TY - JOUR
T1 - Spatio-temporal streamflow generation in a small, steep headwater catchment in western Japan
AU - Sun, Haotian
AU - Kasahara, Tamao
AU - Otsuki, Kyoichi
AU - Saito, Takami
AU - Onda, Yuichi
N1 - Publisher Copyright:
© 2016 IAHS.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/4/4
Y1 - 2017/4/4
N2 - Headwaters contribute a substantial part of the flow in river networks. However, spatial variations of streamflow generation processes in steep headwaters have not been well studied. In this study, we examined the spatio-temporal variation of streamflow generation processes in a steep 2.98-ha headwater catchment. The time when baseflow of the upstream section exceeded that downstream was coincident with the time when the riparian groundwater switched from downwelling to upwelling. This suggests that upwelling of the riparian groundwater increased considerably in the upstream section during the wet period, producing a shift in the relative size of baseflow between the upstream and downstream sections. The timing of fluctuations among hillslope soil moisture, hillslope groundwater and streamflow reveals that the hillslope contributed to storm flow, but this contribution was limited to the wet period. Overall, these results suggest that streamflow generation has strong spatial variations, even in small, steep headwater catchments. EDITOR A. Castellarin ASSOCIATE EDITOR X. Chen.
AB - Headwaters contribute a substantial part of the flow in river networks. However, spatial variations of streamflow generation processes in steep headwaters have not been well studied. In this study, we examined the spatio-temporal variation of streamflow generation processes in a steep 2.98-ha headwater catchment. The time when baseflow of the upstream section exceeded that downstream was coincident with the time when the riparian groundwater switched from downwelling to upwelling. This suggests that upwelling of the riparian groundwater increased considerably in the upstream section during the wet period, producing a shift in the relative size of baseflow between the upstream and downstream sections. The timing of fluctuations among hillslope soil moisture, hillslope groundwater and streamflow reveals that the hillslope contributed to storm flow, but this contribution was limited to the wet period. Overall, these results suggest that streamflow generation has strong spatial variations, even in small, steep headwater catchments. EDITOR A. Castellarin ASSOCIATE EDITOR X. Chen.
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U2 - 10.1080/02626667.2016.1266635
DO - 10.1080/02626667.2016.1266635
M3 - Article
AN - SCOPUS:85006853579
VL - 62
SP - 818
EP - 829
JO - Hydrological Sciences Journal
JF - Hydrological Sciences Journal
SN - 0262-6667
IS - 5
ER -