PREDIKSI LOKASI RAWAN PEMBENDUNGAN ALAMI PADA DAERAH ALIRAN SUNGAI SEBAGAI MITIGASI BENCANA BANJIR BANDANG (DAS KRUENG TEUNGKU-KECAMATAN SEULIMUM-ACEH BESAR-PROVINSI ACEH)
Abstract: Flash floods have repeatedly
occurred in Aceh province and happened at Seulimum Aceh Besar district on
January 2, 2013. The flash floods flows to Krueng Raya and crashing Beureuneut
village. Flash floods caused 90 % of the 90 houses in the village were
submerged with a height varying between 1-3 meters. It is the repeat disaster.
In 1980 a similar disaster has also resulted in a loss of community life. But
until now there hasn’t been the availability of early warning systems
particularly describing the the upstream of sub-watershed Krueng Tengku.
Therefore this study aimed to evaluate volume of the natural damming. The
results obtained is based on surface geological conditions in the upstream and
downstream of the sub-watershed map of Krueng Tengku (SIMDAS KEMENHUT, 2012)
and clarified through the maps of Google Earth Pro, field surveys, reflecting
there are 2 (two) the natural dammings potential flooding flash if the collapse
of a natural dam. Based on the soilcondition, land slope, land cover, then the
condition that there is potential for containment dam collapse. Extensive
analysis of the volume and surface damming through maps withdifference
elevation of 1 meters+202 m to +210 m MSL. The maximum volume of natural
damming 29.175.347,31 m3 and area of 3.160.747,69 m2(location I). Extensive
analysis of the volume and surface damming through maps withdifference
elevation of 2 meters+114 m to +122 m MSL. The maximum volume of natural
damming 909,841.19 m3 and area of 282,048.36 m2(location II). Extensive damming
of providing a very high hazard potential in the event of a dam collapse
Penulis: Dirwan, Azmeri, Amir
Fauzi
Kode Jurnal: jptsipildd130629
