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1 February 2019
Brumadinho disaster: the extent of the environmental impact
The human and environmental costs of the Brumadinho disaster in Brazil are becoming increasingly clear, whilst speculation continues as to the causes of the collapse of the tailings dam
18 January 2019
Hidroituango: the complex geology behind the major problems in the mountain
Hidroituango: the complex geology behind the problems in the mountain, with suggestions that the powerhouse cavern might lie at the intersection of 2 faults
21 June 2018
Hidroituango: Renewed movement suggests a landslide of up to 200,000 cubic metres may occur soon
A new evacuation of workers has been ordered at the Hidroituango dam site in Colombia in light of a potential landslide of up to 200,000 cubic metres in the next few days. The integrity of the dam is not considered to be threatened.
18 June 2018
Hidroituango: a substantial step towards reducing the immediate risk
Yesterday the operators of the dam at Hidroituango announced that the crest of the structure has reached 415 m. This is a substantial step towards increasing the safety of the site
11 June 2018
Hidroituango – continued small landslides, and proposals for a way forward
Yesterday a small landslide at the Hidroituango dam site led to the evacuation of some of the workers on the site. Operations continue to manage the situation whilst waiting for the end of the rainy season, and an expected fall in the river level
6 June 2018
Hidroituango: the potential for extremely large landslides?
News reports from Colombia say that an American technical report (possibly by USACE) suggests that landslides of up to 40 million cubic metres are possible at Hidroituango. As the report is not publicly available it is hard to know how to interpret these reports
5 June 2018
Hidroituango – an increase in movement rate
Reports in the last few hours suggest that the landslide at the Hidroituango dam site has accelerated, and has now exceeded the 10 mm per hour warning threshold. Meanwhile, three scenarios for failure of the dam have been described by the international advisors.
4 June 2018
Hidroituango – continued slope movements and low volume seepage from the dam
In the last 24 hours there have been further developments at the Hidroituango dam site in Colombia. Monitoring suggests that movements of the slope continue, whilst concerns are being raised about low volume seepage from the dam
3 June 2018
The Hidroituango crisis: new landslides threaten the site
In Colombia the Hidroituango crisis has deepened as new landslides have started to form close to the dam site, as shown by tension cracks in the slopes and cracks in the tunnels. The level of risk has risen, and 25,000 people are now displaced
28 May 2018
Another landslide at the Ituango dam site in Colombia
On Saturday another landslide happened at the Ituango dam site. This was a smaller failure above a slope that has been cut and mitigated. 1500 workers were evacuated from the site, but no-one was injured. The integrity of the dam was not apparently threatened by this event.
Dave Petley is the Vice-Chancellor of the University of Hull in the United Kingdom. His blog provides commentary and analysis of landslide events occurring worldwide, including the landslides themselves, latest research, and conferences and meetings.
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