椰壳土工织物和土工格室对中国东北软土地基地区短时冲沟侵蚀的影响

IF 2.7 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Xijin Qin, Yiqiu Sun, Yan Zhang, Yinghui Guan, Hailong Wu, Xinyu Wang, Guangyu Wang
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引用次数: 0

摘要

中国东北软土地基地区独特的地貌特征和耕作方式增加了汇水流量,加剧了短沟谷(EG)的侵蚀。植被在生长阶段遭受雨水侵蚀和破坏,给草地早期恢复带来严重问题。因此,本研究探讨了在四种汇流强度下,土工织物和土工格室对 EG 侵蚀的影响。模拟排水侵蚀试验结果表明,当汇流强度小于 30 L/min 时,土工格室和椰壳土工布对控制 EG 侵蚀有较好的效果,土工格室和椰壳土工布的泥沙产量分别减少了 25.95%-37.82% 和 73.73%-88.96%。然而,当汇流强度增加到 40 升/分钟时,椰壳土工布的保护作用减弱,泥沙产率急剧增加了 189.03%。当汇流强度增加到 50 升/分钟时,土工织物的保护作用消失。而土工格室则显示出流量越大,保护效果越好。此外,随着汇流强度的增加,椰壳土工布的侵蚀模式从片状侵蚀发展到间歇性跌落,再到完成主碾压,保护效果逐渐减弱。相比之下,土工格室下 EG 的保护作用则从连续冲刷到间歇冲刷,最后到间歇下落逐渐增强。这项研究表明,土工织物和土工格室都能防止 EG 侵蚀,而且土工格室对 EG 表面的保护效果优于土工织物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of coir geotextile and geocell on ephemeral gully erosion in the Mollisol region of Northeast China

The unique geomorphological features and farming methods in the Mollisol region of Northeast China increase water catchment flow and aggravate the erosion of ephemeral gully (EG). Vegetation suffers from rain erosion and damage during the growth stage, which brings serious problems to the restoration of grass in the early stage. Therefore, effects of coir geotextile and geocell on EG erosion under four confluence intensities were researched in this study. Results of the simulated water discharge erosion test showed that when the confluence strength was less than 30 L/min, geocell and coir geotextile had a good effect on controlling EG erosion, and sediment yield of geocell and coir geotextile was reduced by 25.95%–37.82% and 73.73%–88.96%, respectively. However, when confluence intensity increased to 40 L/min, protective effect of coir geotextile decreased, and sediment yield rate increased sharply by 189.03%. When confluence intensity increased to 50 L/min, the protective effect of coir geotextile was lost. On the other hand, geocell showed that the greater the flow rate, the better the protective effect. In addition, with the increase in confluence intensity, erosion pattern of coir geotextile developed from sheet erosion to intermittent fall and then to completion of main rill, and the protective effect was gradually weakened. In contrast, the protective effect of EG under geocell was gradually enhanced from the continuous rill to the intermittent rill and finally to the intermittent fall. This study shows that coir geotextile and geocell can prevent EG erosion, and the effect of geocell is better than that of coir geotextile on the surface of EG.

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来源期刊
Journal of Arid Land
Journal of Arid Land ENVIRONMENTAL SCIENCES-
CiteScore
4.70
自引率
6.70%
发文量
768
审稿时长
3.2 months
期刊介绍: The Journal of Arid Land is an international peer-reviewed journal co-sponsored by Xinjiang Institute of Ecology and Geography, the Chinese Academy of Sciences and Science Press. It aims to meet the needs of researchers, students and practitioners in sustainable development and eco-environmental management, focusing on the arid and semi-arid lands in Central Asia and the world at large. The Journal covers such topics as the dynamics of natural resources (including water, soil and land, organism and climate), the security and sustainable development of natural resources, and the environment and the ecology in arid and semi-arid lands, especially in Central Asia. Coverage also includes interactions between the atmosphere, hydrosphere, biosphere, and lithosphere, and the relationship between these natural processes and human activities. Also discussed are patterns of geography, ecology and environment; ecological improvement and environmental protection; and regional responses and feedback mechanisms to global change. The Journal of Arid Land also presents reviews, brief communications, trends and book reviews of work on these topics.
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