Journal article
Experimental studies on the effects of pipeflow on throughflow partitioning
Journal of Hydrology, Vol.165(1-4), pp.207-219
1995
Abstract
Recent research has revealed that natural soil pipes provide important pathways for sub-surface movement of water and solutes, as well as contributing to landslide initiation. A benchscale experiment (in a sloping box 1 m in length) was conducted with a uniform sand to evaluate the effect of pipeflow on the overall hydrologic regime. A single drainage pipe (13 mm inside diameter (ID)) composed of five 20 cm segments, each with a different roughness coefficient (Manning's n), was placed 5 cm above the base of the 12.8° sloping box. Roughness elements were arranged in four different spatial combinations during hydraulic experiments. Piezometric levels were highest and pipeflow was lowest when the high-roughness (n = 0.325) portion of the pipe was located at the downslope end of the box. Measured values of pipeflow for different hydraulic gradients in each experiment were related to piezometric head above the pipe raised to the 0.32-0.42 power. Pipeflow was proportional to matrix flow in the soil above the pipe raised to the power of 0.4-0.6. These findings may be useful in estimating pipeflow in uniform soils and in validating two-domain models involving preferential flow in soils. © 1995.
Details
- Title
- Experimental studies on the effects of pipeflow on throughflow partitioning
- Authors
- Roy C Sidle (Author) - US Forest ServiceH Kitahara (Author) - Forestry and Forest Products Research InstituteT Terajima (Author) - Hokkaido Research OrganizationY Nakai (Author) - Forestry and Forest Products Research Institute
- Publication details
- Journal of Hydrology, Vol.165(1-4), pp.207-219
- Publisher
- Elsevier BV
- Date published
- 1995
- DOI
- 10.1016/0022-1694(94)02563-Q
- ISSN
- 0022-1694
- Organisation Unit
- University of the Sunshine Coast, Queensland; Sustainability Research Cluster
- Language
- English
- Record Identifier
- 99449477902621
- Output Type
- Journal article
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- Domestic collaboration
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- Web Of Science research areas
- Engineering, Civil
- Geosciences, Multidisciplinary
- Water Resources
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