کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8894964 1629896 2018 62 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Using solute and heat tracers for aquifer characterization in a strongly heterogeneous alluvial aquifer
ترجمه فارسی عنوان
با استفاده از ردیاب های حل و فصل و حرارت برای مشخصه آبخوری در یک آبخوان آبی بسیار
کلمات کلیدی
تست تکراری حرارتی و حلال، مدل سازی معکوس، شناسایی، مدل دامنه دوگانه،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
A test using Rhodamine WT and heat as tracers, conducted over a 78 day period in a strongly heterogeneous alluvial aquifer, was used to evaluate the utility of the combined observation dataset for aquifer characterization. A highly parameterized model was inverted, with concentration and temperature time-series as calibration targets. Groundwater heads recorded during the experiment were boundary dependent and were ignored during the inversion process. The inverted model produced a high resolution depiction of the hydraulic conductivity and porosity fields. Statistical properties of these fields are in very good agreement with estimates from previous studies at the site. Spatially distributed sensitivity analysis suggests that both solute and heat transport were most sensitive to the hydraulic conductivity and porosity fields and less sensitive to dispersivity and thermal distribution factor, with sensitivity to porosity greatly reducing outside the monitored area. The issues of model over-parameterization and non-uniqueness are addressed through identifiability analysis. Longitudinal dispersivity and thermal distribution factor are highly identifiable, however spatially distributed parameters are only identifiable near the injection point. Temperature related density effects became observable for both heat and solute, as the temperature anomaly increased above 12 degrees centigrade, and affected down gradient propagation. Finally we demonstrate that high frequency and spatially dense temperature data cannot inform a dual porosity model in the absence of frequent solute concentration measurements.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 558, March 2018, Pages 55-71
نویسندگان
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