气候变化领域集成服务门户(CCPortal): Redressing the balance: Quantifying net intercatchment groundwater flows

CCPortal

DOI	10.5194/hess-22-6415-2018
	Redressing the balance: Quantifying net intercatchment groundwater flows
	Bouaziz L.; Weerts A.; Schellekens J.; Sprokkereef E.; Stam J.; Savenije H.; Hrachowitz M.
发表日期	2018
ISSN	1027-5606
起始页码	6415
结束页码	6434
卷号	22 期号:12
英文摘要	Intercatchment groundwater flows (IGFs), defined as groundwater flows across topographic divides, can occur as regional groundwater flows that bypass headwater streams and only drain into the channel further downstream or directly to the sea. However, groundwater flows can also be diverted to adjacent river basins due to geological features (e.g., faults, dipping beds and highly permeable conduits). Even though intercatchment groundwater flows can be a significant part of the water balance, they are often not considered in hydrological studies. Yet, assuming this process to be negligible may introduce misrepresentation of the natural system in hydrological models, for example in regions with complex geological features. The presence of limestone formations in France and Belgium potentially further exacerbates the importance of intercatchment groundwater flows, and thus brings into question the validity of neglecting intercatchment groundwater flows in the Meuse basin. To isolate and quantify the potential relevance of net intercatchment groundwater flows in this study, we propose a three-step approach that relies on the comparison and analysis of (1) observed water balance data within the Budyko framework, (2) results from a suite of different conceptual hydrological models and (3) remote-sensing-based estimates of actual evaporation. The data of 58 catchments in the Meuse basin provide evidence of the likely presence of significant net intercatchment groundwater flows occurring mainly in small headwater catchments underlain by fractured aquifers. The data suggest that the relative importance of net intercatchment groundwater flows is reduced at the scale of the Meuse basin, as regional groundwater flows are mostly expected to be self-contained in large basins. The analysis further suggests that net intercatchment groundwater flow processes vary over the year and that at the scale of the headwaters, net intercatchment groundwater flows can make up a relatively large proportion of the water balance (on average 10 % of mean annual precipitation) and should be accounted for to prevent overestimating actual evaporation rates. © Author(s) 2018.
语种	英语
scopus关键词	Aquifers; Catchments; Evaporation; Groundwater flow; Hydrogeology; Lime; Remote sensing; Runoff; Comparison and analysis; Geological features; Headwater catchment; Hydrological models; Limestone formation; Mean annual precipitation; Regional groundwater flow; Three-step approach; Groundwater resources; aquifer; catchment; groundwater flow; headwater; hydrological modeling; limestone; remote sensing; water budget; Belgium; France; Meuse Basin
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159830
作者单位	Bouaziz, L., Water Resources Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, Delft, 2600 GA, Netherlands, Department Catchment and Urban Hydrology, Deltares, Boussinesqweg 1, Delft, 2629 HV, Netherlands; Weerts, A., Department Catchment and Urban Hydrology, Deltares, Boussinesqweg 1, Delft, 2629 HV, Netherlands, Hydrology and Quantitative Water Management Group, Department of Environmental Sciences, Wageningen University, Wageningen, Netherlands; Schellekens, J., VanderSat, Wilhelminastraat 43A, Haarlem, 2011 VK, Netherlands; Sprokkereef, E., Ministry of Infrastructure and Water Management, Zuiderwagenplein 2, Lelystad, 8224 AD, Netherlands; Stam, J., Ministry of Infrastructure and Water Management, Zuiderwagenplein 2, Lelystad, 8224 AD, Netherlands; Savenije, H., Water Resources Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, Delft, 2600 GA, Netherlands; Hrachowitz, M., Water Resources Section, Fac...
推荐引用方式 GB/T 7714	Bouaziz L.,Weerts A.,Schellekens J.,et al. Redressing the balance: Quantifying net intercatchment groundwater flows[J],2018,22(12).
APA	Bouaziz L..,Weerts A..,Schellekens J..,Sprokkereef E..,Stam J..,...&Hrachowitz M..(2018).Redressing the balance: Quantifying net intercatchment groundwater flows.Hydrology and Earth System Sciences,22(12).
MLA	Bouaziz L.,et al."Redressing the balance: Quantifying net intercatchment groundwater flows".Hydrology and Earth System Sciences 22.12(2018).