Evapotranspiration and the water budget of prairie potholes in North Dakota

The mass-transfer method was used to study the hydrologic qehavior of 10 prairie potholes in central North Dakota during t~e 5-year period 1960-64. Many of the potholes went dry when precipitation was low. The average evapotranspiration during the May to October period each year was 2.11 feet, and the average seepage was 0.60 foot. These averages remained nearly constant for both wet and dry years.