Bedrock Vadose Zone Storage Dynamics Under Extreme Drought: Consequences for Plant Water Availability, Recharge, and Runoff
Bedrock Vadose Zone Storage Dynamics Under Extreme Drought: Consequences for Plant Water Availability, Recharge, and Runoff
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极端干旱下基岩渗流带存储动态:对植物水可用性、补给和径流的影响
DOI:
10.1029/2021wr031781
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发表时间:
2022
影响因子:
5.4
通讯作者:
Schmidt, L.
中科院分区:
文献类型:
--
作者:
Hahm, W. J.;Dralle, D. N.;Sanders, M.;Bryk, A. B.;Fauria, K. E.;Huang, M. H.;Hudson‐Rasmussen, B.;Nelson, M. D.;Pedrazas, M. A.;Schmidt, L.
Bedrock vadose zone water storage (i.e., rock moisture) dynamics are rarely observed but potentially key to understanding drought responses. Exploiting a borehole network at a Mediterranean blue oak savanna site—Rancho Venada—we document how water storage capacity in deeply weathered bedrock profiles regulates woody plant water availability and groundwater recharge. The site is in the Northern California Coast Range within steeply dipping turbidites. In a wet year (water year 2019; 647 mm of precipitation), rock moisture was quickly replenished to a characteristic storage capacity, recharging groundwater that emerged at springs to generate streamflow. In the subsequent rainless summer growing season, rock moisture was depleted by about 93 mm. In two drought years that followed (212 and 121 mm of precipitation) the total amount of rock moisture gained each winter was about 54 and 20 mm, respectively, and declines were documented exceeding these amounts, resulting in progressively lower rock moisture content. Oaks, which are rooted into bedrock, demonstrated signs of water stress in drought, including reduced transpiration rates and extremely low water potentials. In the 2020–2021 drought, precipitation did not exceed storage capacity, resulting in variable belowground water storage, increased plant water stress, and no recharge or runoff. Rock moisture deficits (rather than soil moisture deficits) explain these responses.
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影响因子:
5.4
作者:
S. Zanardo;C. Harman;P. Troch;P. Rao;M. Sivapalan
通讯作者:
M. Sivapalan
DOI:
10.1029/2020jf005848
发表时间:
2021-03
期刊:
Journal of Geophysical Research: Earth Surface
影响因子:
--
作者:
M. Pedrazas;W. Hahm;Mong‐Han Huang;D. Dralle;M. Nelson;Rachel E. Breunig;K. Fauria;A. Bryk;W. Dietrich;D. Rempe
通讯作者:
M. Pedrazas;W. Hahm;Mong‐Han Huang;D. Dralle;M. Nelson;Rachel E. Breunig;K. Fauria;A. Bryk;W. Dietrich;D. Rempe
影响因子:
3.3
作者:
J. Wald;R. Graham;Phillip J. Schoeneberger
通讯作者:
Phillip J. Schoeneberger
影响因子:
5.2
作者:
Schmidt, Logan;Rempe, Daniella
通讯作者:
Rempe, Daniella
DOI:
10.1029/2020gc009172
发表时间:
2021
期刊:
Geosystems
影响因子:
--
作者:
Huang, Mong‐Han;Hudson‐Rasmussen, Berit;Burdick, Scott;Lekic, Vedran;Nelson, Mariel D.;Fauria, Kristen E.;Schmerr, Nicholas
通讯作者:
Schmerr, Nicholas