What is Kostiakov equation?
What is Kostiakov equation?
Prediction models for infiltration rates Kostiakov model: Kostiakov (1932) proposed an equation to calculate cumulative infiltration(1) F = a t b where F = cumulative infiltration capacity, a and b are constants with a > 0 and 0 < b < 1.
What is Horton equation?
The original Horton equation was given as follows. (1) f ( t ) = f c + ( f 0 – f c ) e – k t where f0 is the initial value of infiltration capacity (mm/h) at the beginning of rainfall; k is the soil-specific decay constant.
What are the models in predicting soil infiltration?
Sihag, Tiwari & Ranjan (2017a) proposed a Novel Model for the estimation of infiltra- tion rate through soil. This study includes two most popular infiltration models: Kostiakov Model (KM) and Philip Model (PM).
What is Horton model?
The Horton method describes how infiltration capacity declines as the precipitation event advances and is based on generating runoff when rainfall intensity exceeds the infiltration capacity. In addition, the modified Horton’s equation describes the recovery of infiltration capacity during dry periods.
How do you calculate infiltration?
Compute infiltration rate (I) by dividing water depth (H) by elapsed time (t). I = H/t 5.
What is Green Ampt equation?
The Green and Ampt equation (1911) is a half-empirical and half-theoretical model describing the soil water infiltration process, originally in homogeneous soil and later extended to layered soils [18,19].
What is the Green Ampt equation?
How do Horton’s models fit?
The Horton’s model for infiltration rate obtained by semi-log plot method was obtained as i=20 + 94 e-1.02t, where i=infiltration rate (mm/hr) and t= time (min). The coefficient of determination obtained when the infiltration model was applied to observation data taken at various points in the field were found to 0.96.
Which equation is used to express infiltration capacity?
The rate of decay of infiltration capacity parameter is k = 3 h-1. For the precipitation hyetograph tabulated below, carry out a complete infiltration analysis, including evaluation of cumulative infiltration and rate of production of precipitation excess, s + v.
What is Green-Ampt method used for?
The Green-Ampt (G-A) infiltration model (i.e., the G-A model) is often used to characterize the infiltration process in hydrology. The parameters of the G-A model are critical in applications for the prediction of infiltration and associated rainfall-runoff processes.
What is Philip’s equation?
The equation was reformulated as / – cKf = l/2Sr “*, where / is the infiltration rate,S the sorptivity, t the time, Kf the field-measured final infiltration rate, and c, a coefficient relating Kf to the Philip parameterA.
What are the application Horton’s infiltration curve?