Pangestu, Wahyu Yudha, et al. “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”. International Journal of Hydrological and Environmental for Sustainability, vol. 2, no. 2, July 2023, pp. 65-78, https://doi.org/10.58524/ijhes.v2i2.231.