Time‐Variable Transit Time Distributions in the Hyporheic Zone of a Headwater Mountain Stream
Time‐Variable Transit Time Distributions in the Hyporheic Zone of a Headwater Mountain Stream
复制标题
时间——源头山溪的潜流带中的变量渡越时间分布
DOI:
10.1002/2017wr021502
复制
发表时间:
2018
影响因子:
5.4
通讯作者:
Wondzell, Steven M.
中科院分区:
文献类型:
--
作者:
Ward, Adam S.;Schmadel, Noah M.;Wondzell, Steven M.
Exchange of water between streams and their hyporheic zones is known to be dynamic in response to hydrologic forcing, variable in space, and to exist in a framework with nested flow cells. The expected result of heterogeneous geomorphic setting, hydrologic forcing, and between‐feature interaction is hyporheic transit times that are highly variable in both space and time. Transit time distributions (TTDs) are important as they reflect the potential for hyporheic processes to impact biogeochemical transformations and ecosystems. In this study we simulate time‐variable transit time distributions based on dynamic vertical exchange in a headwater mountain stream with observed, heterogeneous step‐pool morphology. Our simulations include hyporheic exchange over a 600 m river corridor reach driven by continuously observed, time‐variable hydrologic conditions for more than 1 year. We found that spatial variability at an instance in time is typically larger than temporal variation for the reach. Furthermore, we found reach‐scale TTDs were marginally variable under all but the most extreme hydrologic conditions, indicating that TTDs are highly transferable in time. Finally, we found that aggregation of annual variation in space and time into a “master TTD” reasonably represents most of the hydrologic dynamics simulated, suggesting that this aggregation approach may provide a relevant basis for scaling from features or short reaches to entire networks.
登录
查看更多内容
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
J. Mallard;B. McGlynn;T. Covino
通讯作者:
T. Covino
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
R. Ryan;A. Packman;C. Welty
通讯作者:
C. Welty
影响因子:
2.8
作者:
S. Wondzell;M. Gooseff
通讯作者:
M. Gooseff
DOI:
--
发表时间:
1938
期刊:
影响因子:
--
作者:
Keizaburo Nakamura
通讯作者:
Keizaburo Nakamura
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
N. Schmadel;A. Ward;S. Wondzell
通讯作者:
S. Wondzell