Quantifying the effects of rainfall intensity fluctuation on runoff and soil loss: From indicators to models
文献类型：期刊论文
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| 作者 | Liu, Jianbo; Liang, Yue ; Gao, Guangyao; Dunkerley, David; Fu, Bojie
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| 刊名 | JOURNAL OF HYDROLOGY
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| 出版日期 | 2022-04 |
| 卷号 | 607期号:0页码:127494 |
| ISSN号 | 0022-1694 |
| 关键词 | INTERRILL EROSION STORM VARIATIONS USLE-M INFILTRATION SIMULATION PATTERNS PLOTS |
| 英文摘要 | Rainfall represents the main driving force of runoff and soil erosion. Previous studies usually focused on the effects of general rainfall characteristics at event scale on runoff and soil erosion, but the effects of rainfall intensity fluctuation at intra-event scale, i.e., the temporal distribution of intensity bursts across the rainfall profile, have always been difficult to be characterized. In this study, the rainfall intensity profile was disaggregated into high-intensity zone and low-intensity zone using the average rainfall intensity as threshold, and a series of indicators were proposed to describe the features of rainfall intensity fluctuation. Field observations of runoff and soil loss in six grass-cover plots under natural rainfall conditions were conducted from 2011 to 2016 in the Loess Plateau of China. The main rainfall indicators influencing runoff coefficient (RC), sediment concentration (SC) and soil loss coefficient (SLC) were identified using the principal component analysis, and runoff and soil loss regression models were developed using data from 2011 to 2013 to predict RC, SC and SLC during 2014-2016. The results indicated that the natural rainfall events displayed strong intensity fluctuations (e.g., aggregation, intermittency, and variability), with approximate 78% of rainfall amount occurring in only 27% of rainfall duration. Most of the proposed rainfall intensity fluctuation indicators were significantly correlated with RC, SC and SLC (p