Interaction between runoff – bedrock groundwater in a steep headwater catchment underlain by sedimentary bedrock fractured by gravitational deformation

Hydrological Processes - Tập 29 Số 20 - Trang 4398-4412 - 2015
Cristóbal Padilla1,2, Yuichi Onda1, Takehiko Iida1
1Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
2Laboratory of Erosion Control, Faculty of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502 Japan

Tóm tắt

AbstractRecent studies have suggested the importance of the bedrock groundwater (BG) contribution in storm runoff in headwater catchments. However, few such studies have been conducted, and the study of different types of bedrock conditions is still ongoing. The role of BG in storm runoff is still poorly understood, particularly in headwater catchments underlain by relatively deep fractured bedrock. This study aims to clarify this role using hydrometric and hydrochemical observations of BG via boreholes and catchment discharge. The responses of the BG to rainfall are demonstrated to be fast and independent of the sediment cover. The BG exhibits different responses and flow paths that are largely controlled by the bedrock fracture system. The storm runoff in the studied catchment is characterized by rapid discharge response generally followed by a delayed discharge response. The peak of the delayed discharge is much faster than that observed in previous studies, and it is well correlated with the BG levels. A hydrograph separation was performed for two storm events using three end members: rainfall, shallow BG and deep BG. The results demonstrate that the delayed discharge is primarily composed of deep BG. Moreover, a significant contribution of shallow BG is observed during large precipitation events. Although we observed no physical evidence of direct contributions of BG in the catchment, the calculations presented in this study demonstrate that the BG controls the hydrological and hydrogeological response of the catchment to rainfall events. Copyright © 2015 John Wiley & Sons, Ltd.

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Tài liệu tham khảo

Agata Y, 1997, Double‐peak storm runoff observed at a hilly watershed in the Soya hills, northern Japan and the conditions in which it occurs with special respect to basin water storage, Geographical Review of Japan, 70, 798, 10.4157/grj1984a.70.12_798

10.1002/Hyp.240

10.1002/esp.3290030402

10.1029/97wr02595

10.1007/1-4020-3508-X_29

10.1002/Hyp.6694

10.1016/0022-1694(85)90113-1

10.1016/j.jhydrol.2003.09.022

10.5194/hess-1-671-1997

10.1029/2008gl035481

10.1520/STP48465S

10.1016/j.jhydrol.2005.03.031

10.1016/j.jhydrol.2012.05.023

10.1002/(Sici)1099-1085(19991215)13:17<2813::Aid-Hyp901>3.3.Co;2-Y

10.1016/j.jhydrol.2009.07.056

10.1002/Hyp.7171

10.5194/hess-8-334-2004

10.1007/s10040-001-0178-0

10.1002/Hyp.7690

10.1002/Hyp.6231

10.1029/2006wr005370

10.1029/2004wr003275

10.3178/jjshwr.10.627

10.1029/2005wr004275

10.1029/2010wr009884

10.1029/95wr01951

10.1016/S0022-1694(00)00158-X

10.1016/j.jhydrol.2003.11.042

10.1029/Wr026i011p02821

10.1029/Wr026i003p00455

10.1029/2002wr001429

10.1016/0022-1694(93)90240-A

10.1029/Wr026i012p03021

10.5194/hess-16-1991-2012

10.1002/Hyp.234

10.1016/j.jhydrol.2006.06.009

10.1111/j.1745-6584.1994.tb00641.x

10.1016/j.geomorph.2013.08.024

10.1111/j.1745-6584.1997.tb00178.x

10.1016/j.jhydrol.2006.03.032

10.1029/2012wr012583

10.1016/0022-1694(95)02761-0

10.1002/Hyp.6265

10.1029/2003wr002139

10.1002/Hyp.1133

Uchida T, 2012, 12th Congress INTERPRAEVENT 2012, Grenoble, France, 609

10.1016/j.jhydrol.2012.10.014

10.1002/Hyp.5686

Weyman D, 1974, Fluvial Processes in Instrumented watersheds: Studies of small watersheds in the British Isles, 33

10.1002/Hyp.1071

Wilson CJ, 1987, The Contribution of Bedrock Groundwater Flow to Storm Runoff and High Pore Pressure Development in Hollows, 49

10.5194/hess-11-1441-2007

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Hydrological Processes

Tập 29 Số 20

4398-4412

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