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ANALISIS KASUS SEDIMENTASI DI TIGA TITIK KAWASAN WATER FRONT CITY Romdania, Yuda
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 14, No 1 (2010): Edisi April Tahun 2010
Publisher : UNIVERSITAS LAMPUNG

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Abstract

Prediction of sediment transport along the coast for various conditions is very important to knowin order to know the amount of sediment transport and examine the influences that tend toprovoke. Existence of the buildings on the coast will cause sedimentation in one hand and on theother side causing erosion. Bandar Lampung is city with a coastal region, is currently designing ajob that is Water Front City (beach city) which is designed in an effort to carry out vision andmission of Bandar Lampung City which is "Making the city of Bandar Lampung become civilized,comfortable and sustainable." The existence of this work it is necessary to design a sedimentationanalysis in order to know the amount of the resulting sediment transport and the influences whichtend to be caused due to designing Water Front City. Data collection is performed at three pointsthen inserted to CERC Equation which get a conclusion of sediment movement from two pointsconical at one point which is toward the Panjang Port, resulting a large pile of sediment aroundPanjang Port area.
ANALISA TRANSPOR SEDIMEN DAN PENGARUHNYA TERHADAP PENGERUKAN KOLAM PELABUHAN BATUBARA DI KAWASAN SUKARAJA BANDAR LAMPUNG Romdania, Yuda
Jurnal Rekayasa Vol 16, No 3 (2012): Edisi Desember 2012
Publisher : UNIVERSITAS LAMPUNG

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Abstract

In planning the construction and development of the Port, sedimentation or siltation problemsshould be minimized, especially in swimming harbor to secure and expedite the flow of shipping.Every time the sediment on the seabed will increase, in connection with the, to reduce siltationcaused by sedimentation is by dredging sediment pond Ports. Sediment defined as a collection ofparticle-organic and inorganic particles are irregularly shaped and accumulate extensively incoastal areas. based on Longshore Sediment Transport Table average rate of sediment obtained2176071.364 m3/yr/m. it means, within a period of 1 year, the extent of sediment by 2176071.364m2. And the time when the maximum height allowable sediment was 10.69 years. It means every10.69 years to do the dredging of the sediment on the sea floor, particularly in the harbor pool.
Perencanaa Sistem Penyediaan Air Baku di Kecamatan Punduh Pidada dan Kecamatan Padang Cermin, Kabupaten Pesawaran Kristia, Merida; Susilo, Gatot Eko; Romdania, Yuda
Jurnal Rekayasa Sipil dan Desain Vol 4, No 3 (2016): Edisi September 2016
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

The main needs of water for various purposes will continue to increase based on thenumber of people who continue to grow and the development of the rate of developmentsin various sectors. On the other hand, the number of infrastructure delivery of water iscurrently still relatively limited, that hasn’t meet the needs of water. The demandsunavoidable, but shall predictable and planned utilization as well as possible. A trendfrequent are the imbalance between supply and demand for water. To achieve a balancebetween the need for water and availability of water in the future , efforts are required tomeet builders infrastructure raw water community.Domestic water needs for Padang Cermin sub-district is 32,46 l / s and Punduh Pidadasub-district is 10 l / s for 2015. For the next 20 years, the demands for water will be71,18 l/s for Padang Pidada sub-district and 71,18 l/s for Padang Cermin sub-district.The availability of water must meet the size of the high demand for water in order tosatisfy their daily needs. Methods used to acknowledge the number of the availability ofwater is the method by F.J. Mock. The calculation on that available minimum dischargein das way selorejo is 78 l / s and das way curup is 97 l / s.From the calculation on above, the availability and needs water at das way curup anddas way selorejo had a surplus of the availability of water because environmentalconditions in kecamatan punduh pidada and kecamatan padang cermin is in goodcondition.Keywords : Water needs, availability of water, Water Supply Building Materials
Analisis Hidrologi dan Hidrolika pada Saluran Drainase Ramanuju Hilir Kotabumi (Menggunakan Program HEC-RAS) Mustofa, Muhammad Jazuli; Kusumaastuti, Dyah Indriana; Romdania, Yuda
Jurnal Rekayasa Sipil dan Desain Vol 3, No 2 (2015): Edisi Juni 2015
Publisher : Jurnal Rekayasa Sipil dan Desain

