Risk of flooding damage in major cities
Rising flood damage
The Japan Meteorological Agency has predicted that compared to the present, over the next 100 years, the number of days annually in which daily precipitation exceeds 200 mm will increase in nearly all regions, and will increase by 1.1 to 1.3 times in areas with the greatest daily precipitation. Furthermore, we must consider the fact that climate change impacts in the future will bring about floods that exceed speculations to date.
Topographically, Japan's land is already at high risk for flooding. Many cities are located in areas susceptible to the effects of floods, and it is said that about one half of the total population is concentrated on land lower than the water level of rivers during floods.
In order to minimize the damage of floods, we must routinely be aware of the risk of flooding and put in place preventative measures as much as possible. In addition, we need to prepare in advance for the occurrence of floods, including the securement of evacuation sites and familiarization with evacuation methods, as well as for timely evacuation guidance and support for living following evacuation.
What ICT can do for flooding countermeasures
The Ministry of Land, Infrastructure, Transport and Tourism provides the national Flood Prediction Area Map and the Flood Hazard Map. These are computer simulations based on geographical information that are utilized by local governments to consider disaster prevention measures. Based on this information, as well as weather forecasts and observation data from sensors on ever-changing precipitation and water content ratio in various regions, simulations that predict future rainfall and when and to what extent floods, water exposure, and even landslides, will occur can be useful for evacuation of residents and flood countermeasures at key facilities.
In addition, ICT such as infrared sensors that are able to distinguish objects even at night can be utilized in the prompt search and rescue of disaster victims following the occurrence of floods and landslides.
What NEC can contribute to addressing flooding damage
Disaster risk assessments prior to the occurrence of natural disasters (earthquakes and wind and flood damage)
In order to minimize the damage of natural disasters such as floods, it is important to recognize the risk of disasters and enact measures in advance. NEC carries out minute analysis of the individual status of customer facilities to support disaster reduction measures that prioritize realistic solutions based on disaster scenarios.
- Prevention of disaster-related damage based on proactive measures
- Prompt responses following occurrence of disasters
Sensing and predicting the occurrence of disasters
Initiatives to anticipate and predict the occurrence of floods and landslides are also being advanced. Based on sensors installed in locations with high risk for disaster occurrence, weather data (e.g. cumulative precipitation, precipitation forecasts), and geographical and geological data, NEC supports the prediction of disasters based on simulations and helps provide evacuation guidance for nearby residents prior to disaster occurrence.
- Prompt measures and evacuation prior to disaster occurrence
Support for disaster relief activities in the aftermath of disasters
Disaster relief activities are a battle against time. Using small unmanned aircraft and multi-rotor helicopters, NEC supports rapid information collection and search for victims, confirmation of safety, and information sharing with disaster headquarters by confirming on-site conditions in the aftermath of disasters and carrying out searches in narrow places where light does not reach with infrared cameras.
- Rapid discovery and rescue of victims