Tìm quy luật để ứng phó thiên tai bất thường: Bài toán dữ liệu và dự báo | VTV24

Key Concepts

• Biến đổi khí hậu (Climate Change): The primary driver of increasingly extreme weather events.
• Thiên tai cực đoan (Extreme Weather Events): Unusually intense and unpredictable natural disasters like heavy rainfall, floods, storms, and landslides.
• Ứng phó đa thiên tai (Multi-Hazard Response): Shifting from responding to single disasters to preparing for and managing multiple simultaneous threats.
• Quản trị thiên tai cộng đồng (Community-Based Disaster Management): Integrating local knowledge, data collection, and community participation into disaster preparedness and response.
• Dự báo sớm và cảnh báo sớm (Early Forecasting and Warning): Utilizing data and technology to predict and alert populations to impending disasters.
• Thích ứng với biến đổi khí hậu (Climate Change Adaptation): Adjusting to actual or expected future climate effects.

Main Topics and Key Points

1. The Devastating Impact of 2025 Natural Disasters:

The video opens by highlighting the severe consequences of natural disasters in 2025, reporting over 460 fatalities and over 100,000 billion VND in damages. The scale of these events is unprecedented in recent memory, with residents expressing shock and a sense of helplessness. The disasters included exceptionally heavy rainfall, rapid and powerful floods, and frequent storms. Areas historically known for dry weather also experienced significant flooding. Unusual thunderstorms and tornadoes caused shipwrecks and building collapses, leading to immense loss and grief. Specifically, from October to early December, widespread flooding and landslides occurred, with some communities experiencing four flood events within a single month.

2. Record-Breaking Rainfall and Flood Levels:

The rainfall in 2025 broke historical records across both Northern and Central Vietnam. The Ba River basin received over 1000mm of rain, resulting in a total flood volume of approximately 4 billion m³ between November 16th and 22nd – nearly half the capacity of the Hoa Binh Hydropower Reservoir. The video emphasizes the unprecedented nature of these rainfall amounts and flood levels.

3. The Role of Climate Change:

The video explicitly links the increased frequency and intensity of these disasters to climate change. Rising sea and land temperatures lead to increased evaporation and atmospheric humidity, altering global atmospheric circulation patterns. This results in more extreme weather phenomena. A quote from an expert states: “Khi mà nhiệt độ trái trái đất nóng lên thì sẽ làm gia tăng các hiện tượng như là cường độ về bão, mưa lớn và thay đổi các cái hoàn lưu lớn gây tác động lên cái sự gia tăng về về thiên tại.” (When the Earth's temperature rises, it will increase phenomena such as the intensity of storms, heavy rain, and changes in large circulations, affecting the increase in disasters.) The video also cites broader regional impacts, noting that Southeast and South Asia have experienced at least $20 billion USD in damages and approximately 2000 deaths/missing persons due to similar events.

4. The Impact on Local Communities – Hanoi and Hoi An Case Studies:

The video provides specific examples of the impact on communities. In Hanoi, residents of Triều Khúc Street experienced frequent flooding, with one resident, Mr. Dũng, marking the highest water level in his home in October. Families express constant anxiety during the rainy season. In Hoi An, residents have traditionally recorded flood levels on wooden posts, passing down this knowledge through generations. These records are now being used to inform evacuation plans. A resident, referencing the 1964 flood, explains how historical data guides their decisions: “Thì nghe dự báo lên cao như năm 64 thì năm 64 là nó rất là cao cho nên là mình không có thể ở đây được. Cho nên là phải đi tới chỗ cao hơn.” (Hearing the forecast rise like in '64, '64 was very high, so we can't stay here. So we have to go to higher ground.)

5. Shifting Approaches to Disaster Management:

The video argues for a shift in disaster management strategies. The traditional approach of responding to individual disasters is no longer sufficient. Instead, a multi-hazard response is needed, focusing on proactive adaptation and risk management. The development of a national flood map is highlighted as a key initiative, aiming to provide real-time information on flood levels and potential evacuation needs. The quote emphasizes this change: “Từ ứng phó với đơn thiên tai thì nay phải ứng phó với đa thiên tai, từ chống đỡ sang chủ động thích ứng và quản lý rủi ro.” (From responding to single disasters, we must now respond to multi-hazards, from resisting to proactively adapting and managing risks.)

6. Leveraging Technology and Community Knowledge:

The video showcases how technology is being integrated with traditional knowledge. Hue is implementing a smart city monitoring system that collects data on landslides, flooding, and rainfall. Sensors provide real-time information, allowing residents to prepare for impending disasters. A café owner in Hue uses surveillance cameras to monitor flood levels and alert family members. However, data coverage remains limited, currently reaching less than 10% of the population. Challenges also exist in data standardization, as flood level measurements vary depending on the reference point (e.g., street level vs. house foundation).

Step-by-Step Processes/Methodologies

• Community-Based Data Collection: Residents recording flood levels on posts, providing historical data for future planning.
• Smart City Monitoring System (Hue): Data collection via sensors, real-time updates, and dissemination of information to residents.
• Flood Map Development: Creating a national map to visualize flood levels and inform evacuation decisions.
• Multi-Hazard Risk Assessment: Moving beyond single-disaster planning to assess and prepare for multiple simultaneous threats.

Data, Research Findings, and Statistics

• Fatalities: Over 460 deaths.
• Economic Damages: Over 100,000 billion VND (approximately $4 billion USD). Regional damages estimated at $20 billion USD.
• Rainfall on Ba River Basin: Over 1000mm.
• Flood Volume (Ba River Basin): Approximately 4 billion m³ between November 16th-22nd.
• Data Coverage (Hue): Smart city monitoring system covers less than 10% of the population.
• Flood Level Discrepancies (Hoi An): Measurements vary depending on the reference point, hindering standardized comparisons.

Logical Connections

The video establishes a clear causal link between climate change and the increasing frequency and intensity of natural disasters. It then demonstrates how these disasters are impacting specific communities, highlighting the need for a shift in disaster management strategies. The integration of technology and traditional knowledge is presented as a promising approach to improving preparedness and response. The examples of Hanoi and Hoi An illustrate the practical application of these strategies.

Synthesis/Conclusion

The year 2025 served as a stark reminder of the devastating consequences of climate change and the urgent need for proactive disaster management. The video emphasizes that traditional approaches are no longer sufficient and that a shift towards multi-hazard response, adaptation, and risk management is crucial. Integrating community knowledge with technological advancements, such as smart city monitoring systems and flood mapping, offers a path towards building more resilient communities. While challenges remain in data coverage and standardization, the lessons learned from 2025 provide a foundation for a more prepared and adaptive future. The concluding sentiment is that while natural disasters may be unavoidable, they do not necessarily have to become catastrophic. The final statement encapsulates this: “mùa mưa lũ năm nay dữ liệu đã giúp cứu sống rất nhiều mạng sống ở những nơi quản trị dữ liệu tốt thiên tai không còn trở thành nỗi ám ảnh họ chung sống với thiên tai coi thiên tai là một dấu ấn khó quên của vùng đất B đ” (This rainy season, data has saved many lives in places with good data management; disasters are no longer a source of fear, they coexist with disasters, considering disasters as an unforgettable mark of the B đ land).