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The calculation is done using the rainfall data obtained from BMKG Kotabumi North Lampung,from 1998 until 2011 with time increment in minutes. The Log Pearson III method is used to findthe design rainfall with return period 2 years, 5 years and 10 years. Then the result isimplemented in the Intensity-duration-frequency (IDF) curves. Time of concentration is linked intothe IDF curves to determine rainfall intensity. Based on the calculated rainfall intensity, thedesign discharge for each return period can be calculated using the rational method.The values of design discharge are then inputted as upstream boundary condition in HEC-RAS.Model output are presented in cross and long section to determine at which return period thedrainage capacity is overflowed. Simulation using HEC-RAS were also done to determine thechannel capacity.Based on the results of this research, it can be concluded that rainfall intensities are 52,6918mm/hour, 65,7820 mm/hour and 75,9032 mm/hour, for 2, 5, an 10 year return period respectively.The capacity of the drainage channel is 2.02 m 3 /hour and is expected to be exceeded on 5 yearsreturn period.Key words : Intensity, Rasioanal method, HEC-RAS, capacity
IDENTIFICATION OF SPRING IN EAST LAMPUNG hari perdana, rudi; Eko Susilo, Gatot; Romdania, Yuda
Jurnal Rekayasa Sipil dan Desain Vol 5, No 3 (2017): Edisi September 2017
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

          Water is the source for life. Earth is called the blue planet, as water covers three-quarters of Earths surface. Its just that most of the sea water (salt water).  Generally, the condition springs in Indonesia experienced a decline in the amount and debit, were damaged in the catchment area and the surrounding environment. To determine the existence of water resources, necessary to identify water resources. This research is to identify the sources of springs in knowing the status of water resources.          The primary data collection is done by identifying the condition of land cover in the catchment area, the condition of the springs, the condition of land cover in a radius of 200 m, the performance of the fountain, the critical level of water catchment areas, the critical level of water catchment areas, the critical level of a radius of 200 m, utilization springs, and the dependence of communities on water resources. While the collection of secondary data obtained from BPLHD Kab. East Lampung in the form of water quality data from 12 springs. Spring Water Quality Analysis using WQI Malaysia with graphic works of Dr. GatotEkoSusilo, S.T., M.Sc.          From the calculations, the average value of the 12 WQI water source is 95.1, meaning that all 12 springs are so richly used by people for drinking, bathing, cooking and others. The 12 water spring in the district of Batang Among them there are 5 springs, in the district of Marga Tiga there are 5 springs, in the District of Sri Bawono there is one source of water, and in District Jabung there is one source of water. Keywords: Water, Water Quality, East Lampung Spring Water, Water            Quality Index Malaysia 
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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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. 
Perhitungan Pasang Surut Sebagai Data Pendukung Dalam Penataan Kawasan Daerah Pesisir Teluk Betung Bandar Lampung. Romdania, Yuda
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 14, No 3 (2010): Edisi Desember Tahun 2010
Publisher : UNIVERSITAS LAMPUNG

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Abstract

To ensure continuity of economic activity in particular and development in a broad sense in this area, the development of various facilities which are expected to support economic activity is much-needed. Therefore we need a spatial development that is community based by rearranging the relevant regional spatial planning by involving the community in the spatial planning process.As a coastal area, tidal factor wil affect spatial planning in Teluk Betung Bandarlampung coastal area. Tidal data will be used in structuring the analysis of coastal areas as a primary or secondary data.The type of tides in the coast area of Teluk Betung, Bandar Lampung is semi-diurnal type. This implies that the region experienced double-tide and low tide twice daily. Within one month, there are two occurance of high tide (spring tide) and low tide (neap tide).Tides in Teluk Betung Bandar Lampung coast are has a range (tidal range) of 114 cm (= 119 cm - 5 cm recording on signs), or has an amplitude of about 57 cm.
DESIGN AND IMPLEMENTATION OF WEBGIS MARINE ECOTOURISM AREA, TEGAL ISLAND, LAMPUNG PROVINCE herison, ahmad; Romdania, Yuda; Zakaria , Ahmad; Kusuma, Sandy
Jurnal SPATIAL Wahana Komunikasi dan Informasi Geografi Vol 19 No 2 (2019): Spatial : Wahana Komunikasi dan Informasi Geografi
Publisher : Department Geography Education Faculty of Social Science - Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (386.851 KB) | DOI: 10.21009/spatial.192.4

