* Corresponding Author
THE CHANGES IN STREAM WATER TEMPERATURE AND WATER QUALITY PARAMETERS DURING RAINFALL EVENTS IN FORESTED WATERSHEDS: SCALING OF OBSERVATIONS
https://doi.org/10.22146/ijg.2289 Luki Subehi(1*), Takehiko Fukushima(2), Yuichi Onda(3), Shigeru Mizugald(4)
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(*) Corresponding Author
Abstract
We studied the changes in stream water temperature (Tw) and water
quality (Wq) during rainfall events in forested watersheds. The parameters ofWq
(88, DOC, N03--N, DTN, Na+, 8i and r) were observedinfour regionsof Japan
from June 2004 to December 2005. The R values between Tw and those Wq
parameters and between specific discharge (Qs) and Wq were positive, exceptfor
the negativeones (Na+ and Si). Similarto the relationbetweenQs vs. Tw, hysteretic
loops in the relations between Qs vs. those Wqparameters were clockwise,
exceptfor Na+ and Si as counter-clockwiseloops. This indicatesthat the'surface
and subsurface flows contain higher concentrations of SS, DOC, IC, N03--N and
DTN. To the contrary,the deeperpathwayscontainhigherconcentrationsof Na+
and Si. These results suggest that the changes in Tw and Wq could be used to
interpret theflow paths.
quality (Wq) during rainfall events in forested watersheds. The parameters ofWq
(88, DOC, N03--N, DTN, Na+, 8i and r) were observedinfour regionsof Japan
from June 2004 to December 2005. The R values between Tw and those Wq
parameters and between specific discharge (Qs) and Wq were positive, exceptfor
the negativeones (Na+ and Si). Similarto the relationbetweenQs vs. Tw, hysteretic
loops in the relations between Qs vs. those Wqparameters were clockwise,
exceptfor Na+ and Si as counter-clockwiseloops. This indicatesthat the'surface
and subsurface flows contain higher concentrations of SS, DOC, IC, N03--N and
DTN. To the contrary,the deeperpathwayscontainhigherconcentrationsof Na+
and Si. These results suggest that the changes in Tw and Wq could be used to
interpret theflow paths.
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PDF DOI: https://doi.org/10.22146/ijg.2289
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