The original online version of this article was revised.The first author is“ZHANG Weng-xiang”in the original article.The first author’s name has been corrected to“ZHANG Wen-xiang”.
A large number of loose piles formed by mountain hazards are highly susceptible to hydraulic erosion under rainfall conditions.The use of ecological substrate materials for erosion control and ecological restoration o...A large number of loose piles formed by mountain hazards are highly susceptible to hydraulic erosion under rainfall conditions.The use of ecological substrate materials for erosion control and ecological restoration of gravel soil slopes has become a current research hotspot and the study difficulty.The post-earthquake slump accumulation gravel soil in Jiuzhaigou was selected as the research object,and the self-developed modified glutinous rice-based material was used to reinforce the gravel soil.The variable slope flume erosion test and rainfall simulation test were carried out to study the water erosion resistance of the material reconstructed soil under the influence of runoff erosion and raindrop splash erosion.The results show that:As the material content reached 12.5%,the reconstructed soil did not disintegrate after 24 hours of immersion,the internal friction angle was increased by 42.26%,and the cohesion was increased by 235.5%,which played a significant reinforcement effect.In the process of slope erosion,the soil rill erodibility parameter Kr was only 3‰ of the gravel soil control group,the critical shear force τ increased by 272%,and the soil erosion resistance was significantly improved.In the process of rainfall and rainfall on the slope,the runoff intensity of the reconstructed soil was stable,and the ability to resist runoff erosion and raindrop splash erosion was enhanced.The maximum value of soil loss rate on different slope slopes is 0.02-0.10 g·m^(-2)s^(-1),which is significantly lower than that of the control group and has better erosion reduction effect.展开更多
成人全面而有效地参与学习是保障2030年可持续发展目标实现的关键因素之一。但联合国教科文组织2019年发布的第四份《成人学习与教育全球报告》显示,当前全球范围内成人学习与教育(Adult Learning and Education, ALE)的平均参与率仍然...成人全面而有效地参与学习是保障2030年可持续发展目标实现的关键因素之一。但联合国教科文组织2019年发布的第四份《成人学习与教育全球报告》显示,当前全球范围内成人学习与教育(Adult Learning and Education, ALE)的平均参与率仍然不高,而且不同国家和地区之间的差异明显,一定程度上影响了可持续发展目标的实现。究其原因主要是成人参与学习的主观意识不强、社会环境欠佳、保障体制待完善等。为破除这些障碍,需从激发成人个体学习意识、构建社会支持系统、塑造有利于成人学习的社会环境出发,帮助更多的成人参与学习和接受教育,促进全球化时代全民学习社会的早日实现。展开更多
文摘The original online version of this article was revised.The first author is“ZHANG Weng-xiang”in the original article.The first author’s name has been corrected to“ZHANG Wen-xiang”.
基金jointly funded by the Sichuan Provincial Natural Science Foundation of China (Grant No.2023NSFSC0378)the Jiuzhaigou Lake Swamp and River Ecological Restoration Research Project (N5132112022000246)。
文摘A large number of loose piles formed by mountain hazards are highly susceptible to hydraulic erosion under rainfall conditions.The use of ecological substrate materials for erosion control and ecological restoration of gravel soil slopes has become a current research hotspot and the study difficulty.The post-earthquake slump accumulation gravel soil in Jiuzhaigou was selected as the research object,and the self-developed modified glutinous rice-based material was used to reinforce the gravel soil.The variable slope flume erosion test and rainfall simulation test were carried out to study the water erosion resistance of the material reconstructed soil under the influence of runoff erosion and raindrop splash erosion.The results show that:As the material content reached 12.5%,the reconstructed soil did not disintegrate after 24 hours of immersion,the internal friction angle was increased by 42.26%,and the cohesion was increased by 235.5%,which played a significant reinforcement effect.In the process of slope erosion,the soil rill erodibility parameter Kr was only 3‰ of the gravel soil control group,the critical shear force τ increased by 272%,and the soil erosion resistance was significantly improved.In the process of rainfall and rainfall on the slope,the runoff intensity of the reconstructed soil was stable,and the ability to resist runoff erosion and raindrop splash erosion was enhanced.The maximum value of soil loss rate on different slope slopes is 0.02-0.10 g·m^(-2)s^(-1),which is significantly lower than that of the control group and has better erosion reduction effect.
文摘成人全面而有效地参与学习是保障2030年可持续发展目标实现的关键因素之一。但联合国教科文组织2019年发布的第四份《成人学习与教育全球报告》显示,当前全球范围内成人学习与教育(Adult Learning and Education, ALE)的平均参与率仍然不高,而且不同国家和地区之间的差异明显,一定程度上影响了可持续发展目标的实现。究其原因主要是成人参与学习的主观意识不强、社会环境欠佳、保障体制待完善等。为破除这些障碍,需从激发成人个体学习意识、构建社会支持系统、塑造有利于成人学习的社会环境出发,帮助更多的成人参与学习和接受教育,促进全球化时代全民学习社会的早日实现。
