Effects of spatial variations in rock fragments related to tillage on hydrological processes and sediment transport | |
Dai, Jiadong3,4; Zhang, Jianhui4; Xue, Ke2; Yang, Feng2; Huang, Fucheng2; Zhao, Hu2; Ma, Xiaoyun2; Dai, Changjiang2; Xu, Yuanmao2; Li, Mingtao2 | |
刊名 | CATENA |
2022-04-01 | |
卷号 | 211页码:10 |
关键词 | Tillage erosion Rock fragment content Spatial variation Subsurface flow Deep percolation Subsurface erosion |
ISSN号 | 0341-8162 |
DOI | 10.1016/j.catena.2021.105963 |
英文摘要 | Cultivation activities play an important role in shaping the spatial distribution of rock fragments in hilly agricultural landscapes. The spatial variation in rock fragment contents (SVRFC) can exert strong effects on the spatial heterogeneity of soil properties with great implications for hydrological fluxes and soil erosion. However, previous research always assumed that rock fragments were homogenously distributed, but little has been known concerning the SVRFC over the hillslope and its influence on hydrological and erosional processes. In this study, simulated rock fragment contents (RFCs) in soil layers at the upper (0.6 kg kg(- 1)) and lower slope positions (0, 0.2, 0.4 and 0.6 kg kg(-1)) were established in combination with artificial rainfall experiments, to investigate the influence of RFC difference between the upper and lower slope positions on hydrological and erosional processes. Results show that the decreasing RFC difference reduced the yield of surface flow (5-100%), but increased yields of subsurface flow (58-792%) and deep percolation (19-130%). Additionally, the decreasing RFC difference reduced the runoff velocity of surface flow and surface erosion rate, but aggravated subsurface erosion. Especially under the 0 kg kg(-1) RFC difference, the intense soil loss occurred at the subsurface which may be due to the highly developed preferential flow. With increasing rainfall intensity, great increments in yields of subsurface flow, deep percolation and subsurface sediments were found under the small RFC difference which had small increments in yields of surface flow and surface sediments. These results suggest that the changing SVRFC related to tillage erosion can exert strong influence on behaviors of hydrological and erosional processes. Our study provides a better understanding of the interaction between agricultural cultivation and soil-water loss in hilly agricultural landscapes. |
资助项目 | National Natural Science Foundation of China[41877069] |
WOS关键词 | CONCENTRATED FLOW HYDRAULICS ; PREFERENTIAL FLOW ; SOIL-EROSION ; SUBSURFACE FLOW ; WATER-BALANCE ; STONY SOILS ; HILLSLOPE ; RUNOFF ; RAINFALL ; COVER |
WOS研究方向 | Geology ; Agriculture ; Water Resources |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:000790468400007 |
资助机构 | National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/56659] |
专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
通讯作者 | Zhang, Jianhui |
作者单位 | 1.China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100048, Peoples R China 2.Sichuan Agr Univ, Coll Water Conservancy & Hydropower Engn, Yaan, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Mt Hazards & Environm, Minist Water Conservancy, Chengdu 610041, Peoples R China |
推荐引用方式 GB/T 7714 | Dai, Jiadong,Zhang, Jianhui,Xue, Ke,et al. Effects of spatial variations in rock fragments related to tillage on hydrological processes and sediment transport[J]. CATENA,2022,211:10. |
APA | Dai, Jiadong.,Zhang, Jianhui.,Xue, Ke.,Yang, Feng.,Huang, Fucheng.,...&Xu, Haichao.(2022).Effects of spatial variations in rock fragments related to tillage on hydrological processes and sediment transport.CATENA,211,10. |
MLA | Dai, Jiadong,et al."Effects of spatial variations in rock fragments related to tillage on hydrological processes and sediment transport".CATENA 211(2022):10. |
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