Chaiyapong Thepprasit, and Viraphol Taesombat. “Areal Rainfall Reduction Factor and Areal Flood Peak Reduction Factor for Upper Chao Phraya River Basin”. Agriculture and Natural Resources 37, no. 2 (June 30, 2003): 224–233. accessed September 17, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/242865.