Evaluation of the Empirical Bayesian Kriging method in ground water level zoning

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FARNIA E.; GHORBANI KH.; SALARIJAZI M.

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Journal: Journal of Water and Soil Conservation Year:2018 | Volume:25 | Issue:1 Page(s): 165-182

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Title

Evaluation of the Empirical Bayesian Kriging method in ground water level zoning

Author(s)

FARNIA E. | GHORBANI KH. | SALARIJAZI M. | Issue Writer Certificate

Keywords

KrigingQ1

Empirical Bayesian KrigingQ1

GroundwaterQ2

GolestanQ2

Geo-StatisticsQ2

InterpolationQ2

Abstract

Background and Objectives: Groundwater as one of the valuable water resources that has always been of interest to researchers. Preparing an interpolated water level zoning map is one of fields that can be acquired via best Interpolation methods among different available methods. The Kriging method, based on semi variogram analysis, is one of traditional geostatistical methods. Interpolation precision is depended on the suitable selection of variogram. Empirical Bayesian Kriging (EBK) method is developed to estimated semi variogram parameters during simulation process. The objective of this study is investigation of EBK to increase the precision of Groundwater level Interpolation zoning. For this purpose, the results of this study were compared with the results of other other deterministic Interpolation method including inverse distance weighted, radial basis function and local and global polynomial functions. Materials and Methods: This study was carried out based on the annual mean Groundwater level of 57 deep well in Ghareh-Sou aquifer located in Golestan province during 2005-2016 period. In order to Groundwater level zoning, different deterministic and geostatistical Interpolation methods were evaluated using cross validation technique. The best semi variogram selected for Kriging and EBK methods and finally the model with minimum error was determined and mapped. Results: The results of cross validation in study area showed that among deterministic method, degree two local polynomial method has higher accuracy and even less error in comparison with Kriging method. The EBK methods, with simulation of fitness of suitable variogram on Groundwater level data, led to decrease in Kriging error (23 to 16 meter) and had close precision to local polynomial method. Conclusion: Although the error of the maps prepared based on EBK and local polynomial methods have no significant differences, there are considerable discrepancies between these maps. The EBK basis map shows smoother spectrum of Groundwater level changes and the drawn pattern with this method is also proportional to general slope of study area.

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APA: Copy

FARNIA, E., GHORBANI, KH., & SALARIJAZI, M.. (2018). Evaluation of the Empirical Bayesian Kriging method in ground water level zoning. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 25(1 ), 165-182. SID. https://sid.ir/paper/156373/en

Vancouver: Copy

FARNIA E., GHORBANI KH., SALARIJAZI M.. Evaluation of the Empirical Bayesian Kriging method in ground water level zoning. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2018;25(1 ):165-182. Available from: https://sid.ir/paper/156373/en

IEEE: Copy

E. FARNIA, KH. GHORBANI, and M. SALARIJAZI, “Evaluation of the Empirical Bayesian Kriging method in ground water level zoning,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 25, no. 1 , pp. 165–182, 2018, [Online]. Available: https://sid.ir/paper/156373/en

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