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Response of soil aggregate disintegration to antecedent moisture during splash erosion

文献类型：期刊论文

作者Li, Hairu7; Zhang, Qiong1,6,7; Wu, Jiujiang5; Zou, Huijie6; Xia, Xiaolin4; Dan, Chenxi7; Liu, Chang7; Guo, Zhen3; Zhang, Yang2; Liu, Gang1,6,7
刊名CATENA
出版日期2024
卷号234页码:8
ISSN号0341-8162
关键词Splash erosion Soil aggregates Physico-chemical dispersion Slaking Soil moisture content
DOI10.1016/j.catena.2023.107633
通讯作者Zhang, Qiong(zqiswc@nwafu.edu.cn) ; Liu, Gang(gliu@foxmail.com)
英文摘要Soil aggregate breakdown is the initial stage of splash erosion. Preventing aggregate disintegration can effectively control the material source for sediment transport. The impact factors of aggregate disintegration have been partially studied, but the effect of soil moisture content on slaking and physico-chemical dispersion remains unclear. In this study, simulation tests of splash erosion were carried out on three sandy clay loam soils with different years of vegetation restoration (S1, S2 and S3 were 55, 80 and 100 years of reforestation and land restoration, respectively). Three rainfall heights (1.5 m, 2 m and 2.5 m) were used to simulate aggregate disintegration caused by different rainfall kinetic energies. Soil aggregates with five antecedent moisture contents (air drying, 5 %, 10 %, 15 %, and 20 %) were subjected to three different pretreatments: fast wetting (FW), slow wetting (SW) and shaking after prewetting (WS). It was found that the mean weight diameter in the fast wetting (MWDFW) treatment increased and then decreased with increasing moisture content. Aggregate sensitivity to slaking decreased with increasing moisture content. After rainfall, the macroaggregates content (>0.25 mm) increased and then decreased with increasing moisture content. In the S1 sample, the contribution of physico-chemical dispersion to splash erosion was dominant for increasing splash erosion rate at the moisture content of 15-20 %. The slaking contributed more to decreasing splash erosion rate with increasing moisture content in the S2 and S3 samples. This study clarifies the response of slaking and physico-chemical dispersion to moisture content, which is helpful for thoroughly understanding the disintegration mechanisms of soil aggregates.
WOS关键词RAINDROP-IMPACT ; WATER-CONTENT ; MECHANICAL BREAKDOWN ; STABILITY ; DETACHMENT ; TRANSPORT ; SLAKING ; ENERGY
资助项目National Natural Science Foundation of China[U22A20613] ; National Natural Science Foundation of China[42277344] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA28010201]
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
出版者ELSEVIER
WOS记录号WOS:001107995400001
资助机构National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/200110]  
专题中国科学院地理科学与资源研究所
通讯作者Zhang, Qiong; Liu, Gang
作者单位1.Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China
2.Shaanxi Prov Land Engn Construct Grp Co Ltd, Xian 710075, Peoples R China
3.Sichuan Huabiaoce Testing Technol Co Ltd, Chengdu 610000, Peoples R China
4.Key Lab Water Conservancy & Water Resources Anhui, Bengbu 233000, Peoples R China
5.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Peoples R China
6.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
7.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess Pl, Yangling 712100, Peoples R China
推荐引用方式
GB/T 7714		 Li, Hairu,Zhang, Qiong,Wu, Jiujiang,et al. Response of soil aggregate disintegration to antecedent moisture during splash erosion[J]. CATENA,2024,234:8.
APA Li, Hairu.,Zhang, Qiong.,Wu, Jiujiang.,Zou, Huijie.,Xia, Xiaolin.,...&Liu, Gang.(2024).Response of soil aggregate disintegration to antecedent moisture during splash erosion.CATENA,234,8.
MLA Li, Hairu,et al."Response of soil aggregate disintegration to antecedent moisture during splash erosion".CATENA 234(2024):8.

入库方式： OAI收割

来源：地理科学与资源研究所

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