Abstract

Tegal Island has the potential and diversity of marine tourism which is an attraction for tourists. However, information is not yet available that can help tourists in knowing the objects and tourist areas contained in Tegal Island. This research presents tourism information in Tegal Island in the form of a Geographic Information System map. The mapping method is done using Quantum GIS software with the help of the QuickMapServices (QMS) plugin to display Google Earth imagery and the qgis2web plugin to convert QGIS files (.qgz) into web maps (WebGIS) and the presence of tourist index input. The mapping results obtained digitization of each tourist object and facility on Tegal Island in the form of shapefiles (.shp) as well as information displayed on the attribute table layer. WebGIS is used as a media for GIS map renderers that is easily accessed and adjusted according to the JavaScript Leaflet library (open source). Map of Geographic Information Systems makes it easy for people to convey and search for tourist information on Tegal Island.
Kajian Penggunaan Metode Empiris dalam Menentukan Debit Banjir Rancangan pada Perencanaan Drainase (Review) Herison, Ahmad; Romdania, Yuda; Purwadi, Ofik Taufik; Effendi, Rahmat
Jurnal Aplikasi Teknik Sipil Vol 16, No 2 (2018)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (518.851 KB) | DOI: 10.12962/j2579-891X.v16i2.3819

Abstract

Air merupakan faktor terpenting, apabila tidak dikelola dengan baik dapat menimbulkan kerugian, salah satunya adalah banjir.  Pencegahan banjir dengan mengoptimalkan saluran drainase. Kegiatan ini bertujuan untuk mereview penelitian terdahulu mengenai peren­canaan drainase, khususnya metode yang dipakai untuk menghitung debit banjir ranca­ngan.  Metode yang digunakan antara lain: Metode Rasional, Weduwen dan Melchior.  Pe­ne­tapan masing masing metode bergantung pada data hujan, karakteristik daerah aliran, dan data debit. Berdasarkan review, penetapan metode untuk menghitung debit banjir rancangan didasarkan pada luas daerah tangkapan airnya.  Lokasi penelitian yang memi­liki luas DAS 0,53 ha sampai 97,34 ha menggunakan Metode Rasional, luas Daerah Aliran Sungai (DAS) 392, 1 ha menggunakan Metode Weduwen, luas DAS 77.088,8 ha meng­gunakan Metode Melchior. Kesimpulannya adalah, perhitungan debit banjir rancangan dengan luas DAS kurang dari 300 ha menggunakan Metode Rasional.Keywords: drainage, flood discharge design, rational method, melchior
STUDI PENURUNAN TANAH GAMBUT PADA KONDISI SINGLE DRAIN DENGAN METODE VERTIKAL DRAIN DENGAN MENGGUNAKAN PRELOADING Herison, Ahmad; Romdania, Yuda; Putri, Febrizky C
Jurnal SPATIAL Wahana Komunikasi dan Informasi Geografi Vol 15 No 1 (2016): Jurnal SPATIAL - Wahana Komunikasi dan Informasi Geografi, Volume 15 Nomor 1, M
Publisher : Program Studi Pendidikan Geografi

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Abstract

ABSTRAK Pembangunan konstruksi di atas tanah gambut akan mendapatkan beberapa masalah geoteknik. Salah satunya adalah terjadinya penurunan (konsolidasi) tanah yang apabila mengalami pembebanan diatasnya maka tekanan air pori akan naik sehingga air pori ke luar yang menyebabkan berkurangnya volume tanah, oleh karena itu akan terjadi penurunan pada tanah. Tujuan dari penelitian ini adalah untuk mengetahui dan membandingkan data hasil pengujian penurunan lapis tanah pada tanah gambut menggunakan metode sand drain dengan Pembebanan Bertahap pada kondisi Single Drain (Pola Segitiga dan Pola Segiempat). Pengujian dilakukan di Laboratorium Mekanika Tanah Universitas Lampung. Sampel tanah yang akan diteliti adalah tanah gambut pada kedalaman 20 cm. Pelaksanaan pengujian dilakukan dalam 2 tahap. Pertama adalah pengujian sifat fisik dan konsolidasi tanah gambut. Kedua adalah pengujian lama waktu pengeringan pada tanah gambut akibat pengaruh metode drainase menggunakan bahan pasir. Data yang didapatkan dari percobaan diolah, dan kemudian hasil perhitungan tersebut ditabelkan dan dibuat grafik. Dari penelitian ini didapatkan: Koefisien konsolidasi (Cv) untuk pola segitiga sebesar 0,00079 cm2/menit dan untuk pola segiempat sebesar 0,0028 cm2/menit, nilai indeks tekanan Cc untuk pola segitiga sebesar 2,5589 dan untuk pola segiempat sebesar 1,0041. Sehingga diambil kesimpulan : (1) Penggunaan metode sand drain dengan pola segiempat ternyata dapat menurunkan tanah lebih cepat daripada dengan pola segitiga (2) Nilai Cv (koefisien konsolidasi) sebelum pembebanan lebih besar daripada setelah pembebanan, sedangkan nilai Cc (indeks pemampatan) sesudah pembebanan lebih besar daripada sebelum pembebanan. Kata Kunci : Gambut, Single Drain, Konsolidasi