Investigating the effect of qualitative and quantitative parameters on ground water in Arnan-Dehj watershed

Authors
Seyed Masoud Soleimanpour 1
M. Naeimi 2
S. Lotfinasab 3
S. Zandifar 2
O. Rahmati 4
معتمدنیا motamednia 5
1 Associate Professor, Soil Conservation and Watershed Management Research Department, Fars Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran
2 Assistant Professor, Desert Research Department, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.
3 .Assistant Professor, Desert Research Department, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.
4 Assistant Professor, Soil Conservation and Watershed Management Research Department, Kurdistan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Sanandaj, Iran.
5 Ph.D., Natural Resources and Watershed Management Department, Bafgh County, Yazd Province, Iran.
10.22034/wmji.2024.2036550.1079
Abstract
The falling groundwater level and deteriorating quality pose significant environmental risks. Since groundwater quality is influenced by its quantity, adjusting water quality parameters is essential based on groundwater table depth. This study aims to monitor the quantitative and qualitative changes of groundwater sources in the Arnan-Dehj watershed. The Arnan-Dehj watershed, located on the northern border of Kerman and Yazd provinces, was selected for this study. Data on groundwater from deep wells, fountains, and aqueducts over a 10-year period (2008-2018) were obtained from the Iran Water Resources Research Organization (Tamab) and the Regional Water Organization of Kerman and Yazd provinces. Correlation coefficients between qualitative parameters (salinity, sodium absorption ratio (SAR), total dissolved solids (TDS)) and quantitative parameters of groundwater were calculated using SPSS software. The study found that salinity in the aquifer water decreased by 29.39 µS/cm from the start of the period until 2016-2017, after which salinity increased. A decrease in groundwater salinity corresponded with a 1.81 m drop in the water table level. The SAR showed a decreasing trend, indicating that lower SAR values correlated with declining water levels. Conversely, TDS values increased over the period, inversely related to the water table changes. The correlation coefficients for salinity, SAR, and TDS with groundwater levels were -0.43, -0.24, and -0.43, respectively, indicating that as groundwater levels dropped, salinity, SAR, and TDS values increased.
Keywords
Aquifer
Electrical conductivity
Level surface
Subsidence
Trend
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