Rainfall Infiltration Modeling: A Review

Morbidelli, Renato; Corradini, Corrado; Saltalippi, Carla; Flammini, Alessia; Dari, Jacopo; Govindaraju, Rao S.

doi:10.3390/w10121873

Cited by 57 publications

(52 citation statements)

References 125 publications

(180 reference statements)

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“…The discussion has gradually moved from macropore flow to preferential flow that summarizes all the flows in unsaturated porous media not obeying the Richards equation [4]. Numerous reviews on macropore flows, preferential flows, non-equilibrium flows, and non-uniform flows in permeable media appear periodically, and only the latest are here referenced [5,27].…”

Section: Dual Porosity Approachesmentioning

confidence: 99%

“…Fast flow and transport are usually attributed to preferential flow in the macropore domain, while slower movements are supposedly due to flow in the capillary domain as expressed with Richards' [3], allowing for exchanges between the two domains as, for instance [4] and [5] have recently compiled. This contribution favors a dual-process approach to infiltration and drainage over dual-porosity approaches, thus avoiding the a-priori delineation between 'macropores' and the remaining porosity.…”

Section: Introductionmentioning

confidence: 99%

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Viscosity Controls Rapid Infiltration and Drainage, Not the Macropores

Germann

2020

Water

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The paper argues that universal approaches to infiltration and drainage in permeable media pivoting around capillarity and leading to dual porosity, non-equilibrium, or preferential flow need to be replaced by a dual process approach. One process has to account for relatively fast infiltration and drainage based on Newton's viscous shear flow, while the other one draws from capillarity and is responsible for storage and relatively slow redistribution of soil water. Already in the second half of the 19th Century were two separate processes postulated, however, Buckingham's and Richards' apparent universal capillarity-based approaches to the flow and storage of water in soils dominated. The paper introduces the basics of Newton's shear flow in permeable media. It then presents experimental applications, and explores the relationships of Newton's shear flow with Darcy's law, Forchheimer's and Richards' equations, and finally extends to the transport of solutes and particles.

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Section: Dual Porosity Approachesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Viscosity Controls Rapid Infiltration and Drainage, Not the Macropores

Germann

2020

Water

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“…Jarvis et al (2016) summarized as preferential all the flows in unsaturated porous media not obeying Richards' (1931) equation. See also Morbidelli et al (2018) for a recent review on infiltration approaches. Beven (2018) argued that, for about a century, the hardly questioned preference given to capillarity denied recognition of concepts considering flow along macropores, pipes, and cracks.…”

Section: Review Of Infiltration Conceptsmentioning

confidence: 99%

Newton's Shear Flow Applied to Infiltration and Drainage in Permeable Media

Germann¹

2019

Preprint

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The paper argues that universal approaches to infiltration and drainage in permeable media that pivot around capillarity and that led to dual porosity, non-equilibrium, or preferential flow need to be replaced by a dual process approach. One process has to account for relatively fast infiltration and drainage based on Newton's shear flow, while the other one is responsible for storage and relatively slow redistribution of soil water by focusing on capillarity. Already Schumacher (1864) postulated two separate processes. However, Buckingham's (1907) and Richards' (1931) apparent universal capillary-based approach to flow and storage of water in soils dominated. The paper introduces the basics of Newton's shear flow in permeable media. It presents experimental support for the four presumptions of (i) sharp wetting shock fronts; (ii) that move with constant velocities; (iii) atmospheric pressure prevails behind the wetting shock front; (iv) laminar flow. It further discusses the scale tolerance of the approach, its relationship to Darcy's (1856) law, and its extension to solute transport.

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“…A large number of modelling approaches have been developed to simulate the temporal dynamic of soil moisture and evaluate deep percolation for use in a wide range of applications e.g., research, management and risk assessment of subsurface systems [15,16]. Many of these models are based on a conceptual representation of the system, which inherently involves a number of important assumptions [6].…”

Section: Introductionmentioning

confidence: 99%

“…Many of these models are based on a conceptual representation of the system, which inherently involves a number of important assumptions [6]. Some of the models used are approximations (numerical models) [17][18][19], while others are analytical solutions [16,20,21]. These models cannot, however, provide the profile of water content without large simplifications of the soil description.…”

Section: Introductionmentioning

confidence: 99%

Modelling Projected Changes in Soil Water Budget in Coastal Kenya under Different Long-Term Climate Change Scenarios

Okello

Greggio

Giambastiani

et al. 2020

Water

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The possible impacts that climate change will have on soil water budget and specifically on deep percolation, runoff and soil water content have been investigated using HYDRUS, a methodology based on numerical modelling simulations of vertical water movement in a homogenous soil column on a flat surface. This study was carried out on four typical soil types occurring on the Kenyan coast and the adjacent hinterlands of up to an elevation of 200 m above sea level (m a.s.l.) covered by five weather stations (two dry and three wet stations). Results show that deep percolation and runoff are expected to be higher in 2100 for both Relative Concentration Pathways (RCPs) 2.6 and 8.5 scenarios than they were for the reference period (1986–2005). The average deep percolation is expected to increase by 14% for RCP 2.6 and 10% for the RCP 8.5, while the average runoff is expected to increase by 188% and 284% for the same scenarios. Soil water content is expected to either increase marginally or reduce depend in the same scenarios. The average soil water content is also expected to increase by 1% in the RCP 2.6 scenario and to decrease by 2% in the RCP 8.5 scenario. Increase in deep percolation through clay soil is expected to be the largest (29% in both scenarios), while sandy and sandy clay soil are expected to be the least influenced with an average increase of only 2%. Climate change is expected to impact runoff mostly in sandy soils, whereas the least affected would be clay loam soils. These results further support the assertion that the change in climate is expected to impact the recharge of aquifers by triggering an increase in infiltration under both scenarios.

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Rainfall Infiltration Modeling: A Review

Cited by 57 publications

References 125 publications

Viscosity Controls Rapid Infiltration and Drainage, Not the Macropores

Viscosity Controls Rapid Infiltration and Drainage, Not the Macropores

Newton's Shear Flow Applied to Infiltration and Drainage in Permeable Media

Modelling Projected Changes in Soil Water Budget in Coastal Kenya under Different Long-Term Climate Change Scenarios

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