How to get there:
From the bridge of Gatta (Town of Castelnovo ne' Monti), along the SP 9, you descend from the town and proceed towards the banks of the river Secchia on a town a road, the springs of Poiano are reached about 2 km.
The Poiano Springs are the main carsic springs of Emilia-Romagna. Unlike most Springs and carsistic springs, whose characteristics relating to the chemical-physical features, remain unaltered for very long periods, the Poiano springs have demonstrated that they are subject to a very quick temporal evolution. Their main characteristic is their characteristic of Sodium Chloride.
To use the thermal characteristics of the waters of this location a structure with 2 pools having different temperatures was built. Scientific Description
The most abundant carsic spring of the region, with an average capacity beyond 700 I/sec., is salted. And it was a lot saltier in 1612: su much to induce Cosimo Bottegari, musician and observant traveler, to write to the Duke of Modena:...as I've tasted various times, and have found it so salted, that it seemed a miracle: besides that I even remained even more capable, through such a huge and continuous abundance, it was like a running river, and looking at each place where it had wet the soil, there was a surface of such candidness, as if covered by a white veil: this whiteness I wanted to taste, and I found it not unlike, thick and pure salt...
It is obvious that the waters of Poiano must have been overly saturated with Sodium chloride, with a content near theoretic solubility of NaCl (357 g n/liter at 1 00 1). The measurements of salt content at Poiano, even though done sporadically only in the last century, show a progressive and rapid decrease on NaCl content (See chart). A complete hydro-chemical measuring of this carsic area, done in 1984, found that all the parameters of Poiano waters (capacity, temperature, chlorides, sulfates, etc.) are not constant but follow a precise seasonal flow with a temporal delay of about 5 months relative to the values found in external water courses. The remarkable influence of the alternating seasons on the Poiano springs constitutes a strong primary clue on the fact that this carsic spring is fed by a mixture of waters with absolutely different chemism (and provenance): the first bicarbonate sulfate, clearly prevailing in quantity and deriving from the meteo-carsic waters, and a second chlorided which is a lot less influenced by local Pluvialmetric waters. The tracing of the carsic feeding basin at last showed that the springs are feed by: Meteoric waters which infiltrate the fractures, dolines and mouths on the evaporites sides degrading towards the Lucola torrent;
from the leakage on the left of the Lucola hydro-graph;
from underground supplies, coming from the basin of the Sologno torrent; by another hydrological circuit which reaches in depth the levels of rock salt and returns up to the spring because of concomitant factors:
- diapirico effect;
- hydration of the anhydrides at great depths;
- effect of the water-proof barrier of the tectonic base contacts of the formation.
Poiano is therefore fed by a mixture of quick carsic waters (the carsic tunnel of Mt Pianella has a time of just a little over 478 hours) with a small fraction of chlorate waters whose exact origin is still not perfectly understood, as is deduced by the isotopic analysis done, it is however to be considered of recent infiltration.