The assessment of groundwater geochemistry of some wells in Rafsanjan plain, Iran

Year 2016, Volume: 5 Issue: 3, 221 - 230, 20.06.2016

Milad Mirzaei Aminiyan Farzad Mirzaei Aminiyan Amin Heydariyan Mahmood Reza Sadikhani

https://doi.org/10.18393/ejss.2016.3.221-230

Cited By: 4

Abstract

Water quality is the critical factor that influence on human health and quantity and quality of grain production in semi-humid and semi-arid area. Groundwater and irrigation water quality play important roles in main production this crop. For this purpose, 94 well water samples were taken from 25 wells and samples analyzed. The results showed that four main types of water were found: Na-Cl, K-Cl, Na-SO_4, and K-SO₄. It seems that most wells in terms of water quality (salinity and alkalinity) and based on Wilcox diagram have critical status. The analysis suggested that more than 87% of the well water samples have high values of EC that these values are higher than into critical limit EC value for irrigation water, which may be due to the sandy soils in this area. Most groundwater were relatively unsuitable for irrigation but it could be used by application of correct management such as removing and reducing the ion concentrations of Cl^‾, SO₄^2‾, Na⁺ and total hardness in groundwater and also the concentrated deep groundwater was required treatment to reduce the salinity and sodium hazard. Given that irrigation water quality in this area was relatively unsuitable for most agriculture production but pistachio tree was adapted to this area conditions. The integrated management of groundwater for irrigation is the way to solve water quality issues not only in Rafsanjan area, but also in other arid and semi-arid areas.

Keywords

Irrigation, saline, water quality, groundwater, Rafsanjan

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