This study was carried out to determine the distribution of factors as affected by debris flow in Ulsan and Busan metropolitan areas because mainly debris flow caused by typhoons and local heavy rainfall events is mainly attrubuted to damage of human...
This study was carried out to determine the distribution of factors as affected by debris flow in Ulsan and Busan metropolitan areas because mainly debris flow caused by typhoons and local heavy rainfall events is mainly attrubuted to damage of human being ad property.
The high risk degree of debris flow was to affected by east(20%), northeast(20%) and northwest(20%) slopes with Ⅳ stand age class with elevation(69%) of 100-200(33%).
Also, the risk was high in high erosia collapse degrea with slose degree of 20-25° with over 300mm(100%) of maximum daily rainfall events and 50-100mm(50%) or >100mm(50%) of maximum hourly rainfall events with <5km of stream path and <50ha of catchment area.
Landslide debris and wood residue flow was also related to igneous rocks(73%) and bank collapse types of debrs flow(57%).