A hybrid coupled model of surface and subsurface flow for surface irrigation

Dong, Qianli; Xu, Di; Zhang, Shaohui; Bai, Meijian; Li, Yinong

doi:10.1016/j.jhydrol.2013.07.018

Cited by 13 publications

(15 citation statements)

References 20 publications

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“…Previous studies [7] have shown that a satisfactory convergence criterion can be set as the difference in the computation outcomes of two successive computation steps is no larger than 0.1%. This convergence criterion is adopted here and mathematically, it is expressed as…”

Section: Convergence Criteria For Numerical Computationmentioning

confidence: 99%

“…As such, slope surface runoff takes place and the infiltration rate is now equal to the infiltration capacity of the surface soils under saturated conditions. Models have been developed to describe this rainfall-infiltration-runoff process for slopes where the infiltration capacity of soils across a slope is more or less similar; for example, differences in coefficient of permeability are usually within one order of magnitude [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Integrative Analysis of Surface Runoff and Macropore Flow for Slopes under Rainfall Conditions

Que

Lin

2018

Mathematical Problems in Engineering

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Estimating runoff and infiltration in slopes is essential to predict flooding and landslide triggering. An approach jointly using a dual-permeability model and a kinematic wave model was proposed for integrative analyses of infiltration and surface runoff of rainwater for slopes with macropores in soils subjected to rainfalls. Laboratory tests were conducted to evaluate the performance of the proposed approach. Analyses showed that the presence of macropores greatly facilitates rainwater movement in the slope and the maximum depth of wetting front could be one order of magnitude larger than in cases without macropores. The influence of rainfall intensity, initial pore water pressure, coefficient of permeability of soil matrix, and slope angle was also examined.

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Section: Convergence Criteria For Numerical Computationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integrative Analysis of Surface Runoff and Macropore Flow for Slopes under Rainfall Conditions

Que

Lin

2018

Mathematical Problems in Engineering

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“…The approach calculates two-dimensional infiltration flux as the sum of one-dimensional infiltration and a second term labeled the edge effect. Dong et al [11] presented a hybrid coupling strategy by distinguishing the mass conservation and momentum conservation of surface flow and subsurface flow systems to reduce the iteration times of the momentum conservation equation and increase the simulation accuracy of coupled models. They proposed a coupling strategy, where the mass conservation component of surface flow model and subsurface flow model are iteratively coupled at the same time step to obtain the convergence value of surface flow depth, and then the momentum conservation component of surface flow model was externally coupled based on the convergence value of both the surface flow depth and infiltration rate to update the surface flow velocity.…”

Section: Introductionmentioning

confidence: 99%

Modeling Two-Dimensional Infiltration with Constant and Time-Variable Water Depth

Castanedo

Saucedo²,

Fuentes

2019

Water

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Water infiltration is simulated by obtaining the time infiltrated depth evolution and humidity profiles with the numerical solution of the two-dimensional Richards’ equation. The contact time hypothesis is accepted in this study and used to apply a unique form on time of the water depth evolution in the solution domain (furrow), as boundary condition. The specific form of such evolution in time was obtained from results reported in the literature based on the internal numerical full coupling of the Saint-Venant and Richards’ equations in border irrigation. Moreover, the equivalent hydraulic area between the border and the furrow was achieved by scaling the values of water depth. The analysis was made for three contrasting soil textures, and the comparison was done by computing the root mean square error (RMSE) indicator. The comparison was performed from the selection of five finite element meshes with different densities to discretize the solution domain of the two-dimensional Richards’ equation, combined with several time steps. Finally, a comparison was made between infiltrated depth evolution calculated with a constant water depth in the furrow to the one proposed in this work, finding important differences between both approaches. To expand the scope of this study and for a fuller exploration of the subject, the results were compared with results obtained by applying the HYDRUS-2D software. The results confirm that it is important to consider an internal full coupling of the Saint-Venant and Richards´ equations to improve furrow irrigation simulations.

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“…Godunov-type Finite Volume (FV) schemes have been successfully applied to simulate overland flow over pervious and impervious lands (Bradford and Katopodes, 2001;Bradford and Sanders, 2002;Brufau et al, 2002;Burguete et al, 2009;Dong et al, 2013). The FV schemes solve the integral form of the overland flow and solute transport equations, thus being mass conservative both globally and locally.…”

Section: Introductionmentioning

confidence: 99%

A hybrid finite volume-finite element model for the numerical analysis of furrow irrigation and fertigation

Brunetti

Šimůnek

Bautista

2018

Computers and Electronics in Agriculture

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A B S T R A C TThis study presents a hybrid Finite Volume -Finite Element (FV-FE) model that describes the coupled surfacesubsurface flow processes occurring during furrow irrigation and fertigation. The numerical approach combines a one-dimensional description of water flow and solute transport in an open channel with a two-dimensional description of water flow and solute transport in a subsurface soil domain, thus reducing the dimensionality of the problem and the computational cost. The modeling framework includes the widely used hydrological model, HYDRUS, which can simulate the movement of water and solutes, as well as root water and nutrient uptake in variably-saturated soils. The robustness of the proposed model was examined and confirmed by mesh and time step sensitivity analyses. The model was theoretically validated by comparison with simulations conducted with the well-established model WinSRFR and experimentally validated by comparison with field-measured data from a furrow fertigation experiment conducted in the US.

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A hybrid coupled model of surface and subsurface flow for surface irrigation

Cited by 13 publications

References 20 publications

Integrative Analysis of Surface Runoff and Macropore Flow for Slopes under Rainfall Conditions

Integrative Analysis of Surface Runoff and Macropore Flow for Slopes under Rainfall Conditions

Modeling Two-Dimensional Infiltration with Constant and Time-Variable Water Depth

A hybrid finite volume-finite element model for the numerical analysis of furrow irrigation and fertigation

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