Groundwater flow in managed aquifer recharge areas on alluvial fans is influenced by artificial recharge and decaying hydraulic conductivity. A study found that as hydraulic conductivity decreases with depth or length, artificial recharge has a greater impact on groundwater flow. Flow directions shift from horizontal to vertical, increasing groundwater age and variability. The distribution of ambient and artificially recharged water follows logarithmic, exponential, and power law patterns. The thickness of the recharged water lens and travel times increase with decreasing hydraulic conductivity. These findings are crucial for managing aquifer recharge in alluvial fan areas and highlight the importance of considering decreasing hydraulic conductivity with depth and length.