Kyoto - BOSAI: Science that Can Save Your Life

Key Concepts

Kyoto's Vulnerability: Ancient capital of Japan, rich in cultural heritage, but susceptible to earthquakes and landslides due to its geographical location.
Earthquake Preparedness: Focus on protecting wooden structures from post-earthquake fires caused by ruptured gas lines and damaged electrical systems.
Advanced Fire Prevention System: Installation of a state-of-the-art system in 2018, featuring powerful pumps, water cannons, and fire hydrants.
Heat Shield System: Developed to combat radiant heat from fires, using pipes along roadsides to spray water directly onto roofs.
Potassium-Based Fire Suppressant: Use of a sheet containing potassium as the main component for fire extinguishing.
Lightning Protection: Measures to prevent electrical fires caused by lightning strikes, including placing special sheets in electrical boxes and circuit breaker panels.
Landslide Prevention: Monitoring of rainfall and groundwater levels to predict and alert for potential landslides, especially in areas with steep slopes.
Disaster Response Planning: Protocols for rescuing cultural artifacts, including detailed records of their location and the number of people required for their safe removal.
Community Involvement: Role of resident protection teams in regular patrols to safeguard lives and cultural heritage.

Kyoto: Protecting Heritage from Disasters

Kyoto, the ancient capital of Japan, is renowned for its stunning historical sites and is a top global tourist destination. However, its geographical location, nestled in a basin surrounded by mountains, makes it vulnerable to natural disasters, particularly earthquakes and landslides. The city's rich cultural heritage, largely composed of wooden structures that have stood for centuries, presents a unique challenge in disaster mitigation.

Earthquake Preparedness and Fire Prevention

A major concern for Kyoto is the risk of earthquakes. A magnitude 7.5 earthquake could rupture gas lines and damage electrical systems, leading to widespread post-earthquake fires. To address this, a large-scale, state-of-the-art fire prevention system was installed in 2018.

Powerful Pumping System: Four pump stations have been established around temple grounds, capable of delivering a total of 3,000 tons of water. This system is designed to provide a powerful and continuous water supply.
Water Cannons: 31 water cannons are strategically installed to cover the entire grounds, capable of spraying water from roofs to prevent fires from spreading between buildings, even when structures are spaced apart.
Fire Hydrants: 11 fire hydrants are also set up to facilitate quick response to smaller fires.
Heat Shield System: To combat radiant heat, which can reach up to 700 degrees Celsius, a shield system has been developed. Pipes installed along roadsides spray water directly onto roofs, preventing fires from spreading. The rationale behind these advanced systems is to protect the historical landscape and cultural value of the city, which would be compromised by traditional concrete barriers.

Fire Suppression Technology

Beyond water-based systems, innovative fire suppression methods are also employed.

Potassium-Based Fire Suppressant: At some locations, sheets containing potassium as the main component are used. These thin and light sheets are effective in extinguishing fires.
Lightning Protection: To prevent electrical fires caused by lightning strikes, special sheets are placed inside outdoor boxes and circuit breaker panels. These are designed to quickly neutralize surges of high voltage that could ignite wiring or electrical devices.

Landslide Mitigation

Kyoto's mountainous surroundings also make it susceptible to landslides, especially in recent years with the occurrence of "guerrilla downpours" that exceed historical rainfall patterns.

Rainfall Monitoring System: A system collects rainfall data in real-time. Sensors within a funnel measure the amount of rain that has fallen. If rainfall exceeds a certain threshold or continues for an extended period, the system runs a calculation and triggers an alert. A blue graph visualizes the rainfall over time, with yellow, orange, and red lines indicating increasing levels of concern.
Groundwater Monitoring: Sensors are also placed to measure fluctuations in groundwater levels. When it rains, water seeps into the ground and can build up above a hard layer of bedrock. If rainfall is heavy and prolonged, this underground water buildup can cause ground levels to rise, creating gaps between soil layers. This can lead to the upper soil layer slipping down the slope, triggering a landslide.
Future Goals: The current focus is on developing alerts that incorporate actual ground conditions and establishing clear criteria for these alerts.

Disaster Response and Cultural Preservation

In the event of a disaster, the preservation of cultural heritage is a critical aspect of the response.

Artifact Rescue Protocols: Detailed records are maintained, specifying the location of each Buddha statue within the temple grounds and the number of people required for its safe removal. In extreme situations, where only one person is available, protocols exist for carefully removing the head of the statue. This allows for an estimation of the statue's original size based on the head's dimensions, aiding in its subsequent restoration.
Community Protection Teams: Resident protection teams, largely composed of volunteers, conduct regular night patrols. Their role extends beyond safeguarding lives to actively protecting cultural heritage.

Conclusion

Kyoto's approach to disaster mitigation is a comprehensive strategy that integrates advanced technological solutions with meticulous planning and community involvement. By focusing on preventing fires, mitigating landslide risks, and establishing clear protocols for cultural artifact rescue, the city aims to safeguard its invaluable heritage for future generations, demonstrating that disaster preparedness is not just about saving lives but also about preserving history and culture.