Water flux and sediment transport within a forested landscape: the role of connectivity, subsurface flow, and slope length scale on transport mechanism
Article
Article Title | Water flux and sediment transport within a forested landscape: the role of connectivity, subsurface flow, and slope length scale on transport mechanism |
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ERA Journal ID | 1948 |
Article Category | Article |
Authors | Ghahramani, Afshin (Author) and Ishikawa, Yoshiharu (Author) |
Journal Title | Hydrological Processes |
Journal Citation | 27 (26), pp. 4091-4102 |
Number of Pages | 12 |
Year | 2013 |
Place of Publication | United Kingdom |
ISSN | 0885-6087 |
1099-1085 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/hyp.9791 |
Web Address (URL) | http://onlinelibrary.wiley.com/doi/10.1002/hyp.9791/full |
Abstract | The connectivity and upscaling of overland runoff and sediment transport are important issues in hillslope hydrology to identify water flux and sediment transport within landscape. These processes are highly variable in time and space with regard to their interactions with vegetation and soil surface conditions. The generation of overland runoff and its spatial connectivity were examined along a slope to determine the variations in the transport mechanism of runoff and soil particles by rain splash and overland runoff. Field experiments were conducted by erosion plots on a steep hillslope at lengths of 5, 10, and 15 m. The overland runoff connectivity and flow transport distance decreased with the slope length, while spatial variability of infiltration increased significantly with the slope length. Observation of subsurface flow revealed that surface soil and litter layer could have important role in water transport. However, the surface soil water content and water flux transport along the slope was highly variable for different storm events; the variability was related to the complexity of the system, mainly by way of the initial wetness conditions and infiltration characteristics. Only net rain-splashed soil was measurable, but examination of the water flux, overland runoff and sediment transport connectivity, characteristics of sheetwash, and the variability in spatial infiltration indicated an increase in the contribution of the rain splash transport mechanism along the slope. |
Keywords | hillslope; scaling; overland runoff; subsurface runoff; rain splash; sheetwash; HYDRUS |
ANZSRC Field of Research 2020 | 410406. Natural resource management |
410699. Soil sciences not elsewhere classified | |
379999. Other earth sciences not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia |
Tokyo University of Agriculture and Technology, Japan | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3q59/water-flux-and-sediment-transport-within-a-forested-landscape-the-role-of-connectivity-subsurface-flow-and-slope-length-scale-on-transport-mechanism
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