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| DOI：10.13522/j.cnki.ggps.2017.0200 |
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| Design and Verification of a Non-conventional Physical Model for Studying Water Flow over Slope in Loess Plateau |
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LI Huijuan, GAO Jian’en, KANG Youcai, ZHANG Yuanyuan
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1.Research Center on Soil & Water Conservation of Ministry of Water Research, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; 2. Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| 【Objective】Measuring surface and subsurface water flow over slopes in loess plateau is difficult and problematic, and the objective of this paper is to present a non-conventional physical model to experimentally measure water and soil erosion involved in overflow in slope in loess plateau.【Method】The geometric scale of the physical model is less than 1 and it was designed based on the principles of soil-erosion mechanics, hydraulics, sediment transport and similarity theorem, considering surface runoff, sediment erosion and transport, as well as water infiltration, under turbulent flow condition. Performance of the model was verified against experimental data.【Result】Under the designed experimental conditions, flow continuity, ratio of inertia force to gravity, as well as the ratio of inertia to resistance were similar to those in the slope model constructed under normal condition with similar geometry and surface roughness.【Conclusion】The non-conventional scale physical model provides an alternative to study hydraulic properties of overflow in slopes in loess plateau. |
| Key words: Overflow; non-conventional scale; similarity theory; surface runoff |
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