Assessing Spatial Variability of Groundwater Quality for Drinking and Agricultural Purposes Through Geostatistics and GIS in Mazandaran Plain

Arbabi, Somayeh (2016) Assessing Spatial Variability of Groundwater Quality for Drinking and Agricultural Purposes Through Geostatistics and GIS in Mazandaran Plain. Masters thesis, University of Zabol.

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We want to examin Mazandaran plain underground water quality from about 300 wells for drinking and agriculture by statistic and geostatisc methods and using geographical information system (GIS) by considering the importance of underground water in Mazandaran plain and its high pollution potency, for many reasons such as Khazar sea, high level of underground water and the probability of pollution due to polluted water and waste water. Water physicochemical properties contains ،EC ،SAR ،Na+ ،K+ ،Mg2+ ،Ca2+ ،%Na ،SO4 2- ،Cl- ،HCO3 - ،CO3 2- ،TDS ،TH و NO3 - and Sodium carbonate residue indexes (RSC), Sodium solution percentage (SSP), potential salting (PS), Chloride index, Penetration index (PI), Kelli indexes (KI), Mg absorption rate (MAR) and ionic equilibrium fault percentage (E). Water quality data statistics analysis Done by calculating descriptive statistics, correlation test, principal component analysis and cluster analysis. Water sample usefulness for drinking and agriculture and water hydrochemical facies done on the basis of standard methods by Schoeller , Wilcox and piper diagrams. In this research water quality properties location changing and selfcorrelation degree in Mazandaran plain examined by using simivariogram and local variance pattern the mentioned properties is determined by using suitable geostatistic methods (like ordinary kriging, universal kriging and cokriging) in GIS. Interpolation result evaluation is performed on the basis of statistics indexes like root mean squares errors (RMSE) and mean error deviation (MBE). Based on the results of this study showed groundwater for drinking Mazandaran general doesn range of hardness, sodium, chloride and sulfate no problem but in terms of total dissolved solids stream Qaymshhrjuibar, Sari -Neka ،bandareGaz- Bhshhr areas wells and water quality for drinking purposes is inappropriate and unpleasant. Based on Wilcox diagram, water of Ramsar - Chalus ،Noshahr – noor areas almost perfect for climbing plants and the rest of the wells with salty water quality is so bad there as well. Based on the Piper diagram water hydrochemical facies in the study area except Nushhr- noor and Babol - Amol is the type of calcium bicarbonate, magnesium bicarbonate . The results of geostatistical analysis showed that with the exception of PI and pH data that has poor spatial correlation rest of the variables are moderate to strong spatial correlation and more simivariogram are spherical and exponential models. Cross-validation results also showed that ordinary kriging and cokriging interpolation methods for qualitative variables groundwater are the best.

Item Type: Thesis (Masters)
Uncontrolled Keywords: groundwater, hydrochemical indexes, Schollar diagram, Wilcox diagram, piper diagram, spatial variability, geostatistics
Subjects: S Agriculture > S Agriculture (General)
Depositing User: admin admin1 admin2
Date Deposited: 06 May 2017 05:54
Last Modified: 06 May 2017 05:54

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