Influence of reservoir impoundment on rainfall erosivity in the Three Gorges Reservoir region of China
文献类型:期刊论文
作者 | Jiang, Guangyi2,3; Lv, Jiaorong1,3; He, Xiubin3; Bao, Yuhai3 |
刊名 | HYDROLOGY RESEARCH |
出版日期 | 2022-10-20 |
页码 | 16 |
ISSN号 | 1998-9563 |
关键词 | extreme precipitation impoundment rainfall erosivity temporal variation Three Gorges Reservoir |
DOI | 10.2166/nh.2022.038 |
英文摘要 | New dammed reservoirs are expected to have a significant effect on the regional hydrocycle, but the detailed patterns may not be well understood. Regional climate change is likely to cause soil erosion uncertainty by affecting rainfall erosivity. In the present study, local precipitation and rainfall erosivity were investigated to determine the impounding influence of the Three Gorges Reservoir. Daily erosive precipitation, from 1980 to 2020, was categorized into four intensity levels (light, moderate, heavy, and very heavy), as well as extreme rainfall, to understand their contribution to erosivity. It was found that the impoundment significantly affected local precipitation, with both heavy precipitation and the relative erosivity showing a substantial declining trend (Sen's slope = 2.141, p < 0.05). The Mann-Kendall test indicated an abrupt change point around the year 2002, evidencing the effect of the reservoir impoundment (since 2003). Reservoir impoundment redistributed the intensity levels of erosive precipitation, leading to a 24.3% decrease in the erosivity of heavy precipitation and an 8.2% increase in the moderate category. The unimodal distribution of monthly precipitation was altered to a bimodal distribution with peaks in July and September, resulting in a longer but lower-risky erosion period of high concern. The fluctuations of Rx1day and Rx5day were obviously flattered after impoundment, with a 54.2% peak reduction in relative erosivity on average. Results indicated that heavy rainfall (including extreme rainfall) was reduced, and annual precipitation and erosivity both had a more even seasonal distribution following reservoir impoundment. |
WOS关键词 | EXTREME PRECIPITATION ; AREA ; DAM ; TRENDS ; IMPACT |
资助项目 | Natural Science Foundation of China[U2040207] ; Sichuan Science and Technology Program[2020YFQ0002/2022YFS0493] |
WOS研究方向 | Water Resources |
语种 | 英语 |
出版者 | IWA PUBLISHING |
WOS记录号 | WOS:000870715800001 |
资助机构 | Natural Science Foundation of China ; Sichuan Science and Technology Program |
源URL | [http://ir.imde.ac.cn/handle/131551/56914] |
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 | 1.9,4th Sect,South Renmin Rd, Chengdu, Sichuan, Peoples R China 2.Chongqing Ecoenvironm Monitoring Stn Soil & Water, Chongqing 401147, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu, Sichuan, Peoples R China |
推荐引用方式 GB/T 7714 | Jiang, Guangyi,Lv, Jiaorong,He, Xiubin,et al. Influence of reservoir impoundment on rainfall erosivity in the Three Gorges Reservoir region of China[J]. HYDROLOGY RESEARCH,2022:16. |
APA | Jiang, Guangyi,Lv, Jiaorong,He, Xiubin,&Bao, Yuhai.(2022).Influence of reservoir impoundment on rainfall erosivity in the Three Gorges Reservoir region of China.HYDROLOGY RESEARCH,16. |
MLA | Jiang, Guangyi,et al."Influence of reservoir impoundment on rainfall erosivity in the Three Gorges Reservoir region of China".HYDROLOGY RESEARCH (2022):16. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
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