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Solution to Green–Ampt infiltration model using a two‑step curve‑fitting approach

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Title Solution to Green–Ampt infiltration model using a two‑step curve‑fitting approach
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Creator Shakir Ali
Adlul Islam
 
Subject Green–Ampt • Explicit model • Infiltration • Marquardt’s algorithm
 
Description Not Available
Infiltration is an important hydrological process affecting the runoff, groundwater recharge and solute transport process.
The Green–Ampt (GA) model, describing one-dimensional infiltration process, yields an implicit equation for estimation of
cumulative infiltration with time. In this paper, an explicit approximation to the GA model is derived using two-step curvefitting
technique. The Marquardt’s algorithm is employed for least-squares estimation of nonlinear parameters. Performance
of the proposed model is compared with the implicit GA model using numerical and published field experimental data. The
quantitative statistical indicators namely, percent relative error (RE), maximum absolute percent relative error (MARE),
percent bias (PB), and Nash–Sutcliffe modeling efficiency (E), are used to assess the performance of the proposed model. The
solution of the proposed model matched very well with that of the implicit GA model with MARE ≤ 0.146%, PB ≤ 0.070%,
and E value approximately equal to 1 for both the dimensionless numerical and dimensional field experimental infiltration
estimates. Simulation results of the proposed model demonstrated the capability of the derived model in estimating infiltration
rate and cumulative infiltration accurately and can be applied to solve variety of real-life hydrological problems.
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Date 2020-06-12T09:35:36Z
2020-06-12T09:35:36Z
2018-03-27
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/37122
 
Language English
 
Relation Not Available;
 
Publisher Not Available