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Monday, November 29, 2021

Lekkas: 30 million tons of water fell yesterday in Kifissos - We need new structures for the climate crisis

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"In Attica, in the Kifissos basin that starts from Kryoneri to Acharnes and includes the largest part of the basin, 30 million tons of water fell yesterday", said today the professor of Natural Disaster Management Efthymios Lekkas referring to bad weather Ballos affecting the country.
We must forget what we knew until today, he even noted speaking to SKY and continued: "The phenomena are unprecedented, we are consumed with who is to blame and who is not, and that is where the dynamics are exhausted us. We are in a new phase, in a phase of climate crisis, new structures are needed ".

"There is a climate crisis, not climate change. There will be more frequent such phenomena, wider in the Mediterranean area, the umbilical cord of the climate on our planet is a very sensitive area, we will have more frequent and larger phenomena in areas that are not expected to have them, and we will have complex crises and risks, ie one it will follow the other or they will manifest at the same time ", the professor explained.

"With this logic we have to plan: multiple risks - multiple crises. "We will face a situation we do not even imagine," he warned.

Ithaca has already suffered significant damage from Ianos, some projects managed to be done some are not, it is difficult to do, because we have continuous landslides, and not only in Ithaca, in many small municipalities, commented Efthymios Lekkas.

Just post catastrophic fires in the Attica team of 46 scientists from the University of Athens and Harokopio under teachers Efthymios Lekka, Nikolaos Bulgarian and Stelios Λοΐζο warned by their study that the burned soils will worsen efforts coping of the climate crisis for this Attention must be paid to the infrastructure of the fire-affected areas, as rainfall can lead to the transport of large quantities of carried materials.

As noted, the August fires were among the most devastating in decades, causing significant damage to multiple forest ecosystems. The next day, especially in October and November will be even more dangerous as the fires affected hydro-geomorphological procedures in burned areas. An increase in erosion and transport rates of sediments should be expected, which in turn will lead to an increase in the frequency of floods, material transport and landslides, for a period that can not be clearly estimated, but ranges from 2 to 15 years

Recently Mr. Anastasios Stamou, professor and director of the Applied Hydraulics Laboratory of NTUA in article in Kathimerini prioritized the four phases of the required actions.  

"According to international experience and literature, in order to deal with the risk of flooding - mudslides, we carry out a series of actions, measures and actions in four phases, with a dual goal: first, to reduce the likelihood of floods - mudslides, such as .χ. with projects for the retention of the carried materials upstream of technical crossing works, and secondly, the reduction of the effects of the flood - mudflow, such as e.g. with the installation of flood monitoring networks and early warning systems (FLS) ”. The professor of NTUA notes in his article that the actions of the third phase include the drafting of a Plan for Emergency and Immediate / Short-term Management of the Consequences of the Flood - Mudslide (corresponding to "Dardaneros") education of the inhabitants, the clearing of the torrents from the burnt materials and trees and the construction of small projects for holding materials. ”

"In the fourth phase, according to Professor Stamos," we carry out long-term flood response measures - mudflow, which mainly include the design and construction of green flood protection projects and the installation of SEP. For example, catchment areas and terraces to contain runoff and sediments, aquifer enrichment projects with rainwater, etc. "The above actions must start immediately and the first of them must have been implemented to a significant degree before November, which is the month with the most catastrophic floods in Attica, while it is very important to inform / educate all stakeholders, especially residents of the affected areas, whose active participation in tackling the risk of flooding - mudslides is extremely important. "

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