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Impacts of grass basal diameter on runoff erosion force and energy consumption in gully bed in dry-hot valley region, Southwest China

文献类型：期刊论文

作者Yang, Dan1,2,3; Xiong, Donghong1; Zhang, Baojun1
刊名JOURNAL OF SOILS AND SEDIMENTS
出版日期2022-04-28
页码14
ISSN号1439-0108
关键词Grass basal diameter Erosion force Hydrodynamic properties Energy consumption Dry-hot valley region
DOI10.1007/s11368-022-03216-w
通讯作者Xiong, Donghong(dhxiong@imde.ac.cn)
英文摘要Purpose Gully erosion is one of the major contributors to severe land degradation in the Yuanmou Dry-hot Valley Region, Southwest China. Grass has been proved to have great advantages in gully erosion control. This study aimed to detect the influence of grass basal diameter on change processes of runoff velocity, sediment transport rate, and runoff energy consumption. Materials and methods A series of scouring tests were conducted based on a field experimental platform under the same flow discharge, and the impacts of different grass basal diameter (d) (0, 17, 43, 70, and 98 mm) on variations of runoff velocity (v), sediment transport capacity (S-t), and runoff energy consumption (E-c) were explored in this study. Results and discussion The results showed that values of runoff velocity and sediment transport capacity decreased notably with the increase of grass basal diameter, and two declining power functions can be found (v = 0.689*d<^>(- 0.106), p < 0.01; S-t = 0.741-2.228E-11*d<^>4.701, p < 0.01). As for the spatiotemporal variation, the influence of grass basal diameter on runoff velocity had obvious stage features, and the influence on sediment transport capacity mainly concentrated on spatial variation in the downstream of gully bed (16(th)-20(th) m away from gully head). Furthermore, the increasing of grass basal diameter could effectively enhance runoff energy consumption, and a logistic growth function had been found. Finally, the grass basal diameter of 70 mm proved to be the critical grass basal diameter for effectively reducing runoff erosion force and increasing runoff energy consumption in gully beds in this study. Conclusion These results indicate that the grass growth can effectively reduce runoff erosion force and increase runoff energy consumption, and in general, this function will be enhanced with the improvement of grass basal diameter in gully beds.
WOS关键词GRAZING MANAGEMENT OPTIONS ; BLACK SPEARGRASS PASTURE ; LOESS PLATEAU ; SOIL-EROSION ; VEGETATION DISTRIBUTION ; HETEROPOGON-CONTORTUS ; HYDRAULIC-PROPERTIES ; ANIMAL PRODUCTIVITY ; SEDIMENT YIELD ; ROOTS
资助项目National Natural Science Foundation of China[41807075] ; China West Normal University General Cultivation Project[18B07] ; West Light Foundation of the Chinese Academy of Sciences ; China West Normal University Research and Innovation Team Project[CXTD2018-10]
WOS研究方向Environmental Sciences & Ecology ; Agriculture
语种英语
出版者SPRINGER HEIDELBERG
WOS记录号WOS:000788419900001
资助机构National Natural Science Foundation of China ; China West Normal University General Cultivation Project ; West Light Foundation of the Chinese Academy of Sciences ; China West Normal University Research and Innovation Team Project
源URL[http://ir.igsnrr.ac.cn/handle/311030/175361]  
专题中国科学院地理科学与资源研究所
通讯作者Xiong, Donghong
作者单位1.Chinese Acad Sci & Minist Water Resources, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China
2.China West Normal Univ, Sch Geog Sci, Nanchong 637009, Peoples R China
3.China West Normal Univ, Sichuan Prov Engn Lab Monitoring & Control Soil E, Nanchong 637009, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Dan,Xiong, Donghong,Zhang, Baojun. Impacts of grass basal diameter on runoff erosion force and energy consumption in gully bed in dry-hot valley region, Southwest China[J]. JOURNAL OF SOILS AND SEDIMENTS,2022:14.
APA Yang, Dan,Xiong, Donghong,&Zhang, Baojun.(2022).Impacts of grass basal diameter on runoff erosion force and energy consumption in gully bed in dry-hot valley region, Southwest China.JOURNAL OF SOILS AND SEDIMENTS,14.
MLA Yang, Dan,et al."Impacts of grass basal diameter on runoff erosion force and energy consumption in gully bed in dry-hot valley region, Southwest China".JOURNAL OF SOILS AND SEDIMENTS (2022):14.

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来源：地理科学与资源研究所

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