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The reason is the weather conditions.
Ramojus Kraujelis, Head of the Kernavė State Cultural Reserve Directorate, claims that he monitors the situation on the slope on a daily basis. “We are seeing if there is no more movement,” he says. “The slope seems to have stopped since the weekend, there have been no more landslides.”
When asked why the slopes of one mound moved and the other cracked, the head of the reserve assured that the reason was natural conditions. “
“These cracks show once again that they arose from natural conditions. For example, when we have a deep winter with a lot of snow. It is bad that there was a lot of snow, but there was no frost and the water did not run off the mounds,” says the interlocutor. , adding that today we are talking about the detachment of the turf surface from the mound, not deep processes.
Checking for solutions
“It just came to our notice then. The Commission has identified the areas of irregularities, we are consulting with experts, we are looking for solutions. We really want to organize the main site of the entire Kernavė mound complex. The slopes are inclined in the most visible place. We will do everything in our power, “said the coach.
The reserve has already sent information to the Ministry of Culture and the Department of Cultural Heritage, in addition to consultations with geologists, specialists who handled the landslide on the Gediminas hill and archaeologists.
“I would like more that it was not a response to an emergency situation, when it is already slipping, but that complex management measures are carried out. That we have all the necessary geological engineering research on the structure of its mounds and suggestions on how to approve these slopes, which places are the most problematic, ”said the reserve’s owner.
It’s comforting that everything is stable
“It just came to our attention then. Hopefully we have time because the processes have stalled. We want to reassure the public. The mound is stable, those movements are an inevitable natural process. After a period of winters or deeper rains, this happens” says R. Kraujelis.
According to him, the slopes of the mounds are a creation of nature and man, they are steep, not like the usual slopes in nature, so they need constant maintenance.
“We can also remember the Middle Ages, when the slopes of the mounds were built, poured, rebuilt after the attacks. The largest slope of the Mindaugas throne mound on the east slope was in 1979. In the old photos it can be seen that almost a third of the mountain was sloping. The north, northwest and southeast slopes were managed decades ago. The evening, which is now moving, was not handled comprehensively. Each slope has its turn, ”he said.
The situation in Nesting Hill does not get worse
Slope cracks were also noted on another mound, Lizdeika Hill, but so far no landslides. “We are monitoring the situation,” said the manager.
The slope of Lizdeika Hill was maintained last year. The site that was maintained, according to the reserve manager, appears stable, with visible cracks near where the maintenance work was not done. “We probably would have had two more serious landslides had they not been addressed last year. Lizdeika Hill is much more stable than the slopes of the Mindaugas Throne,” he says.
Wants to guess before State Day
R. Kraujelis says that if the best-case scenario occurs, the landslide stops and the necessary funding exists, the reserve would like to be ready to receive visitors during one of the most important holidays: the coronation day of King Mindaugas of Lithuania.
“Mindaugas would symbolically wish the Mindaugas throne mound to be fixed at least by temporary means. To have at least an aesthetic image for the celebration and in the future then we will solve these complex problems ”, he says.
Consider the possibilities of strengthening the tracks: “We need to find herbal blends that are more suitable for the tracks. We spoke with naturalists about what those mixtures might be. These minimally invasive techniques would also help stabilize the slopes. “
The cost of restoring the condition of the mounds will depend on the analysis and technical solutions proposed and chosen by the experts, and technical solutions. But the owner of the reservation says that it is not hundreds or thousands of euros.
There were warning signs
Jonas Satkūnas, the senior adviser to the Lithuanian Geological Survey, says that the landslides are not considered large, only the plant layer has been displaced.
“It just came to our knowledge then. Of course, this is already a violation, a certain injury, especially for such an important cultural heritage object as the Kernavė mounds and especially the Mindaugas throne mound, but it is not such an injury. mortal that would damage the integrity or integrity of the mounds. ”, He comments.
“Natural conditions have led to such a phenomenon. We saw how much snow melted with sudden heat in a very short time. There was no freezing. Practically all that snow was absorbed on the slopes, it did not drip”, explained the reason the person in charge of the service. Tutor. .
According to him, the Lithuanian Geological Survey has been monitoring the events on the slopes of Kernavė since 1999: “There were deformations on the slopes. They were ditches in the Lizdeika Mound and on the slope, separating the Lizdeika Mound from the edge of the upper terrace of the Neris Valley. We were still in 2012. landslide on the Mindaugas throne mound and in 2013 a landslide on the north slope of Lizdeika hill. Such deformations are constant. “
J. Satkūnas says that exactly one year ago, that is, in March of last year, the service, in a written response to the reserve, prepared a letter with recommendations for slope stability assessments.
“These are geotechnical engineering studies that evaluate the stability of slopes and design the appropriate measures to guarantee stability. This was not done and the tracks were deformed. The tracks need constant maintenance and reinforcement. Perhaps there is no need for capital measures like Gediminas Hill, but preventive actions must be constant, ”he said.
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