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Chunmei Wang, Qinke Yang, David Laurence Barry Jupp and Guowei Pang
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Thiago dos Santos Gonçalves, Harald Klammler and Luíz Rogério Bastos Leal
Aquifer properties, such as hydraulic transmissivity T and its spatial variability, are fundamental for sustainable groundwater exploitation in arid regions. Especially in karst aquifers, spatial variability can be considerable, and the application of ge...
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Fansheng Zhang, Lianglin Dong, Hongbo Wang, Ke Zhong, Peiyuan Zhang and Jinyan Jiang
During the construction of underground engineering, the prediction of groundwater distribution and rock body permeability is essential for evaluating the safety of the project and guiding subsequent design and construction. This article proposes an objec...
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Basil Onyekayahweh Nwafor, Maman Hermana and Mohamed Elsaadany
The application of geostatistics in seismic inversion techniques has been proven somewhat reliable in the delineation of reservoir properties and has recently attracted the attention of many geoscientists. However, there are cases where its prediction re...
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Tomislav Malvic, Josip Iv?inovic, Josipa Velic and Rajna Rajic
The semivariogram and the ordinary kriging analyses of porosity data from the Sava Depression (Northern Croatia), are presented relative to the Croatian part of the Pannonian Basin system. The data are taken from hydrocarbon reservoirs of the Lower Ponti...
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Carlos Yasojima, João Protázio, Bianchi Meiguins, Nelson Neto and Jefferson Morais
Kriging is a geostatistical interpolation technique that performs the prediction of observations in unknown locations through previously collected data. The modelling of the variogram is an essential step of the kriging process because it drives the accu...
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Wang Xin, Tang Can, Wang Wei and Li Ji
Aiming at the change detection of water resources via remote sensing, the non-subsampling contour transformation method combining a log-vari model and the Stractural Similarity of Variogram (VSSIM) model, namely log-vari and VSSIM based non-subsampled co...
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Jean-Pierre Rossi and Gauthier Dobigny
Combining multivariable statistics and geostatistics with landscape metrics, we attempted to quantify the spatial pattern of urbanization in the city of Niamey, Niger. Landscape metrics provided local quantification of both landscape composition and phys...
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Tomislav Malvic, Josip Iv?inovic, Josipa Velic and Rajna Rajic
The semivariogram and the ordinary kriging analyses of porosity data from the Sava Depression (Northern Croatia), are presented relative to the Croatian part of the Pannonian Basin system. The data are taken from hydrocarbon reservoirs of the Lower Ponti...
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Yawu Noumonvi Sena, Karem Chokmani, Erwan Gloaguen and Monique Bernier
In Eastern Canada, the snow survey network is highly optimized at the operational scale. However, it is commonly accepted that the network is limited when it comes to studying the spatial variability of the snow water equivalent (SWE), which forms differ...
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Alessandro Mazza
Pág. 1 - 18
Precipitation during the period 2001?2016 over the northern and central part of Tuscany was studied in order to characterize the rainfall regime. The dataset consisted of hourly cumulative rainfall series recorded by a network of 801 rain gauges. The ter...
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Jinliang Zhang, Longlong Liu and Ruoshan Wang
In this study, three-dimensional (3-D) geostatistical models were constructed to quantify distributions of sandstone and mudstone. We propose a new method that employs weight coefficients to balance the sandstone and mudstone data from irregular well pat...
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Chenji Wei, Hongqing Song, Yong Li, Qi Zhang, Benbiao Song and Jiulong Wang
Heterogeneity of permeability is an important factor affecting the production of a carbonate reservoir. How to correctly characterize the heterogeneity of permeability has become a key issue for carbonate reservoir development. In this study, the reservo...
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Robert E. Keane
Fire regimes are ultimately controlled by wildland fuel dynamics over space and time; spatial distributions of fuel influence the size, spread, and intensity of individual fires, while the temporal distribution of fuel deposition influences fire?s freque...
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Michael Hewson, Hamish McGowan, Stuart Phinn, Steven Peckham and Georg Grell
The majority of studies assessing aerosol effects on rainfall use coarse spatial scale (1° latitude/longitude or more) and multi-seasonal or decadal data sets. Here, we present results from a spatial correlation of aerosol size distribution and rain rate...
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Adrian Linsel, Sebastian Wiesler, Joshua Haas, Kristian Bär and Matthias Hinderer
Heterogeneity-preserving property models of subsurface regions are commonly constructed by means of sequential simulations. Sequential Gaussian simulation (SGS) and direct sequential simulation (DSS) draw values from a local probability density function ...
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Wei-Chih Lin, Yu-Pin Lin, Yung-Chieh Wang, Tsun-Kuo Chang and Li-Chi Chiang
In this study, a deconvolution procedure was used to create a variogram of oral cancer (OC) rates. Based on the variogram, area-to-point (ATP) Poisson kriging and p-field simulation were used to downscale and simulate, respectively, the OC rate data for ...
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Waqas Ahmed, Khan Muhammad, Hylke Jan Glass, Snehamoy Chatterjee, Asif Khan and Abid Hussain
Geostatistical estimation methods rely on experimental variograms that are mostly erratic, leading to subjective model fitting and assuming normal distribution during conditional simulations. In contrast, Machine Learning Algorithms (MLA) are (1) free of...
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Paul H. Hiemstra,Edzer J. Pebesma,Chris J.W. Twenhöfel,Gerard B.M. Heuvelink
Pág. 58 - 72
It is important to detect and monitor the development of radioactive releases in the atmosphere. In many European countries monitoring networks have been established to perform this task. In the Netherlands the National Radioactivity Monitoring network (...
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Ivan Kovac, Marko ?rajbek, Nikolina Kli?anin and Gordon Gilja
The localization of pollution sources is one of the main tasks in environmental engineering. For this paper, models of spatial distribution of nitrate concentration in groundwater were created, and the point of highest concentration was determined. This ...
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