Soil-water evaporation dynamics were studied using heat-pulse sensors in central Iowa. By analyzing soil heat flux and changes in heat storage, researchers identified the depth and location of the evaporation zone within the soil. Results showed that evaporation rates were highest near the soil surface immediately after rainfall, with the evaporation zone moving deeper into the soil profile over time. Evaporation occurred simultaneously at different depths but with varying peak rates. This study highlights the importance of fine-scale measurements in understanding soil-water evaporation processes.