One of the causes of flooding in major cities is soil sealing with concrete and asphalt preventing the earth absorbs some of the water and prevent it from accumulating in the lower places.
"Flooring solutions developed in the project can help mitigate urban flooding caused by large volumes of water in the network of rainwater," said Erika Holt, of the Center for Technological Research of Finland.
The permeable paving consists of a bearing surface layer, applied over layers of high porosity material, capable of retaining water. crouch The layers of subsurface can receive drainage crouch systems or collecting water, or to interconnect with the rainwater network.
According to Holt, the permeable paving is designed to meet the rigors of the Nordic winter, resisting freezing in the cold seasons and the application of salt to remove ice, applied in winter to prevent the cars skid.
The geotechnical properties of the lower layers were also adjusted to the climatic conditions of Finland, and the application of the technique in other climates need to redo the experiments to find the most appropriate crouch solution for each region.
As a guide for those who wish to do their own experiments, the team indicates that the variables involved include selection of materials used in each layer, design and dimensioning of the layers, construction techniques and maintenance periods.
The Finnish project had the merit of highlighting the need for the concept of adaptation to specific climatic conditions of each area of use in order to reduce costs and maximize the absorption of water.
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