QUANTUM GIS BASED OPTIMAL EVACUATION ROUTE IDENTIFICATION DURING FLOOD DISASTER

摘要

This paper presents an improved evacuation route method during flood disaster. It first constructs a weighted parameter model by considering road quality and environmental factors. Cost of road quality factor is based on road length, road width and water depth. Cost of environmental factor consists of traversal speed, traffic volume and safe zones. These parameters are given as input to the analytical hierarchy process (AHP) for building the weighted model based on the minimum time consumption with safety. Then using the Dijkstra's algorithm, calculate the most suitable path for safe and speedy evacuation (Dijkstra T.K., 2013). The main objective is to develop a web based spatial GIS application, which provide optimal evacuation route during flood. The Quantum GIS is used with PostgreSQL. It provides a user friendly application which considers the water depth as the main factor for path selection. Safety of the individual is prime concern over time. Results are achieved based on the criteria specified.