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Eko Pradjoko
Jurusan Teknik Sipil Fakultas Teknik, Universitas Mataram
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Koreksi Bias Data Hujan Luaran GCM ECHAM5 Untuk Prediksi Curah Hujan Bulanan dan Musiman Pulau Lombok: Bias Correction for GCM ECHAM5 Model Rainfall Data Output in Estimating Monthly and Seasonally Rainfall for Lombok Island Humairo Saidah; Agustono Setiawan; Lilik Hanifah; Eko Pradjoko; Agus Suroso
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 2 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i2.289

Abstract

This study aims to evaluate the ability of the ECHAM5 GCM model output data in estimating monthly rainfall on the island of Lombok. The data used in this study are ECHAM5 monthly rainfall data and automatic rainfall recorder (ARR) measurement rain data for 2000-2018 obtained from ARR Gunung Sari. Correction of bias is conducted by using the mean ratio method and the regression method. The method that produces the best approach is then used to obtain rain data projections and a simple regression method. Evaluation and validation used the Pearson correlation coefficient (r), Root Mean Square Error (RMSE) and Nash-Sutcliffe Efficiency (NSE) values. The results obtained are that the daily and monthly rainfall data from the ECHAM5 model cannot be directly used to replace the rain measurement data because of its very low accuracy. The downscaling technique performed on daily and monthly rainfall data using the average ratio method does not show satisfactory performance where the efficiency figures produced are still low even gave a slight increasing number. However, the ECHAM5 model data can be used to obtain rainfall projections on a monthly and seasonal scale with a good and satisfactory correlation.  Key words: mean ratio method; global climate model; ECHAM5; monthly rainfall.
SIMULASI PENJALARAN GELOMBANG TSUNAMI DI PESISIR SELATAN LUNYUK KABUPATEN SUMBAWA Mawardin, Adi; Pradjoko, Eko; Suroso, Agus
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4499

Abstract

An earthquake accompanied by a tsunami disaster occurred along the southern coast of Sumbawa, Lombok, and Bali on August 19, 1977. The potential for future earthquakes and tsunamis in the region warrants significant attention. This study aims to determine the tsunami wave travel time, wave height, tsunami run-up, and inundation distance. The research was conducted at Lunyuk Beach in Sumbawa, specifically at Teluk Lampui. The methodology involved in-depth interviews with survivors of the 1977 Sumba earthquake and tsunami, as well as field measurements. Research data included earthquake fault parameters, bathymetric maps, and coastal slopes. Tsunami propagation simulations were performed using COMCOT V1.6 software. The simulation results were validated against field observation data. Based on interviews and field measurements, it was found that the tsunami run-up height reached the roofs of houses, estimated at 6.30 meters based on similar house heights during the event. The simulation analysis of layer 01, using earthquake fault data, indicated that the tsunami reached the Lunyuk coast after 15 minutes. Layer 02 analysis aimed to determine tsunami run-up heights with wave scenarios of 7 meters, 8 meters, and 9 meters, resulting in run-up depths of 6.85 meters, 7.48 meters, and 7.92 meters respectively. The corresponding wave heights were measured at 14.38 meters, 16.35 meters, and 17.70 meters. The tsunami inundation distances for each scenario were 1,513 meters, 1,528 meters, and 1,532 meters respectively. This demonstrates that higher tsunami waves lead to greater run-up heights and longer inundation distances on land. Validation results showed that a 7-meter wave height closely matched the conditions during the 1977 Sumba earthquake tsunami event.
Kajian Risiko Bencana Di Desa Dadap Kecamatan Sambelia Kabupaten Lombok Timur Oktorani, Lina Karolina Dori; Ratna Ayu Istiani; Ari Kusuma Mar'i; Boyke Feril Hidayat; Adhe Putri Aprillyana; Rowi Ashari; Ismul Azam Magani; Jihadul Muslimin; Nur Haerani; Pradjoko, Eko
Portal ABDIMAS Vol. 2 No. 1 (2024): Jurnal PORTAL ABDIMAS
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/portalabdimas.v2i1.4004

