Volume 11, Issue 1 (Spring & Summer 2025)
KJES 2025, 11(1): 175-200 |
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tafazoli M, Bagheri R, Arjmand Sharif M, shojaei M. Hydrochemical tracing and salinity origin of water resources based on combined diagrams in the Sabzevar plain. KJES 2025; 11 (1) :175-200
URL: http://gnf.khu.ac.ir/article-1-2946-en.html
URL: http://gnf.khu.ac.ir/article-1-2946-en.html
1- Shahrood University of Technology
2- Shahrood University of Technology ,rahim.bagheri86@gmail.com
3- Regional Water Company of Khorasan Razavi
2- Shahrood University of Technology ,
3- Regional Water Company of Khorasan Razavi
Abstract: (213 Views)
The Sabzevar aquifer is one of the important groundwater resources in arid regions of the Khorasan Razavi Province. The different usages from this scarce resource, leads to a quantitative and qualitative crisis. The water level from 50 piezometric and physico-chemical properties of 25 groundwater samples were used to determine the hydrogeological setting and salinity origin of the aquifer. The iso-potential map shows that the groundwater flow directions are mainly from eastern to the western part of the area, which is closely aligned with surface flow direction. In general, the aquifer recharged mainly from the limestone heights of the northern parts of the area. The adjacent Ataeiyeh Plain in the eastern part is also an underground inflow to the aquifer. An ephemeral saline river also flows from the east to the west part of the area. Electrical conductivity varies between 627 µs/cm in the recharge areas in the north of the aquifer to 11,600 µs/cm in the middle part of the aquifer. Groundwater samples are classified based on the electrical conductivity into three groups: freshwater with an electrical conductivity of less than 1000 µs/cm and the sodium bicarbonate type in the north of the aquifer, brackish waters with 1000<EC< 4000 and the sodium chloride type in the south of the aquifer, and saline waters with EC > 4000 µs/cm and the sodium chloride type in the middle part of the aquifer. The water samples are saturated with calcite and dolomite and under-saturated with gypsum and halite. The salinity of the groundwater in the region is dependent on dissolution of evaporative formations in the region. Therefore, the infiltration of fresh water from the northern parts and some extent from the southern part, along with the infiltration of saline water from the eastern parts and the adjacent aquifer, are the main factors controlling the quality of the groundwater of the plain, along with ion exchange and mixing processes.
Type of Study: Original Research |
Subject:
Hydrogeology
Received: 2025/06/30 | Accepted: 2025/08/30 | Published: 2025/08/25
Received: 2025/06/30 | Accepted: 2025/08/30 | Published: 2025/08/25
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