Peak flow responses and recession flow characteristics after thinning of Japanese cypress forest in a headwater catchment

B X Dung; T Gomi; S Miyata; Roy C Sidle

doi:10.3178/HRL.6.35

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Peak flow responses and recession flow characteristics after thinning of Japanese cypress forest in a headwater catchment

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Peak flow responses and recession flow characteristics after thinning of Japanese cypress forest in a headwater catchment

B X Dung, T Gomi, S Miyata and Roy C Sidle

Hydrological Research Letters, Vol.6, pp.35-40

2012

DOI: https://doi.org/10.3178/HRL.6.35

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Abstract

Physical Geography and Environmental Geoscience

Environmental Engineering

hydrograph analysis

forest thinning

Japanese cypress forest

peak flow

recession flow

internal flow paths

We evaluated the effects of forest thinning on peak flow and recession characteristics of storm runoff in headwater catchments at Mie Prefecture, Japan. In catchment M5, 58.3% of stems were removed, whereas catchment M4 remained untreated as a control catchment. Storm precipitation and runoff was monitored from June 2004 to January 2007 for the pre-thinning period (113 events) and from March 2007 to June 2009 for post-thinning (103 events). Based on paired-catchment analysis between M5 and M4, volumes of peak flow did not increase significantly after thinning. Recession constant K increased, while recession time of storm runoff did not differ between pre- and post-thinning periods. Storm hydrograph recession tended to be more gradual (i.e., higher K values) after thinning due to increases in available soil water associated with higher net precipitation and decreased evapotranspiration. The lack of changes in peak flow can be attributed to the minimal soil disturbance during thinning. Our hydrograph analysis in paired catchments indicates that thinning may alter specific internal hydrological pathways, such as subsurface flow and groundwater flow.

Details

Title: Peak flow responses and recession flow characteristics after thinning of Japanese cypress forest in a headwater catchment
Authors: B X Dung (Author) - United Graduate School of Agriculture Science, Japan
T Gomi (Author) - Tokyo University of Agriculture and Technology, Japan
S Miyata (Author) - Kyoto University, Japan
Roy C Sidle (Author) - Environmental Protection Agency
Publication details: Hydrological Research Letters, Vol.6, pp.35-40
Publisher: Japan Society of Hydrology and Water Resources
Date published: 2012
DOI: 10.3178/HRL.6.35
Copyright note: Copyright © 2012 Japan Society of Hydrology and Water Resources. The article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).
Organisation Unit: University of the Sunshine Coast, Queensland; Sustainability Research Cluster
Language: English
Record Identifier: 99450596002621
Output Type: Journal article

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