Stochastic analysis of three-dimensional hydraulic conductivity upscaling in a heterogeneous tropical soil

Godoy, Vanessa A.; Zuquette, Lázaro Valentin; Gómez‐Hernández, J. Jaime

doi:10.1016/j.compgeo.2018.03.004

Cited by 14 publications

(5 citation statements)

References 67 publications

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“…All datasets followed a normal distribution as determined by applying the K-S test. K Sat data presented a non-normal distribution, agreeing with results widely reported in the literature (Ahuja et al 2010;Godoy et al 2018;She et al 2017). Therefore, the original K Sat data was fourth root transformed (Elsenbeer et al 1992) in order to use Matheron's classical semivariance estimator (Fig.…”

Section: Exploratory Analysessupporting

confidence: 91%

Identifying Covariates to Assess the Spatial Variability of Saturated Soil Hydraulic Conductivity Using Robust Cokriging at the Watershed Scale

Soares

Centeno

Timm

et al. 2020

J Soil Sci Plant Nutr

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The mapping of saturated soil hydraulic conductivity (K Sat) is essential to understanding soil water dynamics and is a sensitive input in hydrological modeling. The objectives of this study were to provide a reference for the selection of soil hydrology and other environmental attributes that can be used as covariates for estimating K Sat and to compare the efficiency of univariate ordinary kriging versus ordinary robust cokriging, using selected soil hydrology and environmental attributes. Data sets were obtained from a sample grid of 179 points established in the Ellert creek watershed (ECW), located in Rio Grande do Sul state, Southern Brazil. K Sat , macroporosity, microporosity, total porosity, and bulk density were determined from soil sampled at each point. Data of land use and elevation were also applied. All data sets were firstly submitted to classical statistics. Boxplot graphics were constructed to evaluate the relationship between K Sat and land uses. Spearman coefficient of correlation between K Sat and the other attributes was also assessed. For the assortment of covariates, cluster analysis was applied. Classical and robust estimators were applied to calculate the auto and cross-semivariograms and hereafter the ordinary kriging and cokriging. The Spearman coefficient showed some inconsistencies among the applied variables, suggesting that the multivariate method was more appropriate. All cross-semivariograms, except for land use, showed results with better accuracy than the auto-semivariograms. From the methods applied, the best estimates of K Sat were obtained using the robust cokriging method, using macroporosity and soil bulk density as covariates.

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Section: Exploratory Analysessupporting

confidence: 91%

Identifying Covariates to Assess the Spatial Variability of Saturated Soil Hydraulic Conductivity Using Robust Cokriging at the Watershed Scale

Soares

Centeno

Timm

et al. 2020

J Soil Sci Plant Nutr

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“…research; the second is that Quaternary loose strata, which include deposits from various sedimentary sources, possess complicated spatial structural characteristics [27,28], especially with respect to the origin of continental deposits. Hence, directly studying the sedimentary characteristics of Quaternary loose strata using locally limited data results in a large degree of uncertainty [29]. 3D geological modeling is an ideal solution to these issues [30][31][32].…”

Section: Global Discrete Point Interpolation and Encryption Of Quater...mentioning

confidence: 99%

Study on the Construction of 3D Geological Model of Quaternary Loose Sedimentary Strata Based on the Global Stratigraphic Discrete Points

Zhu

Yan

Zhang

et al. 2022

Water

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Accurately depicting the spatial structure characteristics of Quaternary loose sedimentary strata is not only of great significance for the research of Quaternary geological evolution, but also for the analysis of spatial variation characteristics of the inner hydrogeological and engineering geological attributes of the strata. In this study, an approach for constructing a 3D geological model of Quaternary loose sedimentary strata is proposed based on global stratigraphical discrete points. The approach obtains the discrete control point set of each stratum by using limited borehole data for interpolation and encryption, and the contact relationships and intersection modes of adjacent strata can be determined via the analysis of stratigraphic sequence; finally, taking these as the professional basis, the construction of the 3D geological model of Quaternary loose sedimentary strata can be carried out. This application can not only accurately describe the three-dimensional spatial distribution characteristics of the Quaternary loose sedimentary strata, it can also be used to perform a layered simulation of the spatial variation characteristics of the inner geological properties of the Quaternary loose sedimentary strata, such as lithology, porosity, and water content, by taking the three-dimensional spatial framework of each stratum as the simulation boundary. Finally, this study takes the citizen center of Xiong’an new area as an example in order to verify the reliability and advancement of the 3D geological modeling scheme.

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“…Frequently, the scarcity of field data in subsurface-related applications is mitigated by the use of a geostatistical stochastic approach (Gelhar, 1986, Linde et al, 2015, Godoy et al, 2018. In this approach, uncertainty is addressed by generating independent realizations of a sample of a subsurface formation.…”

Section: Equivalent Conductivity and Connectivitymentioning

confidence: 99%

Equivalent hydraulic conductivity, connectivity and percolation in 2D and 3D random binary media

Colecchio

Otero

Nœtinger

et al. 2021

Advances in Water Resources

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Stochastic analysis of three-dimensional hydraulic conductivity upscaling in a heterogeneous tropical soil

Cited by 14 publications

References 67 publications

Identifying Covariates to Assess the Spatial Variability of Saturated Soil Hydraulic Conductivity Using Robust Cokriging at the Watershed Scale

Identifying Covariates to Assess the Spatial Variability of Saturated Soil Hydraulic Conductivity Using Robust Cokriging at the Watershed Scale

Study on the Construction of 3D Geological Model of Quaternary Loose Sedimentary Strata Based on the Global Stratigraphic Discrete Points

Equivalent hydraulic conductivity, connectivity and percolation in 2D and 3D random binary media

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