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Evaluating morphology-driven hyporhe...

Fanelli, Rosemary M.

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Evaluating morphology-driven hyporheic exchange and subsurface biogeochemical cycling in a semi-arid stream.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Evaluating morphology-driven hyporheic exchange and subsurface biogeochemical cycling in a semi-arid stream./
Author:	Fanelli, Rosemary M.
Description:	82 p.
Notes:	Adviser: Laura Lautz.
Contained By:	Masters Abstracts International45-05.
Subject:	Biogeochemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1442461

Evaluating morphology-driven hyporheic exchange and subsurface biogeochemical cycling in a semi-arid stream.
Fanelli, Rosemary M.

Evaluating morphology-driven hyporheic exchange and subsurface biogeochemical cycling in a semi-arid stream. - 82 p.

Adviser: Laura Lautz.

Thesis (M.S.)--State University of New York College of Environmental Science and Forestry, 2007.

Keywords. Hyporheic exchange; in-stream obstructions; temperature; biogeochemistrySubjects--Topical Terms:

545717
Biogeochemistry.

Evaluating morphology-driven hyporheic exchange and subsurface biogeochemical cycling in a semi-arid stream.
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008 110512s2007 ||||||||||||||||| ||eng d
035 $a (UMI)AAI1442461
035 $a AAI1442461
040 $a UMI $c UMI
100 1 $a Fanelli, Rosemary M. $3 1263149
245 1 0 $a Evaluating morphology-driven hyporheic exchange and subsurface biogeochemical cycling in a semi-arid stream.
300 $a 82 p.
500 $a Adviser: Laura Lautz.
500 $a Source: Masters Abstracts International, Volume: 45-05, page: 2434.
502 $a Thesis (M.S.)--State University of New York College of Environmental Science and Forestry, 2007.
520 $a Keywords. Hyporheic exchange; in-stream obstructions; temperature; biogeochemistry
520 $a Hyporheic exchange, enhanced by complex streambed morphology, can influence the type and rate of biogeochemical cycling in the subsurface. These processes chemically alter water passing temporarily through the subsurface, which eventually returns to the surface channel. I instrumented two 20 m long reaches, each containing a small log dam, with in-stream minipiezometers and temperature data loggers to simultaneously observe pore water geochemistry and streambed temperature dynamics in order to assess the degree of biogeochemical cycling induced by the log dams. Upstream of the dams, low permeability sediments supported enhanced hyporheic anaerobic cycling. Downstream of the dams, the subsurface was oxygen-rich and supported nitrification. Groundwater upwelling was observed further downstream at the bottom of the riffle. Assessing types and rates of subsurface biogeochemical cycling may be facilitated by coupling streambed temperature measurements with hyporheic water geochemistry, and can aid in understanding how hyporheic exchange contributes to overall stream biogeochemistry.
590 $a School code: 0213.
650 4 $a Biogeochemistry. $3 545717
650 4 $a Geochemistry. $3 539092
650 4 $a Hydrology. $3 545716
690 $a 0388
690 $a 0425
690 $a 0996
710 2 $a State University of New York College of Environmental Science and Forestry. $3 1017822
773 0 $t Masters Abstracts International $g 45-05.
790 $a 0213
790 1 0 $a Lautz, Laura, $e advisor
791 $a M.S.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1442461