This work aims to design a hydraulic model to know the current operation of the drinking water supply network for Korhogo city and to carry out corrective simulations to improve it. To achieve this, we used the EPANET software, to design and simulate the hydraulic model operation using the equal staffing method at each Request Node (DEN). In addition, based on an annual growth rate of 2.08%, the population of the city of Korhogo as well as the total water needs were estimated for different horizons and staffing scenarios. The results indicate that the overall average needs of the city in drinking water for an endowment 45 l/j/ hab. are respectively 678 m3/h for 2020, 750 m3/h for 2025, 830 m3/h for 2030, 1020 m3/h for 2040 and 1252 m3/h for 2050. The simulation of the network with the current injected flow which is 100 l/s, highlight some pressure and speed anomalies. Indeed, the network presents several negative or no conform pressures and unsatisfactory speeds (lower than 0.5 m/s and higher than 2 m/s). The network is apparently undersized and cannot meet the current and future needs of the city. Corrective simulations for optimal network operation until 2030 suggest positive pressures and speeds throughout the city with an endowment of 45 l/j/hab.