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Lake Cliff Landslide Mitigation – A Case Study of Lut Tawar Peusangan Lake, Aceh, Indonesia

Amri Ulil, Azizah Cut, Ernawita, Robo Sarif, Nuraida, Ismy Romaynoor, Sastriawan Halus

Journal of Ecological Engineering

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2023

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Vol. 24, nr 2

165--172

EN

Landslide is one of the most common natural disasters in Indonesia. In Lut Tawar Lake, specifically the cliff side, the landslide event occurs almost daily. Mitigation effort becomes a necessity following the fatality cases it causes. This study aimed to identify landslides and suitable mitigation for the case of Lut Tawar’s lake cliff. A combined approach of landslide survey and image interpretation with field validation was used. In addition, local vegetation surrounding the case area was identified from the survey and interview process. The results showed there are in total 37 landslide points in the study area. The conducted analysis showed the landslide was mainly caused by land use change from forest to a plantation, slope, particularly in the cliff area that was carved for road development, the volcanic geology of Bukit Barisan mountain, rainfall intensity, and the equatorial rainfall characteristic of the study area. The results also suggest the finest solution for landslide mitigation, namely the eco-engineering approach, a revegetation method using the local vegetation. Local vegetation comprises multiple strata, of which grass in the below strata, shrubs in the middle strata, and trees in the upper strata, constitute a shield for the lake cliff. Within this structure, government and community can cultivate these plants in the surrounding lake area.

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Geomitologia kraterów kolizyjnych i zjawisk impaktowych

Telecka M.

Przegląd Geologiczny

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2017

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Vol. 65, nr 7

427--431

EN

Meteorite craters are unique, and sometimes distinctive sites whose formation was accompanied by catastrophic events. That could not have gone unnoticed by people who try to explain the circumstances and causes of crater formation. This article presents meteorite craters in religions and oral stories (geomythology), which accurately interpret theseforms and phenomena. All stories (except present myths) indicate that the authors of geomyths had an exceptional perceptiveness and ability to draw logical (in their state of the art) conclusions, often many years before cosmically origin of crater was scientifically explained.

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The effect of CO2 on the measurement of 222Rn and 222Rn with instruments utilising electrostatic precipitation

Lane-Smith D., Sims K.

Acta Geophysica

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2013

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Vol. 61, no. 4

822--830

EN

In some volcanic systems, thoron and radon activity and CO2 flux, in soil and fumaroles, show a relationship between (220Rn/222Rn) and CO2 efflux. It is theorized that deep, magmatic sources of gas are characterized by high 222Rn activity and high CO2 efflux, whereas shallow sources are indicated by high 220Rn activity and relatively low CO2 efflux. In this paper we evaluate whether the observed inverse relationship is a true geochemical signal, or potentially an analytical artifact of high CO2 concentrations. We report results from a laboratory experiment using the RAD7 radon detector, known 222Rn (radon) and 220Rn (thoron), and a controllable percentage of CO2 in the carrier gas. Our results show that for every percentage of CO2, the 220Rn reading should be multiplied by 1.019, the 222Rn radon should be multiplied by 1.003 and the 220Rn/222Rn ratio should be multiplied by 1.016 to correct for the presence of the CO2.

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Walory geoturystyczne aktywnych wulkanów Włoch

Stanienda K.

Zeszyty Naukowe. Górnictwo / Politechnika Śląska

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2007

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z. 280

167-177

PL

W artykule przedstawiono walory geoturystyczne, geologiczne, krajoznawcze, historyczne, kulturowe oraz przyrodnicze aktywnych wulkanów Włoch. Szczegółowo omówiono walory Wezuwiusza, wulkanów Wysp Eolskich oraz Etny, reprezentujących stratowulkany o typie erupcji Pliniusza, Vulcano lub Stromboli.

EN

Geoturistic values- geological, historical, cultural, sight-seeing and natural values of the active volcanoes of Italy were presented in this article. In details were described values of Vesuvius, Volcanoes of Eolian Islands and Etna. They are stratovulcanoes, which present Plinian, Vulcanoe or Stromboli activity.