Geobreak 62: Calcolo Invarianza Idraulica | sinocloud.it
Geobreak 62: Hydraulic Invariance Calculation
GIS application to automate hydraulic invariance calculations, developed by GTER
I am proud to have collaborated with GTER and Antonio Annis on the production of this Geobreak episode. The video presents an innovative GIS application developed by GTER in collaboration with specialist Antonio Annis, designed to automate the calculation of hydraulic invariance.
The fundamental principle
This fundamental principle requires that urban transformations do not increase rainwater flows into sewer networks or water bodies compared to the original situation.
The tool integrates cartographic data and regional regulations, particularly those of Lazio, Marche and Emilia-Romagna, making it easier for designers to estimate the compensation volumes required.
Through the WebGIS interface, users can locate an area and enter technical parameters to instantly obtain detailed hydrological reports. This technological solution aims to prevent hydrogeological risk by ensuring sustainable management of stormwater in urbanized areas.
Who contributed to this project?
GTER
Company specialized in geomatics, GIS and innovative territorial solutions. Developer of the GIShosting platform.
Visit websiteAntonio Annis
Specialist in hydrology and hydraulic modeling. Contributed to the development of the calculation algorithm.
LinkedIn ProfileSarino Alfonso Grande
Technical developer of the WebGIS and presenter on behalf of GTER. GIS analyst, Python/Flask developer and QGIS instructor based in Mandatoriccio (CS), Italy.
About meFrequently asked questions about hydraulic invariance
Everything you need to know about the principle of hydraulic invariance
Hydraulic invariance is a principle requiring that land transformations (urbanization, soil sealing) do not increase the runoff of rainwater into sewer networks or natural water bodies compared to the previous situation.
It is essential for preventing flooding and hydrogeological instability. Urbanization increases impermeable surfaces, accelerating rainwater runoff. Without compensation, this overloads sewer networks and watercourses, causing flooding.
The main ones are Lombardy, Emilia-Romagna, Lazio, Marche, Veneto and Piedmont. Each region has specific regulations with different coefficients and calculation methods to determine the required attenuation volumes.
These are temporary storage volumes for rainwater (tanks, drainage trenches, green roofs) that release water gradually, offsetting the increased runoff caused by soil sealing.
It is generally required for building projects that alter soil permeability: new construction, extensions, parking lots, paved areas. Thresholds vary by region (e.g. in Lombardy for areas > 100-1000 sqm).
Underground attenuation tanks, soakaway pits, drainage trenches, permeable pavements, green roofs, rain gardens and rainwater harvesting systems for irrigation or domestic reuse.
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