Updating geomorphic features of watersheds and their boundaries in hazardous areas using satellite synthetic aperture radar
| Autor: | F. Canisius, Mitsuharu Tokunaga, Kiyoshi Honda |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | International Journal of Remote Sensing. 30:5919-5933 |
| ISSN: | 1366-5901 0143-1161 |
| DOI: | 10.1080/01431160902791879 |
| Popis: | Volcanic disasters can cause severe loss of human life and damage to property. The main damage is caused during an eruption and from subsequent erosion of deposited materials. Heavy rainfall in volcanic areas erodes volcanic deposits, mainly pyroclastic flows and ash fall deposits, which flow as lahar to the foothill of the mountain and cause drastic damage to economically important areas. This post-eruption disaster becomes complex due to the occurrence of stream captures and watershed breakouts that lead to devastating lahars. Continuous monitoring of such geomorphic and hydrologic changes is necessary to cope with changing hazard conditions. Therefore it is important to update the watershed boundaries in order to study current hazard conditions and develop mitigation plans for future disasters. Changes of geomorphic and watershed boundary have occurred in the Mayon Volcano in the Philippines mainly as a result of a major volcanic eruption of 1993, due to which mitigation structures were constructed and... |
| Databáze: | OpenAIRE |
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