| 夏卫生,雷廷武,刘春平,赵军.降雨条件下坡面薄层水流速度特征[J].水利学报,2004,35(11):0119-0123 |
| 降雨条件下坡面薄层水流速度特征 |
| Flow characteristics of sheet flow on slope under the condition of raining |
| 投稿时间：2003-07-02 |
| DOI： |
| 中文关键词: 降雨 坡面径流 薄层水流速度 电解质脉冲法 |
| 英文关键词: artificial raining runoff on slope velocity of sheet flow electrolyte pulse method |
| 基金项目:中国科学院引进国外杰出人才基金(982602)、国家自然科学基金(40171062)、中国科学院知识创新工程项目(KZCX3-SW-422) |
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| 中文摘要: |
| 通过在室内不同坡度和降雨强度下用电解质脉冲法对坡面水流速度进行测量。坡面长8m，宽15cm，坡度范围5°～25°。测量结果表明：在相同的降雨条件下，坡长对流速的影响不显著，而降雨强度和坡度对土壤侵蚀的影响相当显著；坡度越大，坡面产沙和冲沟发育越快；随着细沟的形成，水流速度逐渐减小。大坡度的水流速度变化揭示了细沟发育具有突发性特征。 |
| 英文摘要: |
| The electrolyte pulse method is used to measure the velocity of sheet flow on a slope in laboratory under the condition of artificial raining. The slope is 8m long with width 15cm, the gradient of the slope is varied in the range from 5° to 25°. The analysis of the measured result shows that the slope length gives little effect on flow velocity, but the rain intensity and slope gradient are the main factors significantly affecting the flow velocity. The higher gradient of slope leads to quicker occurrence of sediment yield and development of rill. The velocity decreases with the development of rill. The variation of flow velocity in high gradient reveals the paroxysmal characteristics of the development of rill. |
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