Comunque sì... c'è da lavorarci ancora.
…ma poi quando si vanno a vedere i riferimenti reali delle citazioni non è che si trovi granché; per esempio Camuffo (2001), in
“LUNAR INFLUENCES ON CLIMATE paragrafo 3.2. THE MONTHLY (LUNAR SYNODIC) CYCLE” https://www.academia.edu/16650047/Lunar_Influences_on_Climate citato da Randall S. et alii (
“Lunar tidal influence on inland river streamflow across the conterminous United States“-
https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2010GL045564)
dice semplicemente
“In some cases the tidal oscillation of the underground water table may induce a variable supply of water to the roots of plants. This fact may explain some particular events in which Moon phase and farming appear related.”Si trovano anche lavori che analizzano l’influenza dei cicli lunari sulle superfici freatiche di falda, magari costiere, come qui
“A study on the influence of tides on the water table conditions of the shallow coastal aquifers” (C. Singaraja, S. Chidambaram, Noble Jacob)
https://link.springer.com/article/10.1007/s13201-018-0654-5Marino Domenico Barberio et alii in
“Diurnal and Semidiurnal Cyclicity of Radon (222Rn) in Groundwater, Giardino Spring, Central Apennines, Italy” https://www.mdpi.com/2073-4441/10/9/1276spiegano bene il meccanismo delle maree solide:
“In addition, attention has been focused on the influence of solid Earth tides on Rn concentrations. Theselong-wave crustal deformations may cause significant responses in the emanation of subsoil gases, due to changes in permeability or in rock media, following the contraction and decompaction cycle of rock material during tidal waves. Hence, solid Earth tides may be responsible for the periodic liberation of Rn, principally via the movement of groundwater in response to the opposing effects of aquifer compression and dilation during tidal crustal displacements. Solid Earth tides have vertical and horizontal components. They uplift the ground up to 30–40 cm, and swing it horizontally up to 10–20 cm, at the passage of the waves. Therefore, particularly due to the horizontal component, the crust is daily undergoing contractional and dilational cycles during the tide travel, determining expulsion and recall of fluids, respectively.”Ma non ho trovato niente di particolare riguardo al comportamento di sorgenti su massicci carbonatici in mezzi fratturati. In ogni caso procedei alla verifica che ti dicevo, procurando i dati delle piogge del tuo periodo di osservazione e sovrapponendole alle portate; certo, l’assenza di una correlazione non ha la stessa forza della presenza di una correlazione positiva, ma è una verifica che devi assolutamente fare.
Buon lavoro
