Rainfall recharge thresholds in a subtropical climate determined using a regional cave drip water monitoring network
Rainfall recharge thresholds in a subtropical climate determined using a regional cave drip water monitoring network
复制标题
使用区域洞穴滴水监测网络确定亚热带气候下的降雨补给阈值
DOI:
10.1016/j.jhydrol.2020.125001
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发表时间:
2020
影响因子:
6.4
通讯作者:
Baker A
中科院分区:
文献类型:
--
作者:
Baker A
Quantifying the combination of climatic and hydrological conditions required to generate groundwater recharge is challenging, yet of fundamental importance for groundwater resource management. Here we demonstrate a new unsaturated zone physical method of determining rainfall-recharge thresholds in karst using a regional cave drip water monitoring network. For limestones of the Upper and Lower Macleay Valley, eastern Australia, set in a subtropical climate, we observe thirty-one cave drip water recharge events over a five-year monitoring period. Comparison to antecedent precipitation demonstrates a median observed recharge threshold of 76 mm/week precipitation (Lower Macleay) and 79 mm/week precipitation (Upper Macleay), with lower precipitation thresholds (down to 30 mm/week) possible. We use a simple water budget model to quantify soil and epikarst water storage volumes and to test hypotheses of the hydrological controls. Modelled soil and epikarst water storage capacities of about 65 mm (Lower Macleay) and 80 mm (Upper Macleay) confirm a correspondence between observed weekly precipitation thresholds and soil and epikarst capacities. However, discrepancies between observed and simulated recharge events helps elucidate the likely recharge processes including focussed recharge bypassing the soil and epikarst store, overflow and drainage between multiple karst stores, and tree water use from depth. Our observed recharge thresholds and modelled soil and epikarst storage capacities are comparable to recharge thresholds estimated across a range of water-limited environments globally. The method is readily applicable to any karst region where drip loggers can be installed in a cave system in close proximity to surface climate data.
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影响因子:
6.7
作者:
S. Jasechko;R. Taylor
通讯作者:
S. Jasechko;R. Taylor
影响因子:
6.4
作者:
A. Frost;W. Dawes;Bill Wang;R. Crosbie;J. Vaze;N. Viney
通讯作者:
N. Viney
影响因子:
4.4
作者:
P. Treble;Mukhlis Mah;A. Griffiths;A. Baker;M. Deininger;B. Kelly;D. Scholz;S. Hankin
通讯作者:
S. Hankin
DOI:
--
发表时间:
2022
期刊:
影响因子:
--
作者:
広瀬浩二郎;山本容子;庄司佳子・小林知子・奥西麻衣子・河原佑香・柿野成美
通讯作者:
庄司佳子・小林知子・奥西麻衣子・河原佑香・柿野成美
影响因子:
5.3
作者:
M. Cuthbert;Andy Baker;C. Jex;P. W. Graham;P. Treble;Martin S. Andersen;R. Ian Acworth
通讯作者:
M. Cuthbert;Andy Baker;C. Jex;P. W. Graham;P. Treble;Martin S. Andersen;R. Ian Acworth