NATURAL RISKS After the terrible floods of December 1993 and January 1995, the public establishment Entente Oise-Aisne, which manages the floods, multiplied the construction sites
The water-shaving device at Longueil-Sainte-Marie, in the Oise — Entente Oise-Aisne
- A recent public report by the Court of Auditors points to the lack of preparation of the Ile-de-France region faced with the risk of flooding.
- The departments of Aisne and Oise have tackled the problem of flooding and flooding head-on for many years.
- In 1993 and 1995, the Oise had been confronted, blow after blow, to historic floods.
Increased risk of flooding. While a recent public report from the Court of Auditors points to the Ile-de-France region's lack of preparation in this area, the problem has been addressed. taken at bras-le-corps, for many years, in the departments of Aisne and Oise. In 1993 and 1995, Oise had been confronted, in quick succession, with historic floods. Today, the Etente Oise-Aisne, a public establishment which deals with the management of floods and floods, remains vigilant.
“You can’t compare with Ile-de-France, which has very different problems in the region. cause of urbanization, immediately points out a spokesperson for the Oise-Aisne Entente. But it was necessary to act after the disasters of December 1993 and January 1995 which had caused, in each time, 100,000 victims in around 200 municipalities.”
In this sector, we are far from the violence of the Mediterranean episodes and the Cévennes storms that rage in the south-east of France (at least 45 dead and 8 missing since 2015, according to the Ministry of Ecological Transition). Less dangerous, the Oise is nonetheless a capricious river. And it’s the collective awareness, in 95, that triggered major investment projects.
Two flood control dams were thus built. built in the Aisne. The construction of a third, smaller one is planned for 2023-2024, at Beaugies-Berlancourt, between Compiègne and Saint-Quentin. “The cost of the studies and works of the work to be carried out. Proisy, for example, has been of 8.2 million euros. It is estimated at 70 million euros, the damages which were avoided during the January 2011 flood,” says Marjorie André, director of the Entente Oise-Aisne.
In the department of Oise, another work, called d&crétement of the floods, was designed around Longueil-Sainte-Marie. It is quite simply a question of reproducing the natural expansion zone of the Oise by creating weirs responsible for storing water on agricultural or wooded plots. The water is released later when the risk of flooding has passed.
Preparing for flooding crisis management
“These strategies are implemented by communities to reduce the risk and these arrangements have been implemented. created to protect people and property,” continues Marjorie André. Today, the actions are continuing and focus in particular on raising public awareness and preparing for the crisis. crisis management”
Thus, a new aid device, called Inond’action, allows, after diagnosis, to finance 80 % of the protection work for individuals or small businesses. “About ten people have already engaged work such as raising a boiler or fixing a garden shed to the ground, for example,” the Oise-Aisne Agreement.
Planting of hedges and weirs
In addition, this fight against floods extends to the effects of runoff during major storms. Because after the high heat of summer, the risk is even higher. this winter. “We are taking action with farmers to replant hedges or fascines, kinds of intertwined branches, like at Saint-Pierre-les-Bitry, in the Oise, underlines the Entente. In September, a violent storm affected the municipality. The mayor was delighted with these arrangements which prevented so that the mud does not roll down.”
Fascinated by; Saint-Pierre-les-Bitry – Entente Oise-Aisne
This autumn, the Hauts-de-France region has not yet posted major floods, brought to goes to certain towns on the Côte d’Opale, in Pas-de-Calais or in Abbeville, in the Somme. But the critical period is often between November and March.
“If the flood of February 1995 happened again today, the flooding would be much less for the bé ;beneficiaries of the regulatory works which concern the departments of Oise, Aisne and Val-d’Oise, assures Marjorie André. Water levels would be lowered and damage to homes and businesses would be reduced as a result.”