ارزیابی هیدروژئوشیمی و کیفیت آبخوان آبرفتی دشت گور استان بوشهر

نویسندگان

1 دانشیار گروه زمین‌شناسی، دانشگاه آزاد اسلامی، واحد استهبان، استهبان، ایران

2 کارشناس‌ارشد منابع آب، سازمان آب منطقه‌ای استان بوشهر، بوشهر، ایران

چکیده

دشت گور در شمال­شرق استان بوشهر و در محدوده مطالعاتی دالکی- شبانکاره قرار دارد. در گذشته این دشت دارای پتانسیل مناسبی به لحاظ کمی و کیفی بشمار می­رفته و هم‌اکنون با داشتن 303 حلقه چاه غیرمجاز کشاورزی یکی از دشت‌های ممنوعه و بحرانی بشمار می‌رود. از طریق شبکه پایش انتخابی آبخوان با 26 حلقه چاه بهره‌برداری و آنالیز نمونه‌های آب زیرزمینی در بازه زمانی 9 ساله (1388-1397) ویژگی‌های هیدروژئوشیمی آبخوان دشت گور مورد تجزیه‌وتحلیل قرار گرفت. نتایج تجزیه و تحلیل دیاگرام‌های هیدروژئوشیمیایی و نقشه‌ها در محیط آرک جی ای اس نشان داد که در آبخوان مورد مطالعه آنیون غالب سولفات و کاتیون غالب کلسیم است. کل مواد محلول جامد طی دوره 9 ساله به مقدار 355 میلی‌گرم افزایش یافته است. آب‌ها عمدتاً از نوع سولفات کلسیک و شوری به میزان 1221 واحد با متوسط سالانه 136 میکروزیمنس بر سانتی­متر سیر صعودی داشته است. عامل اثرگذار و کنترل کیفیت آب وجود سازندهای آغاجاری و کنگلومرای بختیاری است.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of hydrogeochemistry and quality of alluvial aquifer in Dasht Goor plain of Bushehr province

نویسندگان [English]

  • R. Mirzaee Mahmoodabadi 1
  • O. Azadijoo 2
1 Assoc. Prof., Dept., of Geology, Islamic Azad University, Estahban Branch, Estahban, Iran
2 Senior expert in water resources, Bushehr province regional water organization, Bushehr, Iran
چکیده [English]

Dasht Gour is located in the northeast of Bushehr province and the study area of ​​Dalki-Shabankare. In the past, this plain had good potential in quantity and quality, and now, with 303 unauthorized agricultural wells, it is considered one of the prohibited and critical plains. Through the selective monitoring network with 26 exploitation wells and the analysis of underground water samples in a period of 9 years (1388-1397), the hydrogeochemical characteristics of the Dasht Gour aquifer were analyzed. The analysis of hydrogeochemical diagrams and maps in the Arc GIS environment showed that in the studied aquifer, the dominant anion is sulfate, and the dominant cation is calcium. Total dissolved solids have increased to 355 mg during the nine years. The waters are mainly calcium sulfate, and salinity has increased by 1221 units with an annual average of 136 microsiemens/cm. The influencing factor and water quality control is the presence of the Aghajari formations and Bakhtiari conglomerate.

کلیدواژه‌ها [English]

  • Aquifer
  • Underground Water Quality
  • Dasht Goor
  • Bushehr

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  • تاریخ دریافت: 25 شهریور 1402
  • تاریخ بازنگری: 15 مهر 1402
  • تاریخ پذیرش: 26 مهر 1402

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