| Authors | Abdorreza Vaezihir- Mehri Tabarmayeh- Tahereh Mohammadzadeh |
|---|---|
| Journal | Science of soil and water |
| Paper Type | Full Paper |
| Published At | ۲۰۲۲-۰۹-۲۷ |
| Journal Grade | Scientific - research |
| Journal Type | Typographic |
| Journal Country | Iran, Islamic Republic Of |
Abstract
Sandstone and igneous units have formed fractured rocks aquifers in Almaneh basin at south-west of Marivan city in western Iran. The aim of this research is to evaluate groundwater from quality and quantity viewpoints. Fractured rock and alluvial deposition have occupied 80.2% and 19.8% of the study area, respectively. After determination of fractured aquifers, relationship between fracture density and streams pattern were investigated. About 76% of total discharge of the springs is draining from fractured rocks and the highest value of mean discharge belongs to gabbro and diorite rocks and the lower value is for alluvial aquifers (with a value of 0.5 and 0.8 L s-1, respectively). Specific discharge of the ultrabasic rocks was estimated as 2.28 L s-1 km-2 as the richest aquifer of the area and gabbro to dioritic rocks with 0.86 L s-1 km-2 value is the poor units from water resources viewpoint. In the northeast and southwest parts of the area, the fracture density is high that coincide with the location of the springs showing the role of tectonics at aquifers recharge. In order to evaluate the hydrochemical characteristics of groundwater, some samples were collected and analyzed. It was revealed that the type of waters is chloric and sodic-magnesitic with an ascending trend of EC, Na and Cl concentration from east to west. GQI index values varies from 90 to 92 means that the water quality is located at the excellent range confirming the results of Scholler diagram.