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Determination of Infiltration Rates on Marshall Silt Loam from Runoff and Rainfall Records
Author(s) -
Bertoni Jose,
Larson W. E.,
Shrader W. D.
Publication year - 1958
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1958.03615995002200060024x
Subject(s) - loam , infiltration (hvac) , surface runoff , hydrology (agriculture) , storm , silt , environmental science , soil science , geology , soil water , geotechnical engineering , meteorology , geomorphology , geography , biology , ecology , oceanography
Using rainfall intensity and runoff rate measurements for plots with slope lengths of 36.3, 72.6 and 145.2 feet, infiltration rates were determined by the graphical method of Sharp and Holtan for 10 storms occurring during the years 1938 to 1942, inclusive. The plots on Marshall silt loam had been cropped to continuous corn since 1932. The average initial infiltration rate for all storms and all slope lengths was 0.79 inch per hour and the final infiltration rate was 0.21 inch per hour. The final infiltration rate varied with storms and slope lengths from 0.60 to 0.10 inch per hour. The average infiltration rate curve calculated from the mean of all curves for all storms and all slope lengths was expressed by the equation f = 0.211 + 1.019 e ‐0.056t . Final infiltration rate appears to increase up to June and July and then decrease rather sharply during August and September.