The effective factors on the groundwater quality in the Saravan area, south Iran

Articles in Press

Document Type : Original Article

Authors

1 Geology Department, Faculty of Science, University of Sistan and Baluchestan, Iran

2 Geology Department, Faculty of Science, University of Sistan and Baluchestan, Iran,

3 Sistan and Baluchestan Water and Wastwater Co., Iran

10.22125/iwe.2024.434517.1780

Abstract

This research has studied the hydrochemistry and quality of groundwater resources in Saravan area. According to the hydrograph of the water table, ground water level (from 2014 to 2019) has decreased (-7.88 m). The delay time between rainfall and water table is about one or two months, which indicates relatively good permeability in the alluvial aquifer. According to the EC map, the quality of groundwater has decreased from west to east, and the groundwater of qanat’s has better quality than the exploitation wells. Because the well's mother of the qanats is dug in the upstream part of the aquifer and inside the alluvial fan, which has better quality ground water, Also the drainage system of the qanats is in such a way that only the over flow of ground water comes out. In the groundwater of the studied areas, there are three types of water: NaCl, NaSO4 and NaCl (HCO3). In general, there is an increase in chloride and sodium from qanat water resources to wells in the studied area. Also, increasing the depth of the well has increased the percentage of chloride and sodium. According to the distribution map of discharge of wells, groundwater extraction in the west area is more than the east region. Based on the factor analysis, two main factors affecting the quality of the aquifers have been identified, the first factor is the dissolution of minerals, which controls the quality of water sources and the second factor is the factors controlling the acidity/alkalinity.

Keywords

Main Subjects

Irrigation and Water Engineering

Articles in Press, Accepted Manuscript
Available Online from 10 March 2024

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