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All Journal Jurnal Sains Teknologi dan Lingkungan (JSTL) Jurnal Pengabdian Magister Pendidikan IPA GANEC SWARA Spektrum Sipil
WIRADARMA, LALU WIRAHMAN
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Law, Crime, Criminology & Criminal Justice Public Health Social Sciences Transportation

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PENGARUH PENETAPAN WAKTU HUJAN TERHADAP BESARNYA DEBIT BANJIR RENCANA NEGARA, I D G JAYA; WIRADARMA, LALU WIRAHMAN; YASA, I WAYAN; SAIDAH, HUMAIRO; SAADI, YUSRON; SULISTIYONO, HERI; RAI K W, I G AGUNG NGURAH
GANEC SWARA Vol 17, No 4 (2023): Desember 2023
Publisher : Universitas Mahasaraswati K. Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35327/gara.v17i4.628

Abstract

The aim of this study is to determine the discharge of rainwater runoff from different durations of rain, to determine the magnitude of the differences in the discharge of rainwater runoff produced, and to determine the differences in channel dimensions resulting from differences in the duration of rain used. This study uses 6 years of daily rainfall data recorded at Bengel Station, to calculate the planned flood discharge as an alternative for controlling rain runoff in the Green Asia Housing area with a land area of ±6 hectares, a test time was used with rain times selected as 24 hours and 5 hours. Flood discharge is calculated using the Rational formula with a rain return period of 2 years according to the design area. The results of data analysis will be presented in the form of tables, discussed and concluded descriptively.The results of the study show that there is indeed a quite large difference in flood discharge, where the use of a 24-hour rain period produces a planned discharge that is around 32% lower than the use of a 5-hour rain period. The dimensions of the channel produced for a discharge with a rain duration of 24 hours are also smaller than the dimensions produced by a flow discharge with a rain duration of 5 hours. The fact is that rain events with a duration of shorter than 24 hours are more common than rain events lasting a full day.
Evaluasi Dan Modifikasi Pola Tata Tanam Daerah Irigasi Prako Berdasarkan Ketersediaan Air Saidah, Humairo; Supriyadi, Anid; Wiradarma, Lalu Wirahman
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 10 No. 3 (2024): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v10i3.700

Abstract

Prako Weir in East Lombok Regency has limited water availability, which affects its ability to serve the provision of irrigation water. Failure to meet irrigation water needs is increasingly felt, so adaptation steps are needed to reduce more significant losses at the farmer level. This study aims to evaluate the current cropping pattern and obtain alternative cropping patterns that are more appropriate according to water availability in Prako Weir to minimize the potential for farmer crop failure. The study began by analysing water availability by calculating the mainstay discharge using a ranking method using Prako Weir discharge data. Continued analysing water requirements in the current cropping pattern and several alternative cropping patterns using the KP-01 method. Furthermore, the best cropping pattern was selected using the water balance method. The results obtained were the best cropping pattern according to the water availability pattern in Prako Weir, namely Rice-Soybeans-Soybeans, which began planting in early October, with an annual water surplus of 775.24 l/second. Meanwhile, the current cropping pattern, Rice-Rice-Soybeans, shows an annual deficit of 625.31 lt/second. However, if economic considerations are used, then the current planting pattern is still acceptable even though it is at risk of being unable to meet its water needs. However, a solution can be taken by providing water in turns.
Kebutuhan Dimensi Sumur Resapan untuk Pemukiman Padat di Kelurahan Mandalika Kota Mataram Saidah, Humairo; Sulistiyono, Heri; Wiradarma, Lalu Wirahman
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 2 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i2.866

Abstract

The rapid development of residential areas in Mataram City has led to significant changes in land use, potentially increasing surface runoff and causing issues such as surface ponding and localized flooding. One feasible solution to mitigate these impacts is the construction of infiltration wells as a form of sustainable and environmentally friendly drainage infrastructure. This study aims to provide technical guidance to the community in one of the densely populated sub-districts of Mataram City for determining the appropriate dimensions of rainwater infiltration wells based on field data. The design rainfall was estimated through frequency analysis using a normal distribution. Rainfall intensity was calculated using the Mononobe method, and runoff discharge was analyzed using the Rational method. Infiltration wells were then designed using the Sunjoto method and applied to residential units in the Mandalika Subdistrict, with variations in building area and land area (LB/LT) ranging from 24/60 to 60/70 square meters. Based on soil testing, the study area has an average soil permeability coefficient of 3.16 cm/hour and an average groundwater table depth of 2.45 meters. The results of the analysis for various house types from small to large, if the well is circular Ø 1.0 meters, then each house needs 1 well with a depth of between 1.14 meters to 1.97 meters, while for a well Ø 0.8 meters, it requires 1 well with a depth (H) between 1.76m to 3.03m. Especially for houses with a roof area of more than 60m2, a well with Ø 0.8 meters requires a depth exceeding the local groundwater level so it is recommended to make 2 or can also use Ø 1.0 meters. The dimensions of the well have been in accordance with the capacity requirements based on rainfall and the position of the local groundwater level.
Sosialisasi Perkerasan Ramah Lingkungan di Desa Medana Kecamatan Tanjung Yasa, I Wayan; Alit, I Dewa Made; Wiradarma, Lalu Wirahman; Sideman, Ida Ayu Oka Suwati; Setiawan, Agustono; Jayanegara, I Dewa Gede; Saidah, Humairo; Hasyim; Agastya, Dewandha Mas; Bawu, Mario Alfredo
Jurnal Pengabdian Magister Pendidikan IPA Vol 8 No 2 (2025): April-Juni 2025
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v8i2.11415

Abstract

Pembagunan permukiman dan pusat-pusat perekonomian di Desa Medana mengalami pertumbuhan yang sangat pesat seiring dengan perkembangan kabupaten Lombok Utara sebagai kabupaten baru. Semua aspek berkembang sangat cepat seperti permukiman, pertokoan, perkantoran maupun tempat-tempat pariwisata. Berbagai kebutuhan sarana dan prasarana penunjang pertumbuhan perkotaan tersebut seperti parkir, jalan, sistem dranase, pembuangan limbah, air bersih dan telokomunikasi. Salah satu dampak dari pertumbuhan tersebut yaitu penggunaan perkerasan permukaan lahan dengan menggunakan asphlat, beton serta paving block. Penggunaaan perkerasan tersebut yang rata-rata kedap air akan menyebabkan kecilnya volume air yang masuk ke dalam tanah sehingga menyebabkan terjadinya banjir, genangan dan turunnya permukaan air tanah. Dalam upaya mengurangi permasalah tersebut sangat diperlukan adanya inovasi sistem perkerasan ramah lingkungan yang tetap memberikan konstribusi terhadap air bawah permukaan, mengurangi banjir, konservasi air serta menjaga siklus air permukaan dan bawah permukaan. Pemanfaatan sistem perkerasan grass block paving atau dengan grass block dengan pengisi material alam (batu pecah atau coral) akan dapat mengurangi terjadinya genangan atau banjir, dimana air limpasan permukaan akan masuk kedalam tanah melalui pori paving block. Sehingga dengan demikian limpasan dapat dikurangi dan air yang masuk menjadi infiltrasi akan selalu tetap dijaga. Pelaksanaan pengabdian diikuti oleh seluruh perangkat desa, masyarakat, tokoh masyarakat, karang taruna, serta mahasiswa kuliah kerja nyata Universitas Mataram
Sosialisasi Kesiapsiagaan Gempa Bumi sebagai Upaya Mitigasi Bencana di Desa Jembatan Kembar Timur Kabupaten Lombok Barat Saidah, Humairo; Muhajirah; Wiradarma, Lalu Wirahman; Rohani; Hasyim; Karyawan, I Dewa Made Alit; Negara, I Dewa Gede Jaya; Yasa, I Wayan; Supriyadi, Anid
Jurnal Pengabdian Magister Pendidikan IPA Vol 8 No 2 (2025): April-Juni 2025
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v8i2.11626

Abstract

East Jembatan Kembar Village is located in an earthquake-prone area in West Lombok Regency, making it essential to enhance community capacity in disaster preparedness. This outreach activity aimed to increase community awareness of earthquake preparedness and to initiate the formation of a community-based structure capable of acting during emergencies. The method used included face-to-face counseling and participatory discussions involving the village head, village staff, community leaders, youth, and local residents. Topics covered included basic knowledge of earthquakes, appropriate actions before, during, and after an earthquake, and the importance of forming a Community Disaster Resilience Group (KMTB). Although the activity was conducted in the morning and received enthusiastic support from the village government, public participation was limited due to time constraints with residents' daily work routines. Nevertheless, the activity successfully delivered key information to attendees and led to the formation of the Community Disaster Resilience Group as a continuation of the program. This group is recommended for immediate formalization by the village government so that it can establish statutes and bylaws, build cross-sector coordination, and fulfill its role in preparedness and emergency response. The results demonstrate that collaborative efforts between local authorities and communities can be an effective strategy for building village resilience to disasters.
- STUDI EFEKTIVITAS ALAT BERAT I-CONSTRUCTION DALAM PENINGKATAN PRODUKTIVITAS PEKERJAAN TANAH DI TAKANERIKI, JEPANG: Study of i-Construction Heavy Equipment Effectiveness on Productivity for the Land Clearing Project in Takaneriki, Japan Sugian, Ahmad; Sideman, Ida Ayu Oka Suwati; Wiradarma, Lalu Wirahman
Spektrum Sipil Vol 12 No 2 (2025): SPEKTRUM SIPIL
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/spektrum.v12i2.409

Abstract

Industri konstruksi saat ini mengalami transformasi digital melalui pemanfaatan i-construction yang mengintegrasikan Building Information Modeling (BIM), pemetaan UAV, serta sistem otomatisasi pada alat berat. Studi ini menganalisis efektivitas i-construction yang mengintegrasikan machine control dan machine guidance di bandingkan metode konvensional pada pekerjaan tanah di Takaneriki, Kota Taketa, Prefektur Oita, Jepang. Dengan parameter: produktivitas, tenaga kerja, biaya sewa alat dan kualitas presisi. Hasil menunjukkan peningkatan produktivitas signifikan: excavator naik 26,9% dan bulldozer naik 28,2%. Meski biaya sewa alat i-construction lebih tinggi (excavator +179,18% dan bulldozer +171,18%), efisiensi dicapai melalui pengurangan tenaga kerja dari tiga menjadi satu orang dan percepatan waktu kerja. Hal ini menurunkan biaya tenaga kerja lebih dari 60% dan menghemat total biaya proyek sebesar 19,11%. Dari aspek kualitas presisi, deviasi pekerjaan sangat rendah (6,0 cm pada tanggul dan 2,4 cm pada perataan ladang), jauh di bawah toleransi, sehingga meminimalkan rework. Temuan menegaskan i-construction meningkatkan produktivitas, efisiensi biaya, dan presisi.
Co-Authors Agastya, Dewandha Mas Agustono Setiawan Alit, I Dewa Made Bawu, Mario Alfredo Hasyim Heri Sulistiyono, Heri Humairoh Saidah I Dewa Gede Jaya Negara I Wayan Yasa, I Wayan Ida Ayu Oka Suwati Sideman JAYANEGARA, I DEWA GEDE Karyawan, I Dewa Made Alit Muhajirah NEGARA, I D G JAYA RAI K W, I G AGUNG NGURAH Rohani Sugian, Ahmad SUPRIYADI, ANID Yusron Saadi