Pemetaan Shelter dan Jalur Evakuasi Tsunami Studi Kasus: Kabupaten Bantul.

Abstract

Terdapat potensi tsunami setinggi 20 meter yang dapat terjadi di sepanjang pesisir selatan Pulau Jawa. Bantul merupakan salah satu daerah yang rentan akan bencana tsunami tersebut sehingga diperlukan upaya mitigasi dalam bentuk dan pembuatan jalur evakuasi serta lokasi yang tepat dijadikan tempat evakuasi (shelter). Metode yang digunakan dengan bantuan aplikasi Sistem Informasi Geografis antara lain pemodelan inundasi tsunami, weighted overlay, dan network analysist dengan bantuan tools InaSafe. Hasil pemodelan inundasi tsunami menunjukkan tsunami ketinggian 10 meter menggenangi area seluas 9,72 km2, ketinggian 15 meter menggenangi area seluas 15,69 km2, dan ketinggian 20 meter menggenangi area seluas 21,29 km2. Kecamatan Kretek, Sanden, dan Srandakan terdampak oleh hasil pemodelan tsunami tesebut.. Terdapat 8940 penduduk terdampak tsunami run up 10 meter, 15060 penduduk untuk run up tsunami 15 meter, dan 23870 penduduk untuk run up tsunami 20 meter sebesar 23870 penduduk. Hasil pemodelan menunjukkan 41 rute evakuasi tsunami dengan 16 jalur yang dikategorikan sangat jauh, 3 jalur dikategorikan jauh, 14 jalur yang dikategorikan sedang, dan 5 jalur yang dikategorikan dekat, dan 3 jalur yang dikategorikan sangat dekat.

There is a potential for a tsunami as high as 20 meters that could occur along the southern coast of Java Island. Bantul is one of the areas that is vulnerable to the tsunami disaster, so mitigation efforts are needed in the form and creation of evacuation routes and appropriate locations for evacuation (shelter). The methods used with the help of the Geographic Information System application include tsunami inundation modeling, weighted overlay, and network analysis with the help of InaSafe tools. The results of the tsunami inundation model show that a tsunami with a height of 10 meters inundated an area of 9.72 km2, a height of 15 meters inundated an area of 15.69 km2, and a height of 20 meters inundated an area of 21.29 km2. Kretek, Sanden and Srandakan sub-districts were affected by the results of the tsunami modeling. There were 8940 people affected by the 10-meter tsunami run-up, 15060 people for the 15-meter tsunami run-up, and 23870 people for the 20-meter tsunami run-up of 23870 people. The modeling results show 41 tsunami evacuation routes with 16 lanes categorized as very far, 3 routes categorized as far, 14 routes categorized as medium, 5 routes categorized as close, and 3 routes categorized as very close.