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<br />Zwolinski, M.J., 1971, Effects of fire on water infiltration rates in a ponderosa pine <br />stand, in Hydrology and Water Resources in Arizona and the Southwest: <br />Arizona Section American Water Resources Association and the Hydrology <br />Section Arizona Academy of Sciences, Tempe, Arizona, April 22-23, 1971, <br />Proceedings, v. 1, p. 107-112. <br />This study evaluated the infiltration capacity of a silt loam in an unburned, lightly burned <br />(soil temperatures <200oF) and heavily burned (soil temperatures 350-550oF) ponderosa <br />pine stand in east-central Arizona. Soils in the study area were derived from volcanic cinders <br />and basalt slag. Infiltrometer plots revealed that both burn treatments caused signifIcant <br />decreases in infiltration capacity immediately after fire. However, these differences could <br />not be detected during the second and third summers. The author notes that most of the <br />hydrographs exhibited a depression 5 to 15 minutes after the initial water application, and <br />attributes this characteristic to water repellency in the soil. <br /> <br />. <br />. <br /> <br />41 <br />