Back in 2004, heavy rains brought by Typhoon Aere caused disastrous land- and rockslides on both banks of the river. A total of 14 hectares of land collapsed, sending large amounts of soil and silt cascading into the waterway and cutting the Northern Cross-Island Highway.
這個名為「蘇樂崩塌地復育工程」的區域有一條野溪，兩旁山坡因民國 93 年艾利颱風的豪大雨造成土石流災情，土砂大量流入河道，崩塌面積達 14 公頃，造成台 7 線（北橫）中斷。