Case Analysis:
The Banqiao Dam Disaster and Hydroelectric Power Safety
Course Name: Earth Science
Grade & Section: STEM 11 - Sherington​
Submitted by: Gladdy Mel M. Fronda
Submitted to: Ma`am Kathleen Anne Faderogao
August 26, 2025
Introduction
The Banqiao Dam in Henan Province, China, failed in 1975 and became
one of the worst disasters in hydroelectric power history. Built in the 1950s to
help with flood control, irrigation, and electricity, the dam collapsed when
Typhoon Nina brought much more rain than it was designed to handle. Its failure
caused 61 other dams to break, flooding wide areas and killing about 171,000
people.
The main issue in this case is the weakness in the dam’s design and
structure when faced with extreme weather. The disaster was made worse by
poor communication and lack of proper emergency response. This tragic event
shows the importance of checking risks carefully, managing dam safety, and
making hydropower projects stronger against climate impacts.
The purpose of this analysis is to look at the causes and effects of the
Banqiao Dam disaster, point out the main mistakes in management and
engineering, and give suggestions to avoid the same kind of tragedy in future
hydroelectric projects.
Statement of the Problem
The main problem in the Banqiao Dam disaster was the failure of the
dam’s design to handle extreme rainfall during Typhoon Nina. The structure
could not withstand the heavy water pressure, which led to its collapse. This
triggered the failure of 61 other dams, causing massive flooding and loss of lives.
Sub-problems include:
➢​ Poor communication and warning systems that delayed evacuation.
➢​ Weak disaster response that could not handle the large-scale emergency.​
Lack of proper risk assessment and safety measures in the dam’s
construction and maintenance.
Analysis of the Case
Causes
➢​ Design limits – The dam was not built to survive extreme rainfall.
➢​ Poor maintenance – Cracks and weaknesses were not fully repaired.
➢​ Weak communication – Warnings did not reach people in time.
➢​ Poor disaster response – Evacuations and relief efforts were slow and
unorganized.
Effects
➢​ Huge loss of lives and property.
➢​ Millions of people displaced.
➢​ Long-term damage to agriculture and the local economy.
➢​ Loss of trust in large hydro projects.
5 Whys Analysis
1.​ Why did the dam collapse?
Answer: Because it could not handle the heavy rain.
2.​ Why couldn’t it handle the rain?
Answer: It was designed for smaller floods.
3.​ Why was it designed that way?
Answer: Planners underestimated extreme weather.
4.​ Why did planners underestimate?
Answer: Lack of proper risk studies.
5.​ Why were risk studies lacking?
Answer: Pressure to build quickly for development.
Stakeholders involved
➢​ Local communities – victims of the flood.
➢​ Government – responsible for dam construction, safety, and response.
➢​ Engineers and planners – designed and maintained the dam.
➢​ Emergency response teams – managed relief and rescue.
Alternatives
Alternative 1: Strengthen Structural Design Standards - upgrade dam
engineering designs to handle extreme weather conditions, using modern
hydrological data and climate projections.
Pros​
​
Increases long-term safety and resilience.​
​
Reduces risk of catastrophic failure.
Cons​
​
High construction and retrofitting costs.​
​
Longer project timelines.​
Alternative
2:
Improve
Early
Warning
and
Communication
SystemsDescription - Establish modern monitoring systems (satellites, sensors,
alarms) and ensure warnings reach communities quickly.
Pros​
​
Saves lives through timely evacuation.​
​
Relatively low cost compared to full reconstruction.​
Cons​
​
Does not directly prevent structural failure.​
​
Requires strong government coordination and public trust.
​
Alternative 3: Develop Comprehensive Disaster Response and Evacuation
PlansDescription- train local authorities and communities in disaster
preparedness, with clear evacuation routes and emergency resources.
Pros​
​
Improves survival rates during disasters.​
​
Builds community resilience and awareness.
Cons​
​
Requires continuous funding, training, and drills.​
​
May be neglected if political or financial priorities shift.
Recommendation
The best solution is to make dams stronger and designed to handle very
heavy rain and extreme weather. The Banqiao Dam failed because it was not
built to hold that much water during Typhoon Nina. By improving how dams are
built and making sure they are safer, we can prevent this kind of disaster from
happening again. Even though it costs a lot of money to do, it is better than
losing many lives and causing damage to communities. This way, dams can last
longer and be ready for stronger storms in the future. Along with this, it is also
important to have good warning systems and emergency plans to help people
stay safe if something goes wrong.
Implementation Plan
To make dams safer, the first step is to check and study all existing dams
to see if they can handle extreme rain. Next, engineers should design and build
stronger parts or add upgrades where needed. Governments need to give funds
and materials for the repairs, and local workers can help with construction. At the
same time, communities near the dams should be taught about safety drills and
early warning systems.
Some risks include lack of money, delays in construction, or people not
following safety rules. These risks can be solved by proper budgeting, strict
monitoring of the projects, and regular training for both workers and communities.
Conclusion
The Banqiao Dam disaster showed how dangerous it can be when dams are not
strong enough to handle extreme weather and when safety systems are not well
managed. This case highlights the need for better design, regular safety checks,
and stronger emergency plans. By improving dam structures and teaching
communities about disaster response, future tragedies can be prevented. If these
actions are followed, hydropower projects can continue to provide energy and
water while keeping people safe.
References
Shapiro, J. (2017). The environmental legacy of socialism: Pollution in Eastern
Europe and China. East-West Center. https://www.jstor.org/stable/26457126
Yi, L., & Wang, Z. (2014). Catastrophic flood and consequences of the Banqiao
Dam
failure
in
China.
Natural
Hazards,
70(1),
337–352.
https://doi.org/10.1007/s11069-013-0819-9
Wu, J., & Zhang, J. (2018). Lessons from the 1975 Banqiao Dam failure, China.
International Journal of Disaster Risk Reduction, 31, 1177–1186.
https://doi.org/10.1016/j.ijdrr.2018.07.024