by Danny O. Calleja
SORSOGON CITY — There is an alarming state of siltation in the major river and all its tributaries that serve as receiving ends of volcanic debris swept down by rain waters from the slopes and crevices of Bulusan Volcano, according to the Department of Science and Technology (DOST).
All smaller tributaries of Cadac-an River, the main river system that traverses the municipalities of Juban and Irosin are now heavily silted even as the Department of Public Works and Highways (DPWH) had recently conducted dredging operations, Gerry Asuncion, the DOST provincial chief said here on Wednesday.
The huge volume of lahar and other volcanic debris stored at the slopes of Mt. Bulusan during its series of eruptions starting since about three years ago and cascaded with rain waters into these river system brought about these siltation, said Asuncion as he warned local disaster management authorities and residents against its consequences.