Tujuan penelitian ini adalah untuk memetakan potensi air tanah di Desa Babakan, Kecamatan Sandubaya, Kota Mataram, Propinsi Nusa Tenggara Barat. Metode Geolistrik yang digunakan adalah Vertical Electrical Sounding (VES) dengan konfisurasi Elektroda Schlumberger. Peta resistivitas 3 dimensi menujukkan sebaran batuan dan potensi air tanah yang ditunjukkan oleh nilai resistivitas listrik yang rendah. Dari analisis resistivitas yang dihasilkan pada survey ini didapatkan kedalaman water table minimum 32.0 m dan kedalaman maksimum sebesar 55.6 m. Dari selisih ketinggian dan dikombinasikan dengan data geologi dan petrologi porositas batuan, didaptkan bahwa debit air yang tersedia di area survey sebesar 17.63 liter/detik. Keywords: Geolistrik, Pemetaan, Air Tanah
Based on its geographical location, West Nusa Tenggara Province is located in a disaster-prone area. Because generally disaster hazards can occur anywhere with little or no warning, it is very important to be prepared for disaster hazards to reduce the risk of their impacts. One of the most strategic efforts is through learning or training to improve the ability of the community to respond to disasters by creating a Disaster Preparedness School. The purpose of this activity is to realize the implementation of disaster management activities in schools / madrasas. The method used is (a) direct instruction to improve partner understanding related to disaster and disaster mitigation materials, (b) Group Discussion Forum to develop disaster learning modules and (c) simulations to improve disaster response partner skills. This activity will be held in the Qomarul Huda Narmada Forest High School in West Lombok-NTB. The output target of this activity is the formation of an evacuation route map as well as an explanation and the establishment of a disaster learning module that can be used in the learning process. It is hoped that by developing disaster preparedness school programs will contribute effectively to early prevention of disaster hazards.Keywords: Disaster Preparedness School, disaster mitigation, earthquake.
The Lombok earthquake in 2018 was unique, the shocks occurred sequentially. Several major earthquakes were followed by thousands of aftershocks. The earthquake caused a devastating disaster which destroyed many homes, buildings including wells as the main fresh water supply in the Lombok Island. The focal mechanism of main earthquake shows a thrust fault mechanism. Lombok Island is originally a volcano Island which is still growing actively. Therefore surface of Island is dominated by volcanic materials, such as: volcanic rock, volcanic ash, pumice. This paper describes the phenomenon of sanding wells in Lombok, including the physical mechanisms among rock’s grains when vibrating earthquake waves. These earthquake waves can eliminate static friction between grains and reduce cohesion between grains of rock. Some subsurface images shows a strong correlation between damage grade and the existence of loose sand and hard rock.
The Bengkaung area, Batulayar District, West Lombok is suspected to be very vulnerable to the risk of earthquake hazards. However, in this area no scientific research, either geological or geophysical, has ever been carried out regarding this hazard. How are the physical characteristics of the lithology and structure in the area to the risk of earthquake disaster? The purpose of this study was to determine the physical characteristics of the lithology and subsurface structures that were validated by the level of damage. The method used is the geoelectric method and local building damage data. The results of the 2D geoelectric anomaly modeling show the characteristics of the subsurface lithological layers in the form of sand, sandstone, clay, andesite lava faults, fresh andesite lava, and granite. The fault was detected in the center of the study area in a north-south direction. Earthquake hazard analysis shows that the cause of the high risk of earthquake hazard in Bengkaung Village is the presence of faults and cohesive lithology. The highest potential risk is in the southern part of Bengkaung Village. The southern area of Bengkaung Village is dominated by clay that has cohesive properties, especially on the surface. The western and northern parts of Bengkaung Village have medium and low vulnerability to earthquake hazards. The last two areas are dominated by non-cohesive soils in the form of sandy soils and lapilli pumice
Kegiatan praktikum memiliki peran sentral sebagai tempat untuk demonstrasi dan juga merupakan inti proses belajar sains. Pada kegiatan pengabdian yang dilakukan di MTS Qomarul Huda Lombok Baratterlihat masih banyak guru-guru Sains yang belum mengiringi kegiatan belajar sains dengan kegiatan praktikum. Ironisnya lagi, sekolah-sekolah tersebut sebenarnya telah memiliki KIT IPA, namun masihterkendala dengan kemampuan atau pemahaman guru tersebut dalam mengoperasikan atau mendemonstrasikan KIT IPA sehingga hanya menjadi pajangan saja. Menyikapi hal tersebut kami timPengabdian Prodi Fisika FMIPA melakukan pelatihan penggunaan alat KIT IPA bagi Guru Sains untuk meningkatkan efektivitas penggunaan KIT IPA dalam pembelajaran Sains. Metode yang digunakan dalamkegiatan ini adalah Direct Instruction dan Cooperative learning dimana guru–guru memberikan pelatihan dasar-dasar konsep fisika dari empat KIT IPA yang tersedia yaitu Kit Mekanika, Kit Panas dan Hidrostatistika,KIT Optik, dan Kit Listrik Magnet. Pelatihan merakit KIT IPA sesuai eksperimen yang telah dirancang juga dilakukan. Dari kegiatan pendampingan dan pelatihan yang telah dilakukan dapat menghasilkan (1) Guru MTS Qomarul Huda Lombok Barat mampu merancang pembelajaran Sains yang diiringi dengan kegiatan praktikum, khususnya dengan menggunakan KIT IPA. (2) Guru sekolah menengah mampu menggunakan KIT IPA yang telah tersedia di sekolah.
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