Water 2014, 6(6), 1671-1684; doi:10.3390/w6061671
Article

Effect of Hydrograph Separation on Suspended Sediment Concentration Predictions in a Forested Headwater with Thick Soil and Weathered Gneiss Layers

1,* email, 1email, 2email and 3email
Received: 26 February 2014; in revised form: 16 April 2014 / Accepted: 20 April 2014 / Published: 11 June 2014
(This article belongs to the Special Issue Environmental Tracers)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Two-component hydrograph separation using oxygen-18 concentrations was conducted at a sediment runoff observation weir installed in a small subcatchment of a forested gneiss catchment in Japan. The mean soil thickness of this catchment is 7.27 m, which comprises 3.29 m of brown forest soil (A and B layers) and a 3.98-m layer of heavily weathered gneiss. Data were collected for a storm on 20–21 May 2003, and the percentage of event water separated by the stable isotope ratio in comparison with the total rainfall amount was about 1%. This value is within the ratio of a riparian zone in a drainage area. Temporal variation of suspended sediment concentration exhibited higher correlation with the event water component than with the total runoff or pre-event water component. This shows that the riparian zone causes rainwater to flow out quickly during a rain event, and that this is an important area of sediment production and transportation in a forested headwater with thick soil and weathered gneiss layers.
Keywords: event and pre-event waters; hydrograph separation; subsurface stormflow; suspended sediment; riparian zone
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MDPI and ACS Style

Kabeya, N.; Shimizu, A.; Zhang, J.-J.; Nobuhiro, T. Effect of Hydrograph Separation on Suspended Sediment Concentration Predictions in a Forested Headwater with Thick Soil and Weathered Gneiss Layers. Water 2014, 6, 1671-1684.

AMA Style

Kabeya N, Shimizu A, Zhang J-J, Nobuhiro T. Effect of Hydrograph Separation on Suspended Sediment Concentration Predictions in a Forested Headwater with Thick Soil and Weathered Gneiss Layers. Water. 2014; 6(6):1671-1684.

Chicago/Turabian Style

Kabeya, Naoki; Shimizu, Akira; Zhang, Jian-Jun; Nobuhiro, Tatsuhiko. 2014. "Effect of Hydrograph Separation on Suspended Sediment Concentration Predictions in a Forested Headwater with Thick Soil and Weathered Gneiss Layers." Water 6, no. 6: 1671-1684.

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