Author(s): Richmond Dave Camingawan; Anne Jeanette De La Rosa; Elaine Marie Pena; Roy Anthony Luna
Linked Author(s): Richmond Dave Camingawan
Keywords: Landslide Dam Sediment Transport HEC-RAS
Abstract: The landfall of Super Typhoon Sendong in December 2011 triggered flash floods in Negros Oriental, leading to widespread devastation and prompting a detailed investigation into the formation and breach of landslide dams. This study focuses on identifying potential locations for landslide dams in the mountainous region of the Okoy River and assessing how their failure would affect downstream communities. By combining geomorphic analysis, sediment transport simulations, and multi-temporal data, the research aims to map likely landslide dam sites and model their behavior post-breach. Results revealed that while the breaches of these dams increased flood depths due to the temporary water storage effect, the overall extent of flood inundation did not significantly change. The study concluded that the height of a landslide dam is a key factor in determining its potential impact, with taller dams posing a higher risk of severe flooding upon breach.
Year: 2025