Kelud, Lahar Dinginnya Miliki Deposit 50 Juta Meter Kubik
Kelud Eruption, Cold Lava Waiting to Stream Down
Reporter : Roni Said
Editor : Cahyani Harzi
Translator : Dhelia Gani
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Jakarta (B2B) - Hujan di lereng Gunung Kelud menyebabkan banjir lahar hujan yang membawa material vulkanik pasca erupsi menuju daerah Kabupaten Kediri dan Malang dengan potensi deposit material 50 juta meter kubik.
Pada pukul 16.30 WIB (18/2/2014), banjir lahar hujan di Sungai Konto di Kecamatan Kandangan dan Sungai Serinjing di Kecamatan Puncu, Kepung, dan Pare Kabupaten Malang.
"Lahar dingin membawa material pasir, batu, dan kayu. 5 rumah dan 1 mushola terendam banjir lahar dingin. Tidak ada korban dari banjir lahar," ujar Kepala Pusat Data Informasi dan Humas BNPB Sutopo Purwo Nugroho dalam siaran pers, Selasa malam (18/2).
Di Kab Malang, banjir lahar dingin terjadi di Sungai Sono dan Sungai Sambong. Akibatnya 1 jembatan kecil putus yang menghubungkan antara Dusun Pait, Kutut, Klangon, Munjung, Sedawon dengan Desa Pandansari. 2 rumah hanyut, hingga laporan ini ditulis belum ada laporan korban jiwa.
Menurut Sutopo, kondisi material lahar hujan telah jenuh air karena sudah 3 hari terkena hujan sehingga mudah untuk meluncur ke daerah lebih rendah. Tentu saja 50 juta meter kubik tersebut tidak akan terjadi sekaligus, melainkan tergantung dari hujan yang ada.
Diketahui banjir lahar hujan memiliki sifat merusak. Banjir lahar juga memicu tingginya erosi di bantaran sungai yang dilalui banjir lahar. Tidak aneh seringkali pondasi jembatan pun roboh. Pada kemiringan lereng curam, mengalirnya banjir lahar ke arah dataran kaki gunung berlangsung sangat cepat.
"Daya kikis atau daya tumbuk arus banjir lahar terhadap tepi sungai akan semakin kuat," ujar Sutopo.
Di sekitar Kelud telah dibangun sabo sabo dam yang mampu menampung 14,5 juta meter kubik. Sungai-sungai yang ada menampung 14 juta meter kubik, sehingga dam sabo dan sungai mampu menampung 28 juta meter kubik. Masyarakat dihimbau selalu waspada. Jauhi bantaran sungai saat banjir lahar dingin.
Jakarta (B2B) - After the eruption of Kelud, Scientists estimated that there is about 50 million cubic meters of lava that spurred out of Kelud Mountain.
“There is about 50 million cubic meters of cold lava that is around the slopes of Kelud Mountain, especially now because of the recent weather which makes it easy for a flood of cold lava,” said Head of Data Information and Public Relations BNPB, Sutopo Purwo Nugroho, in a brief message at Jakarta, Tuesday (18/2) night.
Sutopo explains the downpour that washed the Gunung Kelud Area since 3:00 PM, has caused the cold lavahas led to a flood of cold lava in the rivers of the district of Kediri and Malang Regency.
It has come to light that the cold lava has carried an amount of sand, rocks and woods.
“Of course all the cold lava wouldn’t spur out all at once. It still depends on the weather.”
BNPB has recorded that at least there are five houses and one mushola that’s currently sunken in Cold Lava. Nevertheless everyone survived from the flood of cold lava.
Meanwhile at the Malang Regency, the cold lava flood happened in the Sono River and the Sambong River, which then resulted to the snapping of a small bridge that connects the local hamlets with the village of Pandansari.
From the events, it is recoded that two houses eroded along with the lava, however it is unknown whether there is any loss of life from the flood.
Actions to anticipate the cold lava flood which would later get a lot more messy, BNPB has prepared a dam which could fill up 14,5 million meter cubic of liquid. Adding up with the rivers, which could withhold 14 million meter cubic, both structures could fill up an astonishing 28 million meter cubic.
“The people are encouraged to always be prepared and alert. Also to stay away from the riverbanks if these recent events repeated itself.”
