Which factor does NOT influence the amount of runoff?

Wind speed does not influence the amount of runoff in the same way that the other factors do. Runoff primarily results from precipitation interacting with the landscape. The intensity of rainfall directly determines how much water enters the ground versus how much flows over the soil surface, leading to runoff. The type of vegetation affects how much water is absorbed by the soil; different plants have varying capacities for retaining moisture, directly impacting runoff. Similarly, the soil surface character, including its texture and ability to infiltrate water, plays a critical role in determining how much water runs off versus how much soaks into the ground. Wind speed, although it can affect evaporation and drying rates, does not have a direct effect on the volume of runoff generated from rainfall. Therefore, it is the least relevant factor regarding runoff generation.