The year 2022, just like its predecessors before, holds the sad primacy of being the warmest and driest year ever recorded, also in Trentino .
Everything starts from a winter that, in the last few years, could count on very few snow events: the snow plant engineering companies have overcome the problem with artificial snow and accumulation basins at high altitudes but the consequences for agriculture and the production of electric energy have been devastating.
In Trentino, in the last few months, the results have been visible to anyone: the Santa Giustina basin lacked 40 meters of water and the lowered level has uncovered, on the left bank, the bridge on the old road above the San Romedio watercourse that had been covered with the fill up of the hydroelectric basin in the fifties. The Garda Lake, on the first of March 2023, recorded a volume of 120 million meter cubes (on the 459 maximum allowed): its level is 46 cm above the hydrometric zero measured in Peschiera del Garda, against the 99 cm of the average value of the same period.
The four rivers carrying water outside Trentino have showed lowered discharge values. Along with the above mentioned case of Adige, the Brenta river in Grigno has recorded a 30 % deficit compared to the same average value of the previous year, in the same period. In the month of January, the Sarca water quota to the Garda Lake was 10 cubic meters/sec against the average 18 (average value of the last ten years). In the month of February, the Chiese river, tributary of the Idro lake, has been estimated up to 2.5 cubic meter/second (against the 4.4 of the last ten years) .
In general, all the superficial water bodies of Trentino (377 among rivers, streams and 21 lakes) and underground water bodies (22) have recorded significant reductions, and, in some cases, the lowest values ever recorded.