Alves, J. P. H. A., Fonseca, L. C., Chielle, R. S. A. and Macedo, L. C. B. (2018). Monitoring water quality of the Sergipe River basin: an evaluation using multivariate data analysis. Revista Brasileire de Recursos Hidricos Brazilian. J. Water Resour., 23, 1-12.
Asgari, M. S. (2011). Hydrochemical study of Birjand aquifer.M.Sc., Faculty of Engineering, Department of Mining Engineering, Birjand University [In Persian].
Asgharimoghaddam, A. and Adigozalpour, A. (2016). Investigation of Aluminum, Iron, Manganese, Chromium and Cadmium Concentrations in Groundwater of Oshnavieh Plain. Iran. J. Ecohydro., 3, 167-179 [In Persian].
Babaeihessar, S., Hamdami, Q. and Ghasemieh, H. (2016). Identify the Effective Wells in Determination of Groundwater Depth in Urmia Plain Using Principle Component Analysis. J. Water. Soil., 31, 10-50 [In Persian].
Bazrafshan, J. and Hejabi, S. (2017). Drought Monitoring Methods. University of Tehran Press [In Persian].
Gurunathan, K. and Ravichandran, S. (1994). Analysis of water quality data using a multivariate statistical technique- a case study. IAHS Pub, 219pp.
Farpoor, F., Ramezani, Y. and Akbarpour, A. (2019). Numerical Simulation of Chromium Changes Trend in Aquifer of Birjand plain. Iran. J. Irrig. Drain., 12(5), 1203-1216 [In Persian].
Hooshangi, N., Aleshaikh, A. A. and Nadiri, A. A. (2015). Optimization of Piezometers Number for Groundwater Level Prediction Using PCA and Geostatistical Methods. Water. Soil. Sci., 25, 53-66.
Hu, S., Luo, T. and Jing, C. (2013). Principal component analysis of fluoride geochemistry of groundwater in Shanxi and Inner Mongolia, China. J. Geo. Explor., 135, 124-129.
Ishtiyaq, N., Anisa, K. and Abdul, H. (2017). Evaluation of seasonal variability in surface water quality of Shallow Valley Lake, Kashmir, India, using multivariate statistical techniques. Pollu., 3, 349-362.
Jafarzadeh, A. and Khasheisiuki, A. (2018). Performance examination of optimization model of groundwater monitoring network based on Gray wolf and Neural network (GNM) (Case study: Birjand plain). J. Irrig. Water. Engin., 8, 121-139.
Kavusi, M., Khasheisiuki, A. and Dastourani, M. (2020). Optimal Design of Groundwater Monitoring Network Using the Combined Election-Kriging Method. Springer;European Water. Res. Asso. (EWRA), 34, 2503- 2516.
Kavusi, M., Khasheisiuki, A., Porrezabilondi, M. and Najafi, M. H. (2019). Application of New LSSVM-PSO Optimization-Simulation Model in Designing Optimal Groundwater Level Network Monitoring. Iran. J. Ecohydro., 5, 1306-1319.
Khodaverdi, M., Hashemi, S. R., Khasheisiuki, A. and Porrezabilondi, M. (2020). Optimal Design of Groundwater-Quality Sampling Networks with MOPSO-GS (Case Study: Neyshabour Plain). J. Water. Irrig. Manag. (J. Agric.), 9, 199-210 [In Persian].
Markus, M., Knapp, H. V. and Tasker, G. D. (2003). Entropy and generalized least square methods in assessment of the regional value of stream gages. J. Hydro., 283: 107-121.
Mohammadzadeh, H. and Heydarizad, M. ()2011. Hydrochemical and stable isotopes study (O18 and H2 surface and groundwater resources) Andarkh Karstic region (north of Mashhad). Earth. Sci. Res., 2, 59-69 [In Persian].
Mogheir, Y. and Singh, V. P. (2003). Specification of information needs for groundwater management planning in developing country. Groundwater Hydrology, Balema Publisher, Tokyo, 2, 3-20.
Mogheir, Y., De Lima, J. L. M. P. and Singh, V. P. (2004). Characterizing the spatial variability of groundwater quality using the entropy theory: I. Synthetic data. Hydro. Pro., 18(11), 2165-2179.
Noori, R., Abdoli, M. A., Ameri Ghasrodashti, A. and Jalili Ghazizade, M. (2009). Prediction of municipal solid waste generation with combination of support vector machine and principal component analysis: A case study of Mashhad. Enviro. Pro. Sust. Ener., 28, 249-258 [In Persian].
Noorighidari, M. H. (2013). Determintion of Effective Wells to Monitor the Ground Water Level Using the Principal Components Analysis. J. Sci. Techno. Agri. Nat. Resour., 17, 149-159 [In Persian].
Ouyang, Y. (2005). Evaluation of river water quality monitoringstations by principal component analysis. Water. Res., 39, 2621-2635.
Petersen, W. (2001). Process identification by principal component analysis of river water-quality data. Eco. Model., 138.
Rahnama, S. and Sayari, N. (2019). Survey and Trends of Chemical Water Quality Parameters of Tajan River Water Quality Using Principal Component Analysis and Aqua Chem Software. Human. Enviro., 48, 13-25 [In Persian].
Rajaei, Q., Hasanpour, M. and Mehdinejad, M. H. (2012). Heavy Metals Concentration (Zinc, Lead, Chrome and Cadmium) in Water and Sediments of Gorgan Gulf and Estuarine Gorganroud River, Iran. Health. Sys. Res., 8, 748-756 [In Persian].
Rezaei, E., Khasheisuki, A. and Shahidi, A. (2015). Design of Groundwater Level Monitoring Network, Using the Model of Least Squares Support Vector Machine (LS-SVM). Iran. J. Soil. Water. Res., 45, 389-396 [In Persian].
Sanchez- Martos, F., Jimenez- Espinosa, R. and Pulido- Bosch, A. (2001). Mapping groundwater quality variables using PCA and geostatistics: a case study of Bajo Andarax, southeastern Spain. Hydro. Sci. J., 46, 227- 242.
Shahriyari, A., Goleirozy, K. and NOSHIN, S. (2010). Muscular concentration of cadmium and lead in carp, mullet and kutum of the Gorgan Bay, Caspian Sea. Iran. Fish. Sci. Rese. Inst., 19, 95-100 [In Persian].
Shahryari, T., Moashery, B. and Sharifzadeh, G. (2011). Concentrations of chromium and copper in the ground water and drinking water distribution network of Birjand, 2009-2010. J. Birjand Univ Med Sci., 18 (1): 62-67 [In Persian].
Shannon, C. E. (1948). A mathematical theory of communication, Bell. Sys. Tech. J., 27:379-423.
Zhao, Y., Xia, X. H., Yang, Z. F. and Wang, F. (2012). Assessment of water quality in Baiyangdian Lake using multivariate statistical techniques. Proc. Enviro. Sci., 13, 1213-1226.