 and after the change year either set by year parameter or extracted from tests (statistically estimated). Different background fill colors are used to differentiate seasons types."><title>Plot long-term hydrograph variable changes — gr_plot_periods • grwat</title><script src="../deps/jquery-3.6.0/jquery-3.6.0.min.js"></script><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><link href="../deps/bootstrap-5.2.2/bootstrap.min.css" rel="stylesheet"><script src="../deps/