[1]. Lucassen E. C. H. E. T, Smolders, A. J, van der Salm A. L, Roelofs J. G. M. High groundwater nitrate concentrations inhibit eutrophication of sulphate-rich freshwater wetlands. Biogeochemistry. 2004; (2): 249-267.
[2]. Ayotte J. D, Belaval M, Olson S. A, Burow K. R, Flanagan S. M, Hinkle S. R, Lindsey B. D. Factors affecting temporal variability of arsenic in groundwater used for drinking water supply in the United States. Science of the Total Environment. 2015; (505): 1370-1379.
[3]. Ghorbani K. Evaluation of the Empirical Bayesian Kriging method in ground water level zoning. Journal of water and soil conservation. 2018; 25(1): 165-182.
[4]. Goovaerts P. Geostatistical approaches for incorporating elevation into the spatial interpolation of rainfall. Journal of hydrology. 2000; (1-2): 113-129.
[5]. Einax J. W, Soldt U. Geostatistical and multivariate statistical methods for the assessment of polluted soils—merits and limitations. Chemometrics and Intelligent Laboratory Systems. 1999; (1): 79-91.
[6]. Hassani Pak A. geostatistics. 3. Tehran: University of Tehran; 2010. [Persian]
[7]. Nikbakht S, Delbari M. Estimation of Groundwater Levels using Geostatistical Methods. Journal of Water and Sustainable Development. 2014; 1(1): 49-56.
[8]. Shabani M. Evaluation of Geostatistical Methods in Preparing Groundwater Quality Maps and Their Zoning (Case Study: Neyriz Plain, Fars Province). Physical Geography Quarterly. 2011; (13): 83-96. [Persian]
[9]. Delbari M, Afrasiab P, Salari M. Mapping Water Salinity and Sodicity Using Selected Geostatistical Methods, Case Study: Kerman Plain. Journal of Water Resources Engineering. 2013; (16): 11-24. [Persian]
[10]. Valiallahi J. Evaluating groundwater level and water-quality variation in Oshnaveh–Naqadeh Plain, Urmia Lake basin, northwestern Iran. International Journal of Energy and Water Resources. 2020; 4(1): 27-35.
[11]. Al Kuisi M, Al-Qinna M, Margane A, Aljazzar T. Spatial assessment of salinity and nitrate pollution in Amman Zarqa Basin: a case study. Environmental Earth Sciences. 2009; (1): 117-129.
[12]. Arslan H. Spatial and temporal mapping of groundwater salinity using ordinary kriging and indicator kriging: The case of Bafra Plain, Turkey. Agricultural water management. 2012; 57-63.
[13]. Roshangar K, Mirheidarian Sh. Use of evolutionary method of gene expression programming in estimating scour of bridge piers in non-adhesive substrates based on laboratory and field data. 8th National Congress of Civil Engineering of Babol. 2014. [Persian]
[14]. Ghorbani H, Salehi A. Using gene expression programming to study changes in groundwater quality data with water level fluctuations in Isfahan Borkhar plain. 6th Semnan National Civil Engineering Congress. 2011. [Persian]
[15].Khashei-Siuki A, Sarbazi M. Evaluation of ANFIS, ANN, and geostatistical models to spatial distribution of groundwater quality (case study: Mashhad plain in Iran). Arabian Journal of Geosciences. 2015; 8(2): 903-912.
[16]. Yan X, Su X. Linear regression analysis: theory and computing. World Scientific. 2009.
[17]. Fan J, Gibels I. Local Polynomial Modelling and Its Applications, Chapman & Hall. Londan. Water Resources Bulletin. 1996; (87): 998-1004.
[18]. Abareshi F, Meftah Halghi M, Sanikhani H, Dehghani A.A. Comparison of three intelligence techniques for predicting water table depth fluctuations (Case study: Zarringol plain). Water and Soil Conservation. 2014; (1): 163-180. [Persian]
[19]. Nekooamal Kermani M, Mirabbasi R. Assessment of Interpolation Methods in Estimation of Groundwater Level (Case study: Sarkhon Plain). Hydrogeology. 2017; (2): 84-95. [Persian]
[20]. Yazdani Y, Vali A, Ghazavi R. Investigation of geostatistical methods in qualitative zoning of groundwater resources in Kashan plain. Geography and environmental planning. 2014; (3): 171-184. [Persian]
[21]. Hajihashemijazi M. R, Atashgahi M, Hamidian A. H. Spatial estimation of groundwater quality factors using geostatistical methods (case study: Golpayegan plain). Journal of Natural Environment. 2011; 63(4): 347-357.
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