Because of geographical condition such as precipitous terrains and steep
rivers, meteorological conditions such as typhoons and torrential rains,
and social condition, Japan is subject to frequent natural disasters
such as flood and landslide. As a result, there is a great loss of
people's lives and property due to natural disasters. In reality, there
has been severe damage caused by various disaster in the past, including
1947 Typhoon Kathleen, 1959 Typhoon Vera also known Isewan Typhoon, and
2018 torrential rain. Especially, Landslides and flooding caused more
than 200 deaths by torrential rain in 2018. This study introduces
disaster management about middle size city in Japan. In non-structural
disaster measures, one of the most important disaster management
measures is hazard map. It shows not only flood and land slide hazard
area but also evacuation shelter information and it can help the people
to evacuate the flood and land slide disaster. In addition, information
on evacuation methods, past disasters, and information collection way is
also shown. And also, estimate the number of evacuees is very important,
too. For the analysis, the population, the information of building land
slide information and the simulation result of estimating the flood
inundation area, depth, continued flooding times, overflow, bank erosion
are required. Not only horizontal evacuation but also vertical
evacuation is important. As a result of the estimate the number of
evacuees, vacancy rate of shelters are calculated. It can help the flood
evacuation plan.