CONTROLLING EFFORT OF LAHAR FLOW IN SINABUNG VOLCANO

Abstract

The Sinabung Volcano that has been inactive for 400 years suddenly erupted on 29 August 2010. This activity kept going until November 2010. After being idle for a while, Sinabung was back to be active on 15 September 2013. The fluctuating activity was going on until November 2016. Recorded that from 2013 until 2016, there have been almost a thousand eruptions. For the Sinabung activity, people living around the dangerous area, such as West, South, Southeast, and East slopes, had been evacuated. The controlling effort of lahar flow by government of Karo Regency is still non-structural. One of them to forming observer volunteer team of river height, and installing ARR+ equipment with Balai Litbang Sabo Yogyakarta to support the lahar flow early warning systems based society. On the other hand, local goverment collaborates with BWS Sumatera II to implement the structural lahar flow control. In 2017, few sabodams are going to be built in Lau Bekerah 1 River, Perita, and Perbaji, as an effort to protect the settlement and agricultural land on West slope. Besides, to mitigate, adapt the threat of lahar flow, and to prevent casualties and loss, it has been proposed some recomendation.