| 引用本文: | 张璐,刘渊博,雷孝章.黑麦草密度对坡面水流阻力影响的试验研究[J].灌溉排水学报,0,():-. |
| Zhang Lu,Liu Yuan Bo,Lei Xiao zhang.黑麦草密度对坡面水流阻力影响的试验研究[J].灌溉排水学报,0,():-. |
|
| 摘要: |
| 近年来随着生态修复工程、生态护坡工程的建设，坡面植被减少土壤侵蚀的作用备受关注。【目的】为了提高生态工程的水土保持效益，合理利用坡面植被挡蓄径流，减轻坡面工程土壤侵蚀。【方法】本文通过室内试验，模拟水流在不同密度植被覆盖下的坡面流动时水深及阻力的变化规律，详细描述坡面沿程水深规律并建立水深方程，研究阻力在整个坡面的分布及变化过程。【结果】（1）坡面水深方程，推求得出水流所受坡面总阻力方程。（2）刚性植被与柔性植被在坡面阻流中对水流的阻碍作用不同，植被对坡面水流的阻力不随植被密度增大而增大，坡面植被存在最优种植密度，使阻水效果最佳。【结论】在治理低山丘陵区的水力侵蚀时，植被种植密度不宜过疏或过密，坡面植被存在最优种植密度，使阻水效果最佳。 |
| 关键词: 坡面水流； 植被密度 ；水深 ； 阻力 |
| DOI： |
| 分类号:S157.1 |
| 基金项目: |
|
| Experimental study on the effect of ryegrass density on flow resistance slope |
|
Zhang Lu,Liu Yuan Bo,Lei Xiao zhang
|
|
1.Power China northwest engineering corporation limited;2.Sichuan unIiversitystate key laboratory of hydraulics and mountain river engineering Chengdu
|
| Abstract: |
| In recent years， with the construction of ecological restoration projects and ecological slope protection projects， the role of slope vegetation in reducing soil erosion has attracted much attention. 【Objective】 In order to improve the soil and water conservation benefits of ecological engineering， rational use of slope vegetation to store runoff and reduce soil erosion on slope engineering.【Method】This paper uses indoor experiments to simulate the water depth when the water flows on slopes under different vegetation cover. And the law of the change of resistance， detailing the law of water depth along the slope and establishing the water depth equation to study the distribution and change process of resistance over the entire slope.【Result】(1) The equation of water depth on the slope. The equation of total resistance on the slope to which the current is subjected is derived. (2) Rigid vegetation and flexible vegetation have different hindrances to water flow in slope blocking. The resistance of vegetation to slope flow does not increase with the increase of vegetation density. There is an optimal planting density for slope vegetation to make water blocking effect. optimal.【Conclusion】When controlling hydraulic erosion in low mountain and hilly areas， the vegetation density should not be too thin or too dense， and the optimal vegetation density exists on the slope vegetation to make the water blocking effect the best. |
| Key words: Overland;flow The;density of;vegetation Water;depth Resistance |
