Preliminary analysis of a heavy rainfall–induced landslide on a slope with a photovoltaic power station in Hoengseong County, Gangwon Province, South Korea.

Following the MPPS installation (2018-2021), rainfall events exceeding the threshold also occurred yearly; however, their intensities were much lower than those of the 2022 landslide-triggering rainfall event (Fig. 3Hyetograph and cumulative curve of the heavy rainfall event that triggered the landslide at the study site The rainfall intensity-duration (I-D) conditions that triggered the landslide on August 9, 2022, exceeded the threshold for South Korea (Fig. This landslide happened during a lull of the continuing rain with a relatively low intensity of 4.5 mm/h. Before the beginning of the rainfall event that triggered the landslide, the 3-day (i.e., 72 h), 5-day, and 7-day antecedent rainfall amounted to 0 mm, 46 mm, and 72 mm, respectively. [Extracted from the article]