Delimiting the effects of lahars at Fuego volcano, Guatemala,during the next significant tropical storm
Başlık çevirisi mevcut değil.
- Tez No: 720970
- Danışmanlar: DR. MATTHEW WATSON
- Tez Türü: Yüksek Lisans
- Konular: Jeoloji Mühendisliği, Geological Engineering
- Anahtar Kelimeler: Modelling, ESRI ArcGIS, Spatial data, DEM, tropical storm, lahar, hazard mitigation, hazard assessment, Laharz, LaharFlow, Matlab
- Yıl: 2020
- Dil: İngilizce
- Üniversite: Unıversıty Of Brıstol
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
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Özet (Çeviri)
Lahars are debris flows formed by the combination of volcanic material with water. They, can develop in large volumes and speeds, and cause loss of life and damage to property. Fuego volcano, Guatemala is a highly active volcano, where and lahars occur frequently. The occurrence of lahars in tropical conditions with high rainfall can increase their volume and destructiveness. Modelling of lahars, determination of hazardous areas, and ready evacuation plans in case of possible danger will minimise loss of life and property. For this purpose, lahars were modelled at Fuego, and impact areas that may occur in a tropical storm were calculated. The focus was on the Ceniza Valley, due to significant nearby population centres, using two different hazard models, Laharz and LaharFlow. Potential hazard areas were identified by evaluating results of the two models, together with the advantages and disadvantages of both programs. We found that for a lahar to occur in the Ceniza valley, there must be more than 10- mm of precipitation. Also, we determined that the Plataranes and Melina streams converge in the Ceniza valley, this potentially increases the lahar volume in the Ceniza valley. We have seen that lahars occurring of volumes larger than 106 m3 will adversely affect the settlements of Las Palmas, Ingenio Pantaleon, Siquinala, Panimache, Morelia, Los Yucales, La Rochela and San Andres Osuna. We have presented our ideas on how evacuations might be undertaken and what could be done to reduce the risks.
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