Floods in South Kalimantan Province were caused by high-intensity rain in mid-January 2021. The same flood inundated the Banjarmasin Campus I area of Lambung Mangkurat University (ULM Campus I). Another flood inundated Campus I ULM in mid-December 2021. The puddle in the area of Campus I ULM reached a height of 50 cm. The research method uses hydrological analysis of rain data to obtain a planned flood discharge with a return period of 2, 5, 10, 20, 25, 50, 100, and 200 years with the Der Weduwen method. Based on the results of the analysis of the flood discharge value for the 2 years return period was 48.68 m³/s, 5 years was 66.63 m³/s, 10 years of 78.35 m³/s, 20 years was 89.30 m³/s, 25 years was 91.56 m³/s, 50 years was 103.57 m³/s, 100 years was 114.46 m³/s, and 200 years was 125.07 m³/s.