1 Faculty of Environmental Management, Prince of Songkla University, Hatyai Campus, Songkhla;
2 Faculty of Science and Industrial Technology, Prince of Songkla University, Suratthani Campus, Suratthani;
3 Faculty of Department of Geosciences, Prince of Songkla University, Hatyai Songkhla.
Correspondence: Chutima Sriyaporn, E-mail: