Search

Your search keyword '"Wan, Yuanqiang"' showing total 9 results
Start Over Author "Wan, Yuanqiang"
9 results on '"Wan, Yuanqiang"'

5. Effect of straw incorporation on controlling runoff and soil erosion in cropland with different land degradation degrees.

Author

Wang, Chengshu, Zhang, Guanghui, Chen, Shiqi, and Wan, Yuanqiang

Subjects
SOIL conservation, LAND degradation, FARMS, STRAW, SOIL erosion, PLANT competition
Abstract

Straw incorporation plays a vital role in regulating runoff and soil erosion of cropland. However, the benefits of straw incorporation to control runoff and soil erosion on croplands under different degradation degrees have not been fully clarified. This study was performed to investigate the benefits of straw incorporation to reduce runoff and soil erosion under different degradation degrees and determine its dominant influencing factors. The event runoff and soil erosion were measured from late May to late September 2022 using 16 runoff plots (9 m in length and 3.3 m in width) in the black soil region of Northeast China. The results showed that straw incorporation significantly reduced runoff and soil erosion on croplands with different degradation intensities. Compared to croplands without straw incorporation, runoff and soil erosion of straw incorporation decreased by 48. 8%, 40.0%, 30.9%, 25.5%, and 55.2%, 48.8%, 40.8%, and 36.5% for croplands of no, light, moderate, and strong degradation intensities, respectively. The roles of straw incorporation in controlling runoff and erosion decreased with rainfall intensity. Compared to light rainfall, runoff reduction ratio and erosion reduction ratio of moderate and heavy rainfalls reduced by 19.5%–61.3% and 27.5%–64.4%. The benefit of straw incorporation to control runoff and erosion was limited on strong degraded cropland or under heavy storm. Moreover, soil hydrological properties and crop growth characteristics decreased by land degradation and improved by straw incorporation, which inevitably affected runoff and soil erosion. Soil bulk density, maximum rainfall intensity of 30‐min, saturated water content, precipitation, rainfall intensity, saturated hydraulic conductivity, and total porosity were the dominant factors affecting the roles of straw incorporation in controlling runoff and erosion on degraded croplands. The results of this study are helpful to prevent land degradation or recover the functions of degraded lands in semi‐humid region. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

8. The corresponding countermeasures of landslide risk control under influence of climate change in China

Author

Tong, Bin, Zhang, Yixiang, Qi, Gan, Shi, Jusong, Wan, Yuanqiang, He, Jianyin, and Yang, Xudong

Abstract

AbstractAs one of the most landslide-prone countries, China is significantly affected by climate change worldwide. Understanding the influences of climate change on landslides and optimizing the corresponding countermeasures cannot be overstated. In this article, an overview of climate change’s influences on landslides in China is presented, and the developing trends of landslides in various natural topographical regions were analyzed based on two decades of historical recordings. The regions and major categories of landslides that are potentially influenced by climate change are summarized. The results indicate a growing trend of climate change is affecting the geo-environment, leading to the corresponding increase in severity, complexity, and spatial-temporal uncertainties of landslides in China. Accordingly, a proactive response is warranted to establish a more dynamic, efficient, and integrated framework of landslide risk control. This framework should encompass the entire risk control process from landslide identification, risk assessment, monitoring, early warning and mitigation, to address the issues of ‘What-Where-When-Why’ landslides would occur, ‘Who’ are the vulnerable elements, and ‘How’ the mitigation should be performed scientifically. This article is expected to help better understand the influences of climate changes on landslides in China and highlight the countermeasures responding to the challenges.

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results