Assessment of Groundwater Chemical Quality, Using Inverse Distance Weighted Method

Journal of Chemical Health Risks

卷:3

Sh. Ashraf¹  H. Afshari² 

[1] 1Department of Soil Science, Damghan Branch, Islamic Azad University, Damghan, Iran;

[2] Departments of Horticulture, Damghan Branch, Islamic Azad University, Damghan, Iran;

关键词: GIS;    Spatial analysis;    Water Quality;    IDW;   

DOI  :  

来源: DOAJ

【 摘 要 】

An interpolation technique, ordinary Inverse Distance Weighted (IDW), was used to obtain the spatial distribution of groundwater quality parameters in Damghan plain of Iran. According to Scofield guidelines for TDS value, 60% of the water samples were harmful for irrigation purposes. Regarding to EC parameter, more than 60% of studied area was laid in bad range for irrigation purposes. The most dominant anion was Cl- and 10% of water samples showed a very hazardous class. According toDoneenguidelines forchloride value, 100%ofcollectedwaterfrom theaquiferhadslight to moderate problemsforirrigation water purposes. The predominant cations in Damghan plain aquifer were according to Na+> Ca++> Mg++> K+. Sodium ion was the dominant cation and regarding to Na+ content guidelines, almost all groundwater samples had problem for foliar application. Calcium ion distribution was within usual range. The magnesium ion concentration is generally lower than sodium and calcium. The majority of the samples showed Mg++amount within usual range. Also K+ value ranged from 0.1 to 0.23 meq/L and all the water samples had potassium values within the permissible limit. Based on SAR criterion 80 % of collected water had slight to moderate problems. The SSP values were found from 2.87 to 6.87%. According to SAR value, thirty percent of ground water samples were doubtful class. The estimated amounts of RSC were ranged from 0.4-2 and based on RSC criterion, twenty percent of groundwater samples had slight to moderate problems.

【 授权许可】

Unknown