Yan flash floods caused by debris flow after heavy rainfall, says expert
ALOR SETAR, Aug 20 — The incident in the Gunung Jerai area that resulted in mudslides and floods on Wednesday was not caused by the water surge phenomenon but is attributed to a debris flow incident which is a common occurrence in mountainous areas.
“Meanwhile a debris flow formed when water is mixed with soil and forests debris that move rapidly downwards entering the riverbeds until it reaches the foothill,” he told Bernama today. Ibrahim said the incident would take a long time to recur as the area has been cleared of debris such as fallen trees that would result in an uninterrupted flow of rainwater.
He said water surges due to rainfall would bring with it wood debris, stones and silts which would cause mud floods up to 1.5 metres deep at the foothills.
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