Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023434 |
Sensitivity of Global Hydrological Simulations to Groundwater Capillary Flux Parameterizations | |
Koirala, Sujan1; Kim, Hyungjun2; Hirabayashi, Yukiko3; Kanae, Shinjiro4; Oki, Taikan2,5 | |
2019 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:1页码:402-425 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Japan |
英文摘要 | Global land surface and hydrologic models, used to quantify the influence of groundwater (GW) dynamics on land surface hydrology, vary in parameterizations of the GW capillary flux and depth of moisture flux exchange between GW and unsaturated soil column (interaction depth). In this study, we demonstrate that the parameterization of capillary flux significantly affects the magnitude of GW-supported ET (15%) and GW recharge (25%). The largest sensitivities are associated with a strong dependence of the capillary flux parameterization on water table depth (WTD) with further controls by soil hydraulic properties. Under shallow WTD condition, the finer soils show a larger GW-supported ET for parameterization that depends only on WTD. Further, GW-supported ET reduces by 7-13% per meter increase in interaction depth used in simulation compared to simulation in which the interaction depth varies in space and time with WTD. The simulations of runoff, soil moisture, and WTD are even more sensitive to the difference in parameterization and interaction depth. Moreover, these sensitivities vary largely in both space and time. Evaluations against observation-based data and previous modeling simulations reveal that simulations with capillary flux perform better than that the one without it in regions with large GW-supported ET. We concur that capillary flux has a large and nonnegligible influence in global hydrologic simulation. But, the spatiotemporal variabilities of sensitivities of hydrological fluxes and storages demonstrate that different parameterization of GW capillary flux may also lead to a substantial uncertainty in global hydrologic simulations and subsequent water resources assessments. |
英文关键词 | global groundwater hydrology capillary flux groundwater recharge uncertainties groundwater resources |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459536500023 |
WOS关键词 | WATER-TABLE DYNAMICS ; LAND-SURFACE SCHEME ; SOIL-MOISTURE ; MODEL ; EVAPOTRANSPIRATION ; REPRESENTATION ; CLIMATE ; VARIABILITY ; VEGETATION ; PATTERNS |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21594 |
专题 | 资源环境科学 |
作者单位 | 1.Max Planck Inst Biogeochem, Dept Biogeochem Integrat, Jena, Germany; 2.Univ Tokyo, Dept Civil Engn, Inst Ind Sci, Tokyo, Japan; 3.Shibaura Inst Technol, Dept Civil Engn, Tokyo, Japan; 4.Tokyo Inst Technol, Dept Civil Engn, Tokyo, Japan; 5.United Nations Univ, Tokyo, Japan |
推荐引用方式 GB/T 7714 | Koirala, Sujan,Kim, Hyungjun,Hirabayashi, Yukiko,et al. Sensitivity of Global Hydrological Simulations to Groundwater Capillary Flux Parameterizations[J]. WATER RESOURCES RESEARCH,2019,55(1):402-425. |
APA | Koirala, Sujan,Kim, Hyungjun,Hirabayashi, Yukiko,Kanae, Shinjiro,&Oki, Taikan.(2019).Sensitivity of Global Hydrological Simulations to Groundwater Capillary Flux Parameterizations.WATER RESOURCES RESEARCH,55(1),402-425. |
MLA | Koirala, Sujan,et al."Sensitivity of Global Hydrological Simulations to Groundwater Capillary Flux Parameterizations".WATER RESOURCES RESEARCH 55.1(2019):402-425. |
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