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Posted by Dominic on February 20, 2006, 3:49 pm I think its multi-factorial 1. Soil - the soild condition in that area are composed of weathered and fractured rocks which have poor stability. Its common among areas of volcanic material and active fault zones. compare the Southern Leyte 2006 landslide to the following similar events: 1971 - Landslide from Nevado de Huascaran buried 17,000 people in the town of Yungay and Ranharica in Peru
Message modified by administrator Dominic February 20, 2006, 3:53 pm
What do you think caused the landslide at St. Bernard, Southern Leyte?
2. Precipitation - the continuous rains for 5 days made the soil "super-saturated", making it loose and ready to slide-off
3. Vegetation - forest cover was reduced to coconuts and other cash crops which have shallow roots. There is less resistance to erosion with these conditions.
1985 - a glacier melts in Nevado del Ruiz's minor eruption unleashing lahars that killed 23,000
1991 - flashfloods with mudslides killed 8,000 in Ormoc City, Leyte
1998 - mudslides in Casita volcano, Nicaragua, Tegucigalpa,Honduras after Hurr. Mitch kills 12,000
1999 - more than 50 were killed when a soil slump and landslide destroyed a residential subdivision in Antipolo city, Rizal
2003 - a week or rains kill almost 200 people in different areas of Panaon Island, Southern Leyte
2004 - a series of four typhoons sent landslides, mudslides and floods to Nueva Ecija, Aurora and Quezon killing more than 600
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