Sudirman, Ilham, and Alamsyah. “Land Gradation Effect Analysis on Permeability and Ponding Time on Repeat Rain Frequency: Laboratory Study With Rainfall Simulator ”. Journal La Multiapp 1, no. 1 (January 30, 2020): 10-17. Accessed April 20, 2026. https://newinera.com/index.php/JournalLaMultiapp/article/view/35.