ارزیابی کمی و کیفی آبخوان چالدران با استفاده از برخی شاخص‌های کمی و هیدروژئوشیمیایی

Due to the climate changes and the increase in the use of groundwater, it is very necessary to study the quantitative and qualitative changes of these resources. In this study, the quantitative and qualitative status of Chaldaran aquifer was evaluated by using some quantitative and hydrogeochemical indices. According to the results, based on the dependence on groundwater index, the amount of dependence in this aquifer is very low. Meanwhile, the Aquifer Recovery Potential index showed a high potential, which indicates a more stable and better condition of the aquifer. Based on the Groundwater Development index, the condition of the Chaldaran aquifer was evaluated as suitable. The calculations made in relation to the damping and stability index also revealed the appropriate and stable situation for the Chaldaran aquifer, so that based on the damping index, this aquifer has the ability to supply water for various applications and is very stable interms of stability. According to Piper's diagram, Chaldaran aquifer isintherange of alkalis soil and weak acids, and the carbonate hardness of this aquifer is mostly above 50% and it is in magnesium and bicarbonate type. The increase in magnesium and TDS, especially in recent years, has led to a decline in the water quality of the Chaldaran aquifer, so that the potability of ground water in the area of this aquifer, according to the Schuler diagram, has decreased slightly and has reached the "acceptable" quality class. Permeability indices and Kelly index also evaluated the qualitative condition of Chaldaran aquifer as suitable.