Numerical model development for investigating hydrologic pathways in shallow fluviokarst
Numerical model development for investigating hydrologic pathways in shallow fluviokarst
复制标题
研究浅层河流喀斯特水文路径的数值模型开发
DOI:
10.1016/j.jhydrol.2020.125844
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发表时间:
2021
影响因子:
6.4
通讯作者:
Bettel, Leonie
中科院分区:
文献类型:
--
作者:
Al Aamery, Nabil;Adams, Ethan;Fox, James;Husic, Admin;Zhu, Junfeng;Gerlitz, Morgan;Agouridis, Carmen;Bettel, Leonie
Karst pathways and fluvial pathways control hydrology in shallow fluviokarst basins, and numerical modelling of fluviokarst is seldom reported. In this study, we developed a combined discrete-continuum fluviokarst numerical model by simulating surface river routing, in-stream swallet sources and sinks, epikarst storage and dynamic transfer, matrix bedrock interactions, and closed conduit phreatic flow. We applied the model to the Cane Run-Royal Spring basin in Kentucky, USA. Model evaluation indicated that spring discharge alone inadequately constrained model pathways and uncertainty. Instead multi-objective calibration, integrating riverine discharge and well-head data from multiple locations, assisted in identifying sensitive parameters (p < 0.05). Multi-objectives improved representation of stream-cave connectivity and limited prior knowledge biases of the system but was computationally expensive with 168 h required on a high-performance cluster. Results provided evidence for a mature fluviokarst basin with well-defined fracture-conduit network and phreatic aquifer. Residence times of karst pathways vary by five orders of magnitude, ranging from less than one hour in vertical swallets, 12.7 h in longitudinal conduits, 12.7 days in the vadose zone and epikarst, and 142.7 days in the bedrock matrix. Results suggest arrival of source waters to the subsurface systems is disconnected in time from the springflow response. Model simulations show a dimensionless vertical to longitudinal conveyance ratio helps predict swallets linking the fluvial and karst systems. Transferability of the developed model, and other karst models, is discussed relative to availability of information for karst basins.
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DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
A. Husic;J. Fox;C. Agouridis;J. Currens;W. Ford;C. Taylor
通讯作者:
C. Taylor
DOI:
--
发表时间:
1967
期刊:
影响因子:
--
作者:
R. Miller
通讯作者:
R. Miller
影响因子:
6.4
作者:
M. Pétré;A. Rivera;R. Lefebvre
通讯作者:
R. Lefebvre
影响因子:
6.4
作者:
Massei, N.;Dupont, J. P.;Ogier, S.
通讯作者:
Ogier, S.
DOI:
--
发表时间:
2007
期刊:
--
影响因子:
--
作者:
S. Worthington;W. Groundwater
通讯作者:
S. Worthington;W. Groundwater