Identifying road network vulnerability during disaster, a case study of road network evacuation in Mount Merapi eruption

摘要

The eruption of Mount Merapi in 2010 killed more than 400 people. An optimal evacuation is strongly affected by roadnetwork preparedness used as an evacuation route. This study aims at developing an evacuation model from the disaster toidentify road network vulnerability in optimizing evacuation route performance. The evacuation modeling employed a useroptimalmethod to analyze changes in road network performance in the form of flow as a basis for developing a formula tomeasure road network vulnerability. The results indicated increased flows on the road network areas of ring 1, ring 2, ring 3, andSleman outside the ring. By employing the developed vulnerability equation, the road networks identified vulnerability of ring 1,ring 2, ring 3, and Sleman outside the ring indicated by positive index values. Meanwhile, the road networks in Yogyakarta City,Bantul, Kulon Progo, and Gunung Kidul were identified as invulnerable indicated by the negative index values.