岩石边坡喷播植草护坡工程的抗侵蚀效应

利用人工模拟降雨试验，从泥沙与养分流失的角度，对岩石边坡喷播植草护坡工程抵抗降雨侵蚀效应进行了研究，对侵蚀量与降雨强度、坡度、播种量及草的生长发育程度之间的关系进行了定量分析，揭示了岩石边坡喷播植草护坡工程抵抗降雨侵蚀的特征.结果表明:除降低雨滴动能外，坡面草本植被层具有明显的分流作用，降低了到达坡面的有效降雨量；泥沙与养分侵蚀量随坡度和播种量的增大而减少，随降雨强度的增加而增大，侵蚀量与试验因子间存在显著的函数关系，且抵抗降雨效应随草的生长发育程度表现出明显的时间动态特征；在高雨强下，基质的泥沙与养分流失量仍处于较低水平，表明岩石边坡喷播植草护坡工程具有较好的抵抗降雨能力. 

Effect of grass sowing by spraying for rock slope protection on anti-erosion

Considering soil erosion and nutrient loss, the effect of grass sowing by spraying for rock slope protection on anti-erosion was studied with simulating artificial rain. The relationship between the erosion loss and rain intensity, slope degree, amount of the seeding, and course of the grass development were analyzed quantitatively. The characteristics of the grass sowing by spraying for rock slope protection on anti-erosion were revealed. Results showed that the herbaceous vegetation could weaken kinetic energy of raindrops, and had a significant diffluent function during rainfall events to reduce effective precipitation on the slope. The erosion losses of soil and nutrients decreased with the increase of slope degree and amount of seeding, and increased with increasing rainfall intensity. There were remarkable functions between erosion losses and trial factors. The effects of the complex resisting rainfall exhibited remarkable temporal dynamic characteristics with grass development. The erosion losses of soil and nutrients kept a low level, even under higher rain intensity, which indicated that grass sowing by spraying for rock slope protection had good potential to resist rainfall.