Author(s): Celso A. G. Santos; Koichi Suzuki; Masahiro Watanabe; Vajapeyam S. Srinivasan
Linked Author(s): Masahiro Watanabe, Vajapeyam S. Srinivasan
Keywords: Infiltration; Moisture content; Suction; Erosion modeling; Semiarid
Abstract: A method to determine the main parameters in the Green-Ampt infiltration equation is proposed based on indoor experiments carried out with two different samples of sand, and then the method is tested with field data collected in a semiarid region in Brazil. The results proved that the soil moisture content and suction could be aggregated in one parameter called moisture-tension parameter N s, which showed to have a typical change according to the time variable. Thus, a relationship between the number of consecutive dry days and the parameter N s was presented for a test field of a semiarid region in Brazil and a method was given to determine the parameter for the areas where measuring systems are not available on site.
Year: 1999