ISSN:
1573-5117
Keywords:
stream
;
sediment
;
sand
;
hyporheal
;
oxygen
;
temperature
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Dissolved oxygen, pH, conductivity and alkalinity of surface and subsurface interstitial waters were investigated at Mill Creek (a small, rural, predominantly sandy stream in east Texas). Dissolved oxygen concentration tended to decrease with sediment depth, while conductivity and alkalinity did not significantly change with substrate depth. Surface water pH was significantly higher than interstitial water (p = 0.05). Chemical analyses of subsurface water from a pre- to post-storm event showed a depression in dissolved oxygen concentration in moderate and deep interstitial waters, immediately following the return of stream base flow, with the deeper strata returning to pre-storm oxygen levels four days later. A thermal convective current mechanism is proposed which would serve to transport surface water downward into these deeper interstices.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02391980