Abstract

Sesuatu yang mengancam kehidupan orang banyak berdasarkan faktor alam ataupun nonalam disebut dengan bencana. Bencana merupakan hal yang sangat berisiko karena bukan hanya merugikan materil tetapi juga nyawa. Untuk mengantisipasi bencana perlu dilakukan peninjauan risiko bencana. Risiko bencana di kenali melalui kajian bahaya yaitu bencana apa saja yang dapat menimbulkan bahaya. Kerentanan wilayah, yaitu kondisi wilayah yang menentukan bahaya bencana. Kemudian kapasitas, yaitu kemampuan sumber daya yang tersedia dalam mehadapi bahaya. Desa dadap, merupakan salah satu desa yang bisa dikaji risiko bencananya guna menuju desa tanguh bencana. Untuk mengkaji itu semua di perlukan metode-metode agar penanganan risiko bahaya tepat dilakukan. Desa Daddap memiliki potensi bencana banjir, kekeringan, dan gempa bumi. Masing-masing bencana memiliki risiko sedang dan tinggi. Untuk mengurangi hal tersebut kapasitas masyrakat desa perlu di tingkatkan. Upaya dalam pembentukan satgas juga merupakan langkah dalam pengurangan risiko bencana dan kesiapan menuju desa tangguh bencana.
Desa Labuhan Haji Tangguh Bencana Tsunami Sulistiyono, Heri; Saadi, Yusron; Hartana; Pradjoko, Eko; Mahendra, Made; Julkifli
Portal ABDIMAS Vol. 2 No. 1 (2024): Jurnal PORTAL ABDIMAS
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/portalabdimas.v2i1.4388

Abstract

Tsunami merupakan bencana alam yang mengancam semua kehidupan di pesisir. Kekuatan merusak dari bencana tsunami ini tergantung dari tinggi gelombang tsunami tersebut. Salah satu desa di Pulau Lombok yang terancam oleh bencana tsunami adalah Desa Labuhan Haji Kecamatan Labuhan Haji, Kabupaten Lombok Timur. Hal ini disebabkan oleh letak geografis dan topografis desa yang berada di pesisir Timur Pulau Lombok menghadap ke Selat Sumbawa. Oleh karenanya, Penulis beserta tim pengabdian kepada masyarakat dari Universitas Mataram mengupayakan suatu program Desa Tahan Bencana (DESTANA) yang disampaikan kepada desa dengan tujuan agar Desa Labuhan Haji ini mempunyai ketahanan terhadap bencana tsunami. Program ini bertujuan memberikan wawasan dan informasi mengenai potensi bahaya tsunami dan cara-cara penanggulangan kerugian. Metode pelaksanaan dalam program ini, yaitu Pra-kegiatan meliputi: survei lokasi, melakukan kerjasama dengan staf dan kepala desa, menjalin kemitraan, dan pelaksanaan penyuluhan dan pembelajaran dengan video. Teknologi yang diperkenalkan adalah: (1) WRS-BMKG, (2) Magma Indonesia, (3) My Earthquake Alerts, (4) EQInfo, dan (5) Sistem Peringatan Dini Multibahaya Geo-Hidrometeorologi. Berdasarkan hasil test awal dan test akhir dapat diketahui bahwa terdapat peningkatan pengetahuan dan pemahaman peserta tentang desa tangguh bencana, yaitu dari 47% menjadi 82%. Dengan demikian, kegiatan pengabdian ini telah meningkatkan pengetahuan dan pemahaman masyarakat yang tinggal di daerah rawan tsunami untuk berpartisipasi dalam mendukung program Desa Tangguh Bencana.
Penyuluhan Dan Simulasi Tanggap Gempa Untuk Peningkatan Kesiapsiagaan Guru Dan Siswa SDN 1 Jembatan Kembar Timur Saidah, Humairo; Saadi, Yusron; Pradjoko, Eko; Ali, AM
JURNAL KARYA PENGABDIAN Vol. 7 No. 1 (2025): April, Jurnal Karya Pengabdian
Publisher : Jurusan Teknik Mesin FT Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jkp.v7i1.197

Abstract

SDN 1 Jembatan Kembar Timur is located in West Lombok Regency, which is in a zone with a medium-high risk of earthquakes and tsunamis, so its residents must be prepared to face it, including schools that are gathering places for many young students who are at risk of panic during an earthquake. This community service activity aims to transfer information through counseling and earthquake simulations to train the preparedness of teachers and students. This activity was carried out using the counseling and simulation method, which was attended by teachers and grade 6 students. The results obtained from this activity were that teachers and students experienced increased knowledge and preparedness for earthquakes. The evaluation tool that measures the success of this activity shows an increase in knowledge of 30% at the end of the activity. A significant increase was especially shown in understanding what should be done during an earthquake when someone is in a class and a high building. This significant increase in knowledge of teachers and students is essential in advancing preparedness for earthquake disasters
PENINJAUAN RISIKO BENCANA DI DESA DADAP KECAMATAN SAMBALIA KABUPATEN LOMBOK TIMUR Pradjoko, Eko; Oktorani, Karolina Dori; Istiani, Ratna Ayu; Mar’i, Ari Kusuma; Hidayat, Boyke Feril; Aprillyana, Adhe Putri; Ashari, Rowi; Magani, Ismul Azam; Muslimin, Jihadul; Haerani, Nur
Jurnal Wicara Vol 2 No 1 (2024): Jurnal Wicara Desa
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/wicara.v2i1.4068

