Evolution mechanism of the flash flood-debris flow disaster chain triggered by high-elevation shallow landslides: a case study of the Huangya Gully event in Yuzhong, China, on August 7, 2025 - Yukun Wang; Xingrong Liu; Ziyang Xiao; Yu Wang; Yanjie Ma; Jinyan Huang; Yapeng An; Boyu Li (Landslides, 2026)