Year: 2018
Type: article
Abstract: A remote monitoring method of rain triggered lahar has been developed and applied to study lahar event on Feb. 17, 2016, at Mount Merapi. Lahar is a wet mass of volcanic fragments flowing rapidly downhill. The system was developed by modifying the Manning formula of kinematic wave model, combined with empirical equations for lahar properties estimation. The rainfall intensity estimated from X-MP radar at Mt. Merapi was also applied to give better spatial rainfall information. The modified model gave lower mean velocity and peak discharge compared to the original kinematic wave model results. These results implicitly indicated that the flow carried more sediment while managed to simulate the stoppage mechanisms in the downstream area. The modified model overestimated the water depth during higher rainfall rate but showed a similar trend with the real observed data. Thus, this method can be an alternative for lahar flow estimation in Mt. Merapi.
Language: English
Subfield: Management, Monitoring, Policy and Law
Field: Environmental Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2932585571