کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4978343 1452265 2016 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Identifying geochemical hot moments and their controls on a contaminated river floodplain system using wavelet and entropy approaches
ترجمه فارسی عنوان
شناسایی لحظات داغ ژئوشیمیایی و کنترل آنها بر روی یک سیستم سواحل رودخانه آلوده با استفاده از رویکردهای موجک و آنتروپی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزار
چکیده انگلیسی
Geochemical hot moments are defined here as short periods of time that are associated with disproportionally high levels of concentrations (biogeochemically-driven or transport-related) relative to longer intervening time periods. We used entropy and wavelet techniques to identify temporal variability in geochemical constituents and their controls along three transects within a contaminated floodplain system near Rifle CO. Results indicated that transport-dominated hot moments drove overall geochemical processing in the contaminated groundwater and seep zones. These hot moments were associated with seasonal hydrologic variability (∼4 months) in the contaminated aquifer and with annual hydrologic cycle and residence times in the seep zone. Hot moments associated with a naturally reduced zone within the aquifer were found to be biogeochemically-driven, with a different dominant frequency (∼3 months) and no correlation to hydrologic or weather variations, in contrast to what is observed in other regions of the floodplain.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Modelling & Software - Volume 85, November 2016, Pages 27-41
نویسندگان
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