کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4526915 1323865 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Residence time of bedform-driven hyporheic exchange
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Residence time of bedform-driven hyporheic exchange
چکیده انگلیسی

Biogeochemical and ecological transformations in hyporheic zones are dependent on the timing of hyporheic exchange. We show through linked modeling of open channel turbulent flow, groundwater flow, and solute transport that the residence time distributions of solutes advected by hyporheic flow induced by current–bedform interaction follow power-laws. This tailing behavior of solutes exiting the sediments is explained by the presence of multiple path lengths coupled with very large variability in Darcy flow velocity, both occurring without heterogeneity in sediment permeability. Hyporheic exchange through bedforms will result in short-time fractal scaling of stream water chemistry.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Water Resources - Volume 31, Issue 10, October 2008, Pages 1382–1386
نویسندگان
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