Results 21 to 30 of about 1,541 (191)
Shuitu Baochi Xuebao, 2022 为了探讨不同微地形下坡面土壤水分的时空分布及其变异规律,以北京土石山区人工林坡面为研究对象,在40 m×50 m坡面共布设30个土壤水分观测点,分10 cm间隔观测,观测深度为50~70 cm。2015年4—10月使用Diviner 2000共监测土壤水分20次。结果表明:(1)坡地土壤水分含量时间变化趋势一致,大体随着降雨波动的变化而变化。(2)土壤水分随坡位变化而变化,水平阶上坡位＜中坡位,缓坡中坡位＜下坡位。(3)坡面土壤水分整体随深度的增加而增加,水土保持工程措施可有效改善土壤水分状况 ...
梁潇瑜, 信忠保, 王志杰
doaj
Shuitu Baochi Xuebao, 2020 通过野外径流小区人工降雨试验，研究坡形和聚丙烯酰胺（PAM）对径流量、土壤侵蚀和养分流失的影响。试验设置2个PAM施用量，分别为0，2 mg/L；9种坡形处理，即4个凹形坡，4个凸形坡，1个直形坡。结果表明：（1）与均匀坡面相比，凸形坡的平均土壤流失量、氨氮流失量和磷酸盐流失量分别增加25.12%，24.01%和26.96%，且土壤和养分流失量随着凸形坡面的凸度增加而增加，凹形坡的平均土壤流失量、氨氮流失量和磷酸盐流失量分别减小13.53%，10.85%和19.95%；（2 ...
邢伟民 +4 more
doaj
Model Construction of InSAR-based Rainfall Thresholds for Landslide Hazards in Yanhe Basin, Chinese Loess Plateau [PDF]
[Objective] Empirical rainfall thresholds have geographical limitations, it is of great significance to carry out a rainfall threshold modeling study for landslide hazard on the Chinese Loess Plateau.
CHEN Manyu +5 more
core +1 more source
工程建设, 2020 随着我国经济社会的发展，各种工程项目如火如荼的进行。其中，建筑深基坑护坡领域颇受到人们的关注。文章中研究了基于新型材料的绿色装配式边坡支护的形式及施工方法，来替代以往施工过程中的在钢筋网片上喷射混凝土的支护形式。并且详细考察了绿色装配式防护坡面的抗拉强度、防水性能、及其可回收性质的研究。通过文章中的研究，证实了基于新型材料的绿色装配式边坡支护技术具有良好的工程质量和特性，满足工程需要，是一种替代采用钢筋网片上喷射混凝土的支护方法的有力技术手段。
羽涵 刘 +4 more
semanticscholar +1 more source
Effects of Tillage Disturbance on Slope Shape and Micro-topographic Features on Typical Sloping Cropland of Southwestern Alpine-canyon Area [PDF]
[Objective] The objective of this study was to investigate the effects of various tillage practices on on slope shape and micro-topographic features on typical sloping croplands of southwestern alpine-canyon area.
LIU Jingyi +8 more
core +1 more source
American Anthropologist, Volume 127, Issue 3, Page 517-528, September 2025.ABSTRACT This article examines the contested status of “sign language” in Singapore by exploring deaf people's experiences of the “Mother Tongues”—the state's designation for the official languages of Mandarin, Malay, and Tamil—with a particular focus on the relationships that deaf Chinese Singaporeans have with Mandarin.
Timothy Y. Loh
wiley +1 more source
测绘与勘探, 2020 贵阳某工程边坡，因暴雨等原因导致严重变形，布设 40 个监测点，对边坡进行应急监测。监测表明采用先快速后精确分阶段的应急方式是可行的；回填覆压能较快稳定边坡；支护边坡变形整体性较强，有“后仰式”滑移等特点。贵州属于山地，工程边坡较多，对类似边坡应急监测具有参考价值。
昭传 韦, 卓佳 陈
semanticscholar +1 more source
Realization of Pan Jiazheng′s extremum principle with optimization methods [PDF]
, 2017 2007-2008 > Academic research: refereed > Publication in refereed journalVersion of ...
Cheng, YM, Wang, JA, Zhao, ZH
core
Formation mechanism and stability analysis of a landslide in altered ophiolite in the upper reaches of Jinsha River: A case study of the Duirongtong landslide [PDF]
Objective The tectonic suture zone of the Qinghai-Tibet Plateau has a complex rock mass structure and special lithology combination and is thus prone for large landslides.
LI Jinqiu +3 more
core +1 more source
Conservation Biology, Volume 38, Issue 4, August 2024.Abstract Eradicating invasive predators from islands can result in substantial recovery of seabirds, but the mechanisms that drive population changes remain poorly understood. Meta‐analyses have recently revealed that immigration is surprisingly important to the recovery of philopatric seabirds, but it is not known whether dispersal and philopatry ...
Jeremy P. Bird +2 more
wiley +1 more source