Case Study 2- Flood Mitigation- Tokyo Japan Flashcards
What is the primary reason Tokyo is prone to flooding?
Tokyo is located on a floodplain intersected by several rivers, including the Arakawa and Sumida.
What is the G-Cans Project?
The Metropolitan Area Outer Underground Discharge Channel designed to manage flood risks in Tokyo.
What are the estimated costs of the G-Cans Project?
Approximately ¥230 billion (about $2 billion USD) for construction and ongoing maintenance.
What is a significant benefit of the G-Cans Project?
It has significantly reduced flooding in Tokyo by diverting excess water from rivers during heavy rainfall.
What is a drawback of the G-Cans Project?
It requires specialized skills and constant monitoring for effective operation.
What are the costs associated with reinforced river embankments?
- Environmental impact
- Aesthetic and social costs
What are the benefits of reinforced river embankments and flood gates?
- Immediate and reliable protection against river flooding
- Economic benefits by protecting urban real estate
What are some costs of urban planning and zoning in Tokyo?
- Restrictions on development
- Displacement of communities or businesses
What is a key benefit of urban planning and zoning related to flood risk?
It promotes long-term sustainability by integrating flood risk management.
What is the overall evaluation of Tokyo’s flood management approach?
It combines state-of-the-art engineering with comprehensive urban planning.
True or False: The G-Cans Project is inexpensive to maintain.
False
Fill in the blank: The G-Cans Project allows for continued urban development in ________ areas.
flood-prone
What trade-offs do reinforced embankments and flood gates entail?
Environmental trade-offs.
What does Tokyo’s urban planning aim to reduce during severe flood events?
The potential for catastrophic losses.
What model does Tokyo’s floodplain management represent for other megacities?
A model of combining engineering solutions with planning measures.
What is the conclusion regarding the costs and benefits of Tokyo’s floodplain management strategies?
The substantial benefits of flood protection, economic stability, and urban resilience justify the high costs.
