Seasonal precipitation decreasing in Weihe River Basin, impacting agriculture and water resources.
The researchers analyzed 60 years of precipitation data in the Weihe River Basin. They found that precipitation patterns varied by season, with decreases in spring and autumn. Precipitation days decreased overall, but light rain intensity increased. Rainstorm days peaked from 1976-1990 at some stations. The data showed a 28-32 year cycle in precipitation fluctuations.