Future Risks of Tsunami‐Induced Seawater Intrusion Into Unconfined Coastal Aquifers: Insights From Numerical Simulations at Niijima Island, Japan
Future Risks of Tsunami‐Induced Seawater Intrusion Into Unconfined Coastal Aquifers: Insights From Numerical Simulations at Niijima Island, Japan
复制标题
海啸引起的海水入侵无承压沿海含水层的未来风险:日本新岛数值模拟的见解
DOI:
10.1029/2019wr025386
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发表时间:
2019
影响因子:
5.4
通讯作者:
T.
中科院分区:
文献类型:
--
作者:
Liu;J. and Tokunaga;T.
Tsunami‐induced seawater inundation causes vertical seawater infiltration into coastal aquifers and induces unexpected salinization of fresh groundwater resources. Assessing future risks of seawater intrusion in tsunami‐prone areas can provide essential information supporting disaster preparedness. In this study, we investigated seawater intrusion and aquifer recovery processes under the future Nankai earthquake and tsunami scenarios at Niijima Island, Japan. A groundwater model with a 2‐D vertical cross section was developed to solve variable‐density flow and salt transport in unsaturated‐saturated media using the numerical code, FEFLOW. Our simulation results indicate that the unsaturated zone behaves as an initial storage of the infiltrated seawater and controls the maximum amount of seawater infiltration during the anticipated tsunami inundation. The bedrock structures affect the direction of seawater movement in the saturated zone and the flushing time of the polluted aquifer. Our analysis suggests that the tsunami inundation height, the rainfall recharge rate, and hydraulic conductivity are the primary sources of uncertainties in the simulation results. These findings have implications for other tsunami‐prone zones with respect to the understanding of the relevant physical processes and model uncertainties.
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DOI:
10.5917/jagh.54.11
发表时间:
2012
期刊:
Journal of groundwater hydrology
影响因子:
--
作者:
K. Mori;Tomohiro Takahashi;Nobuyuki Okaniwa;N. Shibasaki;Takuya Ouchi
通讯作者:
Takuya Ouchi
影响因子:
5.4
作者:
Reina Nakaoka;K. Suzuki
通讯作者:
K. Suzuki
DOI:
10.2208/jscej1969.1974.222_79
发表时间:
1974
期刊:
--
影响因子:
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作者:
M. Hom;K. Ogihara;S. Shindo
通讯作者:
S. Shindo
影响因子:
--
作者:
K. Villholth
通讯作者:
K. Villholth
影响因子:
7
作者:
C. Sivakumar;L. Elango
通讯作者:
C. Sivakumar;L. Elango