Abstract

ABSTRACT Something that threatens and disrupts the lives of many people based on natural or non-natural factors is called a disaster. Disasters are very risky because they not only harm material things but also lives. To anticipate disasters, it is necessary to conduct a disaster risk review. Disaster risk is identified through hazard studies, namely any disaster that can cause danger. Regional vulnerability, namely regional conditions that determine the danger of disaster. Then capacity, namely the ability of available resources to face danger. Dadap village is one of the villages where disaster risk can be studied in order to become a disaster resilient village. To study all of this, methods are needed so that the risk of danger is handled appropriately. Efforts to form a task force are also a step in reducing disaster risk and preparing for disaster-resilient villages.
Perbandingan Gradasi Butiran Sedimen Terendap Waduk Batujai dengan Material Bahan Kerajinan Gerabah Bukit Balibe Saadi, Yusron; Tampang, Tampang; Salehudin, Salehudin; Suroso, Agus; Pradjoko, Eko; Estyana, Ema; Rohmayani, Hairun Nisak; Aslam, Firar Bismi; Supardi, Supardi; Ihsan, Ihsan; Aji, Eko Usman
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.781

Abstract

Sediment deposition is the main problem in the continuity of dam operations. Sustainable operation of dam can be maintained by dredging sediment deposited at the bottom of the impounding area. Because of the considerable costs and the lack of economic value of dam deposited sediment, dredging is carried out only when the serious sedimentation problem occurs. This research aims to analyse samples of sediment taken from various depths of Batujai Dam and to compare them with the pottery materials of Balibe Hill. Compositions of deposited sediment were analyzed to determine its potential as an alternative additional material used in pottery making. Comparisons were made based on the results of sieving analysis of material from both sources. The results show that the percentage of fine-grain material of Balibe Hill, especially grains with a diameter of ≤ 0.18 mm, is closer to the percentage of deposited sediment of Batujai Dam at an elevation of 92.5 masl and an elevation of 90.0 masl, while the percentage of coarse-grain material with a diameter of ≥ 3.35 mm is closer to the percentage of deposited sediment at an elevation of 87.5 masl. Gradation analysis indicates that composition of deposited sediment of Batujai Dam in sand grain classes can be engineered to some extent to make them closely identical to the composition of Balibe Hill materials so that it can be used as a mixture in pottery making.
The Planning of Revetment For Coastal Protection of Candikusuma Jembrana Bali Najmi Nurgitasari; Eko Pradjoko; Agus Suroso
International Journal of Mechanical, Electrical and Civil Engineering Vol. 2 No. 2 (2025): April: International Journal of Mechanical, Electrical and Civil Engineering
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijmecie.v2i2.267

Abstract

Candikusuma Beach in Bali has experienced significant erosion since 2009, threatening public facilities, including a mosque in Candikusuma village. This issue is critical as it affects a coastal fishing community. To mitigate the erosion, a revetment structure using concrete block armor is proposed. This revetment aims to protect the coastal cliff from wave forces and prevent further erosion. The planning process begins with analyzing bathymetric and topographic data to assess land and sea conditions. Tidal analysis determines key water elevations, while wind data is used to calculate maximum and average wind speeds and directions. Wave hindcasting, based on wind data and effective fetch length, provides estimates of wave height and period. Shoreline changes are evaluated by comparing satellite imagery from 2003 and bathymetric surveys from 2012, revealing an average shoreline retreat of 21.70 meters over nine years. The design of the revetment includes a crest elevation of +3.70 meters MSL, constructed on a base at -0.5 meters MSL. The concrete foundation extends to a depth of -1.5 meters MSL. Hindcasting results show maximum wave heights of 1.21 to 1.50 meters from the southwest, with an average wave height of 0.01 to 0.30 meters from the south. The design wave height for a 25-year return period is 1.37 meters with a period of 4.58 seconds, resulting in a wave height of 1.31 meters at a depth of 2 meters. The estimated budget for the 200-meter-long revetment is Rp. 7,778,174,000.
Penyuluhan Irigasi Tetes Pada Masyarakat Di Dusun Dasan Tereng Desa Gumantar Kabupaten Lombok Utara Negara, I Dewa Gede Jaya; Karyawan, I Dewa Made Alit; Rohani; Suparjo; Supriyadi, Anid; Budianto, M Bagus; Setiawan, Ery; Suroso, Agus; Sulistiyono, Heri; Eniarti, Miko; Pradjoko, Eko; Saadi, Yusron
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.v8i2.11210

