Direct Hydraulic Parameter and Function Estimation for Diverse Soil Types Under Infiltration and Evaporation

@article{Jiao2016DirectHP,
  title={Direct Hydraulic Parameter and Function Estimation for Diverse Soil Types Under Infiltration and Evaporation},
  author={Jianying Jiao and Ye Zhang and Jianting Zhu},
  journal={Transport in Porous Media},
  year={2016},
  volume={116},
  pages={797-823}
}
A new computationally efficient direct method is applied to estimating unsaturated hydraulic properties during steady-state infiltration and evaporation at soil surface. For different soil types with homogeneous and layered heterogeneity, soil hydraulic parameters and unsaturated conductivities are estimated. Unlike the traditional indirect inversion method, the direct method does not require forward simulations to assess the measurement-to-model fit; thus, the knowledge of model boundary… 
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References

SHOWING 1-10 OF 59 REFERENCES

Estimating Soil Hydraulic Parameters of a Field Drainage Experiment Using Inverse Techniques

Accurate assessment of water flow and contaminant transport in unsaturated porous media at the field scale is often hindered by difficulties associated with obtaining reliable estimates of soil

Tensor Hydraulic Conductivity Estimation for Heterogeneous Aquifers under Unknown Boundary Conditions

A physically based inverse method is developed using hybrid formulation and coordinate transform to simultaneously estimate hydraulic conductivity tensors, steady‐state flow field, and boundary

Simplified Multistep Outflow Method to Estimate Unsaturated Hydraulic Functions for Coarse-Textured Soils

Although the multistep outflow (MSO) method is well suited for the estimation of soil hydraulic properties by inverse solution techniques, this method has not been widely adopted because it requires

RAPID METHOD FOR ESTIMATING THE UNSATURATED HYDRAULIC CONDUCTIVITY FROM INFILTRATION MEASUREMENTS

A method is proposed for estimating the unsaturated hydraulic conductivity from observed infiltration data. Infiltration measurements are generally easier to obtain than experimental data required

Determining Soil Hydraulic Properties from One-step Outflow Experiments by Parameter Estimation: I. Theory and Numerical Studies1

The numerical feasibility of determining water retention and hydraulic conductivity functions simultaneously from one-step pressure outflow experiments on soil cores by a parameter estimation method

Analysis of the inverse problem for transient unsaturated flow

The inverse problem of determining unsaturated soil hydraulic properties from one-dimensional, transient infiltration and redistribution events is analyzed. Hydraulic properties are assumed to be

A direct method of parameter estimation for steady state flow in heterogeneous aquifers with unknown boundary conditions

We propose a novel direct method for estimating steady state hydrogeological model parameters and model state variables in an aquifer where boundary conditions are unknown. The method is adapted from

Inverse modelling of in situ soil water dynamics: investigating the effect of different prior distributions of the soil hydraulic parameters

TLDR
This study explored to which degree prior information about the soil hydraulic parameters can help improve parameter identifiability in inverse modelling of in situ soil water dynamics under natural boundary conditions and formulated three prior distributions that incorporate to different extents the prior informationabout the VGM parameters derived with ROSETTA.

Direct Method of Hydraulic Conductivity Structure Identification for Subsurface Transport Modeling

AbstractSolute transport in aquifers is strongly influenced by the spatial distribution of subsurface hydraulic conductivity (K), while limited drilling typically results in lack of data

A closed-form equation for predicting the hydraulic conductivity of unsaturated soils

A new and relatively simple equation for the soil-water content-pressure head curve, 8(h), is described in this paper. The particular form of the equation enables one to derive closedform analytical
...