Abstract
The hydrographic analyses of rainfall-runoff data from storms occurring during the period 1945–1957 were used to estimate soil intake rates and rainfall retention. The intake rates varied from more than 2 inches to less than .01 inch per hour, depending mostly upon antecedent soil moisture and duration of the storms. Irrigation generally reduced intake rate unless accompanied by fertility treatments that greatly increased plant growth. Since the dominant factor affecting water intake was soil-moisture content, the effects of plant cover and irrigation on intake may be partly attributed to their effects on stored soil moisture. The mean values for the initial intake rates (for the first 30 minutes) and average intake rates for the 29 storms analyzed varied with antecedent moisture, management practices, and season of the year. The mean values for the final intake rates (at the end of storm) were not significantly different for the different management practices.
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