مقایسه‌ی عملکرد روش‌های درون‌یابی برای ارزیابی کیفی آب‌زیرزمینی بر مبنای خصوصیات آبخوان‌های کم‌عمق (مطالعه موردی: آبخوان بابل_آمل)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی عمران آب،دانشکده عمران، معماری و هنر، دانشگاه آزاد اسلامی واحد علوم و تحقیقات،تهران، ایران.

2 گروه مهندسی آبیاری و آبادانی، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران، تهران، ایران.

چکیده

برنامه­ریزی مدیریت کیفی سفره­های آب­زیرزمینی براساس تغییرات مکانی پارامتر موثر در آلودگی آب­های زیرزمینی صورت می­گیرد. در این مقاله روش­های مختلف درون­یابی در آبخوان کم­عمق بابل_آمل با توجه به خصوصیات هیدروژئولوژیکی آن مورد ارزیابی قرار می گیرند. پس از پردازش اولیه اطلاعات جهت انتخاب روش درون­یابی مناسب، 21 روش­ درون­یابی قطعی و زمین­آمار با عملکرد خطی و غیرخطی اعم از روش عکس  فاصله (IDW)، کریجینگ معمولی (OK)، کریجینگ معمولی لوگ نرمال (Log_OK)، کریجینگ گسسته (DK)، کریجینگ تجربی بیزی (EBK)، همسایگی طبیعی (NN)، سطح روند (TS) و اسپلاین (Spline) مورد مقایسه قرار گرفتند. پارامتر کل جامدات محلول (TDS) در آبخوان کم­عمق ساحلی بابل_آمل در مجاورت دریای خزر در شمال ایران دراین تحقیق بکار گرفته شد. برای صحت­سنجی نتایج از 7 معیار ارزیابی خطا در اعتباریابی حذفی تمامی چاه­های مشاهداتی غلظت استفاده گردید. نتایج نشان داده است که روش غیرخطی Log_OK در آبخوان کم­عمق بابل_آمل در 43/71 درصد موارد معیارهای ارزیابی خطا، نتایج بهتری ارائه داده است. بنابراین می­توان نتیجه گرفت که روش غیرخطی Log_OK کارایی مناسبی در آبخوان­های کم­عمق  بر مبنای خصوصیات هیدروژئولوژیکی آن­ها دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Comparison of Interpolation Methods for Groundwater Quality Assessment Based on Hydrogeological Characteristics of Shallow Aquifers (Case Study: Babol-Amol Aquifer)

نویسندگان [English]

  • Seyedeh Mona Tabandeh 1
  • Majid Kholghi 2
  • Seyed abbas Hosseini 1
1 Department of Civil Engineering, Faculty of Civil Engineering, Architecture and Art, Science and Research Branch, Islamic Azad University, Tehran, Iran.
2 Department of Irrigation and Reclamation Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran.
چکیده [English]

Groundwater quality management planning is based on spatial distribution of the effective parameter in aquifer pollution. In this study, different interpolation methods in Babol-Amol shallow aquifer were evaluated according to its hydrogeological characteristics. After initial data processing, 21 deterministic and geostatistical interpolation methods with linear and nonlinear relationships including inverse distance weighted (IDW), ordinary kriging (OK), lognormal ordinary kriging (Log_OK), disjunctive kriging (DK), empirical Bayesian kriging (EBK), natural neighbor (NN), trend surface (TS) and Spline were compared in order to select the most suitable interpolation method. The total dissolved solids (TDS) parameter was used in Babol-Amol coastal shallow aquifer near the Caspian Sea in north of Iran. The seven error criteria were used for verification in cross-validation of all sampling wells. The results indicated that the nonlinear Log_OK method produced better results in Babol-Amol aquifer with 71.43 percentage of error criteria. Therefore, it can be concluded that the non-linear Log_OK method had promising performance in shallow aquifers based on their hydrogeologicalcharacteristics.

کلیدواژه‌ها [English]

  • Groundwater Contamination
  • TDS Parameter
  • Shallow Aquifer
  • Linear and Nonlinear Spatial Interpolation
  • Aquifer Characteristics
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