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All Journal Teknik Sipil dan Arsitektur JURNAL TEKNOLOGI LINGKUNGAN Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Jurnal Rekayasa Sipil dan Desain Teras Jurnal BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Jurnal Teknik Sipil dan Arsitektur Jurnal Industri Pariwisata Jurnal Teknik Sipil J-Sil (Jurnal Teknik Sipil dan Lingkungan)
Yuda Romdania
Lampung University
Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Medicine & Pharmacology Social Sciences Transportation Other

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Analisis Data Curah Hujan yang Hilang dengan Menggunakan Metode Normal Ratio, Inversed Square Distance, Rata-Rata Aljabar dan Linear Regression (Studi Kasus Data Curah Hujan Beberapa Stasiun Hujan Wilayah Lampung Tengah) Septiansari, Annisa Putri Dwi; Zakaria, Ahmad; Khotimah, Siti Nurul; Romdania, Yuda
Jurnal Rekayasa Sipil dan Desain Vol. 9 No. 4 (2021): Edisi Desember 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i4.2219

Abstract

Data hujan sangat penting dan dibutuhkan dalam perhitungan teknik sipil maka kelengkapan data hujan merupakan salah satu bagian terpenting dalam kaitannya perencanaan manajemen keairan, menajemen sumber daya air, maupun perencanaan pembangunan, terlebih lagi untuk perencanaan bangunan air. Namun sering kali terjadi data pada periode perekaman pada stasiun hujan yang ada di suatu wilayah tidak lengkap. Untuk melengkapi data curah hujan yang tidak lengkap atau hilang, maka pada penelitian ini dilakukan penelitian untuk memprediksi data curah hujan dengan menggunakan metode Normal Ratio, Linear Regression, Inversed Square Distance, Rata-rata Aljabar. Dari hasil penelitian ini metode modifikasi rata-rata aljabar didapatkan sebagai metode terbaik untuk pencarian data hujan yang hilang. Terbukti dari nilai korelasi rata-rata tahunan yang paling besar, yaitu: 0,301. Nilai ini menunjukkan bahwa hubungan antara data hujan terhadap korelasi tahunan masih lemah. Hal ini disebabkan nilai korelasi masih jauh dari angka 1 (nilai maksimum)
Kalibrasi Alat Ukur Sedimen Tersuspensi Berbasis Turbidity Sensor Fakhrizal, Achmad Bagus; Romdania, Yuda; Wahono, Endro Prasetyo; Herison, Ahmad
Jurnal Rekayasa Sipil dan Desain Vol. 10 No. 4 (2022): Edisi Desember 2022
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v10i4.2857

Abstract

AbstractTurbidimeter is a standard instrument used to determine the level of turbidity of water. However, its use is felt to be less effective and efficient because it is not carried out in running water. Based on this statement, a practical suspended sediment measuring instrument based on a turbidity sensor is needed. Furthermore, to ensure the ability of a measuring instrument, an activity is needed to determine the validity of the conventional instrument reading value. Therefore, this study aims to calibrate the suspended sediment measuring instrument based on the turbidity sensor. The method used is to compare the measurement results of the design instrument against measuring standards that are traceable to international standards. Turbidity measurements were carried out using two devices which were compared at the same time.The results of the calibration show the output pattern with the appropriate level of linearity. The R-squared value which is the correlation coefficient, with R2=0.9667 indicates a good match between the two instruments. The slope gradient of the curve line is 1.1083 which means that the NTU-18 turbiditymeter is well calibrated. The results of the calculation of the unit conversion of NTU and mg/L have the average square of error or a correlation coefficient of R2=0.8984, meaning that both have a good correlation. In conclusion, the measuring instrument is able to operate properly and without problems. The tool manages to provide relative precision and practical response times, so work efficiency can be increased.  Keywords: Turbidity, Calibration, Convertion AbstrakTurbidimeter merupakan instrumen standar yang digunakan untuk menentukan taraf kekeruhan air. Namun penggunaannya dirasa kurang efektif dan efisien karena tidak dilakukan pada air mengalir. Berdasarkan pernyataan tersebut maka dibutuhkan instrumen ukur sedimen tersuspensi yang praktis berbasis turbidity sensor.Selanjutnya untuk memastikan kemampuan suatu alat ukur, maka diperlukanlah suatu aktifitas untuk menentukan keabsahan konvensional nilai pembacaan instrumen. Oleh karena itu, pada penelitian ini bertujuan untuk mengalibrasi alat ukur sedimen tersuspensi berbasis turbidity sensor. Metode yang digunakan pada penelitian ini yaitu dengan cara membandingkan hasil pengukuran alat rancangan terhadap standar ukur yang mampu telusur ke standar internasional. Pengkuran turbiditas dilakukan menggunakan dua alat yang dibandingkan pada waktu yang bersamaan.Hasil kalibrasi alat menujukkan pola output dengan tingkat linieritas yang sesuai. Nilai R-kuadrat yang merupakan koefisien korelasi, dengan R2=0,9667 menunjukkan kecocokan yang baik antara kedua instrumen. Gradien kemiringan garis kurva bernilai 1,1083 memiliki arti bahwa turbiditimeter NTU-18 sudah terkalibrasi dengan baik. Hasil perhitungan konversi satuan NTU dan mg/L memiliki kuadrat kesalahan rata-rata atau koefisien korelasi sebesar R2=0,8984, artinya keduanya memiliki korelasi yang baik. Kesimpulannya alat ukur mampu beroperasi dengan baik dan tanpa masalah. Alat berhasil memberikan presisi relatif dan waktu respons yang praktis, sehingga efisiensi pekerjaan dapat ditingkatkan. Kata Kunci :Turbidity, Kalibrasi, Konversi
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 : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v11i1.3050

Abstract

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
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 : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v11i2.3274

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.
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 : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v11i2.3275

Abstract

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
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 : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v11i2.3276

Abstract

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 : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v11i2.3426

Abstract

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
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 : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v11i2.3429

Abstract

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.
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 : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v11i2.3442

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.
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 : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v12i1.4488

Abstract

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.
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