Soil aggregate disintegration effects on soil erodibility in the water level fluctuation zone of the Three Gorges Reservoir, China | |
Nsabimana, Gratien2,3; Hong, Li2,3; Yuhai, Bao1,3; Nambajimana, Jean de Dieu2,3; Jinlin, Li2,3; Ntacyabukura, Tite2,3; Xiubin, He2,3 | |
刊名 | ENVIRONMENTAL RESEARCH |
2023-01-15 | |
卷号 | 217页码:11 |
关键词 | Aggregate stability Water level fluctuation Three gorges reservoir Disintegration rate Soil erodibility Soil organic matter |
ISSN号 | 0013-9351 |
DOI | 10.1016/j.envres.2022.114928 |
英文摘要 | Spatial hydrological alterations can affect soil structural stability. Over time, forces induced by water weaken soil aggregates and this has a negative implication to soil health. The Three Gorges Reservoir (TGR) in particular, experienced a long-term hydrological condition and repetitive seasonal water level fluctuations that could affect soil health. The present study was conducted to investigate the effects of different water levels on soil aggregate disintegration rate over time and its relation to soil erosion susceptibility in water reservoirs. Samples from different elevations (155 m, 160 m, 163 m, 166 m, 172 m, and 180 m) in the water level fluctuation zone (WLFZ) were exposed to continuous wet-shaking for 3, 9, 27, 54, and 81 min resulted to different WLF intensity accordingly. The results showed a comparative difference between aggregates size before and after the experi-ment where micro-aggregates (<0.25 mm) increased with respect to elevations increase. The exponential pre-diction proved that aggregate stability decreased with the increase of WLF intensity, insisting the effects of continuous hydrological stress to aggregate break-down. A couple of factors definitely confirmed that soil erodibility (k) is primarily determined by disintegration of soil aggregates for the surface soil of the TGR. Despite the fact that Disintegration rate (Dr) and k showed a positive relationship, R2 = 0.73 (p < 0.05), the results showed that the soil properties decreasing Dr also decreases soil erodibility in the study area. Non-effective role of soil organic matter (SOM) for stabilizing soil aggregates was primarily related to water level fluctuations inhibiting decomposition. Relying on the present findings, environmental problems mostly soil erosion in the TGR could be therefore linked to excessive destabilization of soil aggregates. Therefore, the results of this study should play a major role in determining the factors primarily inducing soil erosion in river reservoirs. |
资助项目 | National Natural Science Foundation of China[41977075] ; National Natural Science Foundation of China[U2040207] ; Sichuan Science and Technology Program[2022YFS0471] ; Sichuan Science and Technology Program[2020YFQ0002] ; Belt and Road Master Fellowship Program |
WOS关键词 | DRYING-WETTING CYCLES ; LOESS PLATEAU ; ORGANIC-MATTER ; AGRICULTURAL SOILS ; SIZE DISTRIBUTION ; RIPARIAN ZONE ; STABILITY ; EROSION ; VEGETATION ; DYNAMICS |
WOS研究方向 | Environmental Sciences & Ecology ; Public, Environmental & Occupational Health |
语种 | 英语 |
出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
WOS记录号 | WOS:000895344600009 |
资助机构 | National Natural Science Foundation of China ; Sichuan Science and Technology Program ; Belt and Road Master Fellowship Program |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/57066] |
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 | Yuhai, Bao |
作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, 9,Block 4,South Renmin Rd, Chengdu 610041, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China |
推荐引用方式 GB/T 7714 | Nsabimana, Gratien,Hong, Li,Yuhai, Bao,et al. Soil aggregate disintegration effects on soil erodibility in the water level fluctuation zone of the Three Gorges Reservoir, China[J]. ENVIRONMENTAL RESEARCH,2023,217:11. |
APA | Nsabimana, Gratien.,Hong, Li.,Yuhai, Bao.,Nambajimana, Jean de Dieu.,Jinlin, Li.,...&Xiubin, He.(2023).Soil aggregate disintegration effects on soil erodibility in the water level fluctuation zone of the Three Gorges Reservoir, China.ENVIRONMENTAL RESEARCH,217,11. |
MLA | Nsabimana, Gratien,et al."Soil aggregate disintegration effects on soil erodibility in the water level fluctuation zone of the Three Gorges Reservoir, China".ENVIRONMENTAL RESEARCH 217(2023):11. |
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