Streamflow Trends in Central Chile

The availability of water in Chile has shown signs decline recent decades. This is problematic because Chile’s economy depends on mining, forestry, and agricultural activities, all limited by the resources. In this study, daily, monthly annual flows 31 basins located arid–semiarid zones (29°12′ S–33°58′ S) humid–subhumid (34°43′ S–38°30′ were evaluated using Mann–Kendall trend test quantile–Kendall procedure during three periods: 1984–2021 (31 stations), 1975–2021 (20 1969–2021 (18 stations). Results showed that, at level, trends predominantly negative both climatic over periods analyzed. zone, a higher frequency significant was found maximum 1975–2021, compared to last period under study. zone series At other hand, arid-semiarid decrease as number years analyzed increased, for flow types. did not indicate similar defined pattern. Likewise, reduction length time increased but no such pattern observed zone. Furthermore, relationship PDO summer month zones. Consequently, it concluded that are generally negative, their statistical significance studied.