Regional assessment of heavy metal–related ecological risks in the Houjing river sediments in Taiwan: A study using indexes and extreme gradient boosting model - Hong Giang Hoang; Mohammed Hadi; Minh Ky Nguyen; Chitsan Lin; Ngoc Son Hai Nguyen; Ha Manh Bui; Huu-Tuan Tran; Thi Thu Huyen Dong (Regional Studies in Marine Science, 2026)