“The Impact of Rainfall Fluctuations on the Trophic of Maninjau Lake Based on the Carlson Index and The Comprehensive Index (CTSI)”. Jurnal Serambi Engineering 10, no. 4 (October 20, 2025). Accessed August 19, 2026. http://jse.serambimekkah.id/index.php/jse/article/view/1375.