A modified subsurface stormflow model of hillsides in forest catchment

Subsurface flow plays an important role in forest catchment hydrological processes, for which a modified model is established in this paper. Firstly, by taking soil samples from Natural Preserve Forests of Changbai Mountain, two crucial parameters for subsurface flow, the saturated hydraulic conduct...

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Bibliographic Details
Published in:Hydrological processes 2005-08, Vol.19 (13), p.2609-2624
Main Authors: Tiefan, Pei, Jianmei, Liu, Jinzhong, Li, Anzhi, Wang
Format: Article
Language:English
Subjects:
accuracy
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Earth sciences
Earth, ocean, space
effective porosity
Exact sciences and technology
forest catchment
Fundamental and applied biological sciences. Psychology
Hydrology
Hydrology. Hydrogeology
modification
saturated hydraulic conductivity
subsurface stormflow model
Synecology
Terrestrial ecosystems
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Summary:Subsurface flow plays an important role in forest catchment hydrological processes, for which a modified model is established in this paper. Firstly, by taking soil samples from Natural Preserve Forests of Changbai Mountain, two crucial parameters for subsurface flow, the saturated hydraulic conductivity and effective porosity, were measured in the laboratory. Secondly, submodels of the two parameters varying logarithmically with soil depth were established through regressive analysis. Then a modified subsurface stormflow model (Modified model) was founded by substituting the submodels into a storage–discharge model (Sloan's model), established by Sloan in 1983. Finally, to verify the Modified model, five rainfall events on a simulated hillside were carried out. The subsurface flow processes were simulated using the Modified model, Sloan's model and Robinson's model. The comparison of simulated subsurface stormflow processes using the three models respectively with measured ones showed that the Modified model obtained better accuracy for peak flow and total amount of subsurface stormflow than the other two models. Copyright © 2005 John Wiley & Sons, Ltd.
ISSN:0885-6087
1099-1085
DOI:10.1002/hyp.5734