Prediction of infiltration from soil hydraulic properties

Abstract

Field and laboratory infiltration measurements using infiltrometers have been the only methods of effectively determining the infiltration rates of soils. Infiltration is mainly controlled by soil hydraulic properties, especially the hydraulic conductivity. Due to the ease with which the saturated hydraulic conductivity can be determined, it is often preferred to the unsaturated hydraulic conductivity in hydrological studies. It is well known that, at saturation the steady state infiltrability controls the infiltration process. Thus, it is very clear that the saturated hydraulic conductivity and steady state infiltrability may be closely related in one way or the other, as suggested in some few studies, wherein functions have been developed to relate these two parameters. However, these functions are often site specific and do not always carry out accurately all the time. Determination of can be tedious and time consuming, whereas can be easily determined in the laboratory. The present study aimed to assess the predictability of a modified Philip's equation by substituting for. In this study, field infiltration measurements were conducted in two soil types under three different land use systems with a single ring infiltrometer. Field and laboratory hydraulic and hydrologic experiments were conducted on soils in a turf grass, an arable land and a pastureland in the

Heterogeneity in Event-Based Soil Hydrologic Response to Different Land Use Types in Upper River Njoro Catchment, Kenya

“…Patil et al [24] observed that soil infiltration capacity was a key parameter influencing the occurrence of soil hydrologic response hence its spatial variability at different agricultural plots is important to for water resource planning and designing of hydraulic structures. Infiltration capacity is controlled by soil hydraulic properties and field and laboratory measurement are the only effective ways of its determination [27]. Information on how the land use types affects on-site hydrologic response and generation of stream flow is scanty in the URiNC.…”

Parameterising and Adapting Ecosystem Service Models in Data Sparse Regions: Gaps, Guidelines, and an Application in the Vietnamese Mekong Delta

“…In other words, Ksat represents the limiting value of infiltration if the soil is saturated and homogenous (Arrington et al, 2013). In fact, Ksat can be substituted for Io in equations for infiltration estimates in Ghana (Tuffour et al, 2018). Similarly, soil water infiltration modelled by I = Ksat were close to those modelled by Parlange model under ponding conditions (Dejun & Zhengfu, 2011).…”

“…Infiltration modelling using measurable soil hydraulic parameters is essential for obtaining these infiltration rates. A number of predictive infiltration models were developed to estimate infiltration rates (Tuffour et al, 2018). The four most commonly adopted models in applied hydrology are the Philip model, the Green-Ampt model, the Smith model and the Parlange model (Morbidelli et al, 2018;Tuffour et al, 2019).…”

“…In many infiltration models, infiltration rate I(t) is a function of soil hydraulic conductivity (Ksat) (Canarache et al, 1968;Komatsu, 2018 ;Tuffour et al, 2018). Ksat reflects the soil's ability to transmit water through soil pore spaces, which is closely connected with hydrologic infiltration processes and land cover's properties (Bormann & Klaassen, 2008;Gonzalez-Sosa et al, 2010;Trinh et al, 2018).…”