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Predicting Runoff Initiation Times Under Field Conditions in Tropical (Hawaii) Soils
Author(s) -
Ahuja L. R.,
Dangler E. W.,
ElSwaify S. A.
Publication year - 1976
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/sssaj1976.03615995004000050042x
Subject(s) - surface runoff , soil water , environmental science , antecedent (behavioral psychology) , hydrology (agriculture) , soil science , saturation (graph theory) , infiltration (hvac) , antecedent moisture , water content , runoff curve number , geology , geotechnical engineering , mathematics , geography , ecology , psychology , developmental psychology , combinatorics , meteorology , biology
Runoff initiation times measured during field rain‐simulation studies on 10 important Hawaii soils are examined in relation to antecedent soil‐water status. The experimental data show considerable scatter due mainly to natural soil variability within a soil series. However, the data exhibited a fairly proportional relationship between runoff initiation time and antecedent soil saturation deficit (final minus initial soil‐water content), in accordance with a simple Green‐Ampt type equation. The results indicate a potential method for estimating erosive portions of rainstorms and subsequent soil loss hazards in relation to varying antecedent soil‐water contents during different seasons of the year.