Hydraulic and hydrogeological invariance - rainwater collection

Hydraulic and hydrogeological invariance is a very important building subject, especially nowadays. In fact, it mainly deals with the analysis and solution of any problems arising from the paving and waterproofing of portions of land which will therefore no longer absorb rainwater, but will instead be discharged into areas of land which were not intended for absorption, with possible landslides. of the land, caused in most cases by the fact that the marked increase in the flow rate of runoff water that ends up in the canalization systems, which in turn flows into the receiving channels, overloads the purification plants (sized for very high flows lower) causing extensive damage, such as flooding.

Furthermore, another very important aspect is the possibility of being able to reuse rainwater for domestic purposes, such as irrigation systems or filling of water tanks (even swimming pools) or again, with appropriate purification and filtering systems, such as water maid inside the house.

Consequently, it is extremely important to use solutions that are able to ensure that the rainwater runoff and the related drainage of the area remains unchanged even after the urbanization of the area. 

The regulations on hydraulic invariance are at regional and municipal level and precisely and carefully define the criteria and methods to be respected for each operation that contemplates soil transformation.

To comply with what has been said, we operate by creating infiltration, drainage, accumulation and lamination systems. In this way it will be possible to manage and reuse rainwater.

The basis for applying these criteria to reality is that of the analysis of the permeability of the soil, the volume that the pipes that will convey the water into the storage tanks will occupy, and the volume of the tanks themselves. Furthermore, the calculation will also be influenced by the capacity to dispose of the water in the ground or in the public sewer system. Obviously, to these calculations will be added those relating to the meteorological data of the area subject to the intervention (such as the number of annual rainfall and quantity of rainfall in mm/m2). 

The calculation can refer to the average of the meteorological data, or, based on specific needs, based on the maximum precipitation that occurred through or in all historical data analyzed from the rainfall data.