Pangestu WY, Adnyano AIA, Wardana NK. Comparative Analysis of Actual Conditions and Results of Technical Calculations Using Gumbell Method in Mine Dewatering System: A Case Study on Calculation of Rainfall and Runoff Water Discharge. int. j. hydrol. environ. sustain. 2023;2(2):65-78. doi:10.58524/ijhes.v2i2.231