Precipitation-dependent sensitivity of suspended sediment concentration to turbidity in a mountainous river in southwestern China | |
Li, Hong1,2; Lv, Jiaorong2; He, Xiubin2; Bao, Yuhai2; Nsabimana, Gratien1,2 | |
刊名 | ECOLOGICAL INDICATORS |
2024-02-01 | |
卷号 | 159页码:10 |
关键词 | Turbidity Suspended sediment load Rainfall Soil erosion High mountain valley |
ISSN号 | 1470-160X |
DOI | 10.1016/j.ecolind.2024.111644 |
英文摘要 | Suspended sediment concentration (SSC) has been used as a key indicator in various environmental studies concerning, for example, ecological integrity, river morphology, aquatic and riverine biota, and the management of river and reservoir systems. River turbidity has been widely used as a proxy indicator of SSC. However, the relationship between the two parameters varies considerably under different conditions. The present study investigated the relationships between SSC and turbidity under different rainfall conditions in the Baisha River, a mountainous river located in southwestern China. Data were continuously collected on site from 2015 to 2021. The results showed a significant positive correlation between SSC and turbidity, with the median slope model exhibiting the best linear fit. In addition, the linear regression slopes varied significantly between different seasons and rainfall intensities in the following descending orders: dry season (1.05) > rainy season (0.97), no rainfall (1.14) > non-erosive rainfall (0.99) > erosive rainfall (0.95), and mild rainfall (1.05) > moderate rainfall (0.97) > heavy rainfall (0.93) > rainstorm (0.89). Overall, during the rainy season and under higher rainfall intensities, the regression slope was gentler. This study discussed the mechanisms through which rainfall conditions affected the SSC-turbidity relationship. It was shown that such a relationship was generally influenced by sediment transport in the runoff and river water flow flux, and the number of suspended particles as well as their size were considered as main factors. The results of this study revealed the impact of rainfall conditions on the SSC-turbidity relationship and provided a reference for the rapid assessment of the suspended sediment load in mountain river basins at high altitudes. In addition, based on the results obtained, it is expected that a new method for predicting event-based soil erosion can be applied in similar high -altitude mountain valleys. |
资助项目 | National Natural Science Founda- tion of China[U2040207] ; Sichuan Science and Technology Program[2022YFS0493] |
WOS关键词 | PARTICLE-SIZE DISTRIBUTION ; SOIL-EROSION ; BED-LOAD ; GRAIN-SIZE ; TRANSPORT ; INTENSITY ; SENSORS ; ESTUARY ; SLOPES ; SOLIDS |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:001176829700001 |
资助机构 | National Natural Science Founda- tion of China ; Sichuan Science and Technology Program |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/57936] |
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 | Lv, Jiaorong |
作者单位 | 1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Sichuan, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Hong,Lv, Jiaorong,He, Xiubin,et al. Precipitation-dependent sensitivity of suspended sediment concentration to turbidity in a mountainous river in southwestern China[J]. ECOLOGICAL INDICATORS,2024,159:10. |
APA | Li, Hong,Lv, Jiaorong,He, Xiubin,Bao, Yuhai,&Nsabimana, Gratien.(2024).Precipitation-dependent sensitivity of suspended sediment concentration to turbidity in a mountainous river in southwestern China.ECOLOGICAL INDICATORS,159,10. |
MLA | Li, Hong,et al."Precipitation-dependent sensitivity of suspended sediment concentration to turbidity in a mountainous river in southwestern China".ECOLOGICAL INDICATORS 159(2024):10. |
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