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Paper Information

Journal:   IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING   WINTER 2009 , Volume 2 , Number 5; Page(s) 63 To 70.
 
Paper: 

INVESTIGATION OF INTERPOLATION METHODS TO DETERMINE SPATIAL DISTRIBUTION OF GROUNDWATER QUALITY IN RAFSANJAN

 
 
Author(s):  TAGHIZADEH MEHRJERDI R.A.*, ZAREEIAN JAHROMI M., MAHMOUDI SHAHLA, HEYDARI AHMAD, SARMADIAN F.
 
* UNIVERSITY COLLEGE OF AGRICULTURE & NATURAL RESOURCES, UNIVERSITY OF TEHRAN
 
Abstract: 

Groundwater is one of the major sources of exploitation in arid and semi-arid regions. Thus for protecting groundwater quality, spatial and temporal distribution of data are important. The objective of this research was to evaluate interpolation methods for predicting spatial distribution of some groundwater quality such as TDS, Na+, EC, SAR, Cl- and SO4-2. Data related to 65 wells in Rafsanjan plain were used and IDW, kriging and cokriging were studied. After normalization of data, variograme was drawn. For selecting suitable model for fitness on experimental variograme, less RSS value was used. By using crossvalidation and RMSE, the best method for interpolation was then selected. Results showed that for interpolation of groundwater quality, kriging and cokriging methods are superior to IDW method. At last, the maps of groundwater quality were prepared, using the best interpolation method in GIS environment.

 
Keyword(s): INTERPOLATION, SPATIAL DISTRIBUTION, GEOSTATISTICS, GROUNDWATER QUALITY AND CROSS-VALIDATION
 
References: 
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