Abstract

The Gumantar Village community is a community located in the hills with terraced and sloping village conditions. Most of the community has yards and gardens, although not very large with terraced land conditions. The water source of the Gumantar Village Community comes from the upstream hillsides, with the number of hamlets as many as 16 hamlets with a population of around 2000 people and most of them are field farmers. Considering the potential of the surrounding land which is very large and in the form of terraces, it is necessary to provide counseling to the community on how to utilize limited water sources for farming activities with a drip irrigation system. To help the community, counseling is needed so that the community quickly understands the drip irrigation system. This community service aims to provide efficient irrigation counseling, namely drip irrigation, to encourage farming to be carried out around the yard. The community service consists of location survey activities, counseling, discussion and question and answer sessions, and evaluation. This community service has succeeded in providing counseling to 35 people consisting of housewives and fathers, as well as young people from the Dasan Tereng Hamlet mosque. Participants have gained knowledge about drip irrigation and obtained examples of the use of drip irrigation in yards and dry land, so that people are able to utilize limited water in the dry season for agricultural purposes in their yards
Penyuluhan Biopori Pada Masyarakat Di Dusun Dasan Tereng Desa Gumantar Kabupaten Lombok Utara Provinsi Nusa Tenggara Barat.: Resapan Biopori Negara, I Dewa Gede Jaya; I Dewa Made Alit Karyawan; Rohani; Hasim; Anid Supriyadi; Humairo Saidah; Ery Setiawan; I Wayan Yasa; Salehudin; Eko Pradjoko
Jurnal Pengabdian Magister Pendidikan IPA Vol 8 No 3 (2025): Juli-September 2025
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v8i3.12657

Abstract

Masyarakat Desa Gumantar merupakan kondisi perkampungan berterasering dan berlereng, sebagian besar Masyarakat memiliki lahan pekarangan yang belum dimanfaatkan. Desa Gumantar berasal dari dilereng perbukitan dengan jumlah dusun yang ada sebanyak 16 dan sebagian besar masyarakatya sebagai petani ladang. Memperhatikan potensi lahan pekarangan yang ada belum dimanfaatkan optimal, maka perlu disentuh dengan pemanfaatan lahan untuk peresapan air dimusim hujan melalui penyuluhan Biopori, dengan tujuan membantu masyarakat agar dapat berperan aktif dalam pelestarian lingkungan. Pengabdian terdiri dari kegiatan survey lokasi, penyuluhan, diskusi dan tanya jawab serta evaluasi. Pengabdian ini telah berhasil memberi penyuluhkan pada 30 masyarakat dan pemuda remaja masjid Dusun Dasan tereng. Peserta telah memperoleh pengetahuan tentang resapan Biopori dengan contoh cara pemasangannya pada lahan pekarangan.
Co-Authors Adhe Putri Aprillyana Agastya, Dewandha Mas Agus Suroso Agus Suroso Agus Suroso Agustono Setiawan Aji, Eko Usman Akmaludin Akmaludin, Akmaludin Ali, AM Anid Supriyadi Aprillyana, Adhe Putri Ari Kusuma Mar'i Ashari, Rowi Aslam, Firar Bismi Bambang Harianto Boyke Feril Hidayat Budianto, M Bagus Dewi, Evrianti Syntia Eniarti, Miko Ery Setiawan Ery setiawan Estyana, Ema Haerani, Nur Hartana Hasim Hasyim hasyim, hasyim Heri Sulistiyono Heri Sulistiyono, Heri Hidayat, Boyke Feril Humairoh Saidah I Dewa Gede Jaya Negara I Wayan Yasa I Wayan Yasa, I Wayan Ida Ayu Oka Suwati Sideman Ihsan Ihsan Ismul Azam Magani Istiani, Ratna Ayu Jihadul Muslimin Julkifli Karyawan, I Dewa Made Alit Lanura, Baiq Septiarini Lilik Hanifah M Bagus Budianto Made Mahendra Magani, Ismul Azam Mahendra, Made Mar’i, Ari Kusuma Mawardin, Adi Merdana, I Nyoman Miko Eniarti Muhtadi, Muhammad Fauzan Muslimin, Jihadul Najmi Nurgitasari Noya, Yunita A. Nur Haerani Oki Setyandito, Oki Oktorani, Karolina Dori Oktorani, Lina Karolina Dori PRACOYO, ATAS Prayoga, Haris Rahman Rahman Ratna Ayu Istiani Ratuluhain, Eva Susan Rohani Rohmayani, Hairun Nisak Ronald Darlly Hukubun Rowi Ashari Salehudin Salehudin, Salehudin Supardi Supardi Suparjo SUPRIYADI, ANID Tampang, Tampang Veithzal Rivai Zainal Yusron Saadi Yusron Saadi