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| Influence factors of runoff energy consumption and denudation amount on loess slope |
| Shen Zhenzhou1,Yao Wenyi1,Li Mian1,Xiao Peiqing1,Guo Jianping2 |
| 1.The Key Lab.of Yellow River Sediment,Yellow River Institute of Hydraulic Research,Yellow River Conservancy Commission,450003;2.Zhengzhou hengdong Thermoelectricity Company, 451464: Zhengzhou,China |
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Abstract We analyzed the soil erosion amount,runoff energy consumption and denudation amount under different flow amount and different slope degree to study the influence factors of runoff energy consumption and denudation amount on loess slope in hydraulic research base of yellow river institute.The observation data showed that: the amount of soil erosion increased with flow amount raise on 20° slope,the stable amount of soil erosion under 1 L/min flow amount condition was 1% of that under 5 L/min or 7.5 L/min flow amount condition;The stable amount of soil erosion under 3 L/min flow amount condition was 20% of that under 5 L/min or 7.5 L/min flow amount condition;On the same condition,the amount of soil erosion on 10°slope was 1/10 times than that on 20° or 30° slope;The slope energy consumption under 1 L/min flow amount condition was about 16.6 J/min,and 1/3 of that under 3 L/min flow amount condition,1/5 of that under 5 L/min flow amount condition,1/8 of that under 7.5 L/min flow amount condition;On the same condition,the slope energy consumption were near on 20° and 30° slope,were smaller 0.3 J/min than 10° slope;The denudation amount were near of 5 L/min or 7.5 L/min flow amount condition,and 2.5 times as large as the denudation amount of that under 3 L/min flow amount condition,50 times as large as the denudation amount under 1 L/min flow amount condition;The denudation amount were near on 20°or 30° slope,were 40 times as large as the denudation amount on 10°slope.The result could supply foundation datas for the Loess Plateau management.
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Received: 10 January 2009
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