation of rain intensity approach uses Talbot and Sherman methods to find the appropriate rain intensity method. The results showed that high-intensity rain lasts for a short duration. From the comparison results, different rain intensity analysis results were obtained, this may be due to the use of different settings from each method. It is concluded that the Mononobe method with the Sherman equation is most suitable for rainfall characteristics. Key words : Rainfall Intensity, Mononobe, Talbot, Sherman, IDF Curve.
Pemetaan Tata Guna Lahan dengan Metode Supervised Classification Qur'ani, Mutiara Nurul; Romdania, Yuda; Zakaria, Ahmad; Herison, Ahmad
Jurnal Rekayasa Sipil dan Desain Vol 11, No 2 (2023): Edisi Juni 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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Land use is used to determine the effect of community activities on the land use of an area. Currently, the search for land use information can be reviewed periodically with remote sensing technology. The aim of the research is to map land use and provide information to the public regarding the condition of land use in the Way Pubian Sub-watershed area. The method used in processing land mapping data is supervised classification based on the training samples that have been collected. The supervised classification method is available in ArcGIS software. The method of analysis refers to descriptive analysis, by describing the land use maps obtained. The results of the map show that land use in the Way Pubian Sub-watershed consists of ponds of 1.57 Ha with a percentage of land of 0.01%, forest land of 6719.14 Ha of a percentage of 57.83%, open land area of 122.58 Ha of percentage 1.06%, settlements 823.2 Ha a percentage of 7.08%, Plantations 2783.11 Ha a percentage of 23.95% and paddy fields 1169.34 Ha with a land percentage of 10.06%. Compared to Landsat imagery, map making is more effective if using high-resolution imagery, then Google Earth imagery is used as data processing material. The conclusion obtained by processing data with ArcGIS software helps in mapping land use, obtaining the area and percentage of land use. The percentage results show that the largest land use is forest land and the smallest land area is pond land.Keywords: map, land use, watershed, GIS, imagery
Co-Authors adama, riri arinda Agestia, Lady Ahmad Herison Ahmad Zakaria Ahsan, Fathan Naufal Anma Hari Kusuma, Anma Hari Arief, Farah Diba Ashruri Ashruri, Ashruri Ashruri, A Azzahra, Ardhita Rahma Azzahra, Iftasya Shafa Cesarani, Anisa Dewi, Tiara Servita Endro Prasetyo Wahono Fahri, Muhammad Yusrizal Fakhrizal, Achmad Bagus Kesuma, Mas Achmad Arief Rachmatulah Khadafi, M Fariq M, Sefrinta S Madany, Orista Ammar Murda, Gung Bagus J Ofik Taufik Purwadi, Ofik Taufik Pratama, Muhammad Vareza Purwadi, Ofik Qur'ani, Mutiara Nurul Sari, Devi Kurnia Septiansari, Annisa Putri Dwi Setyanugraha, Tegar Siti Nurul Khotimah Subuh Tugiono, Subuh Sudewa, Wijoyo Mensen Taufik P, Ofik W, Endro widarsono, eko Yanti, Cristi yunianto, mohammad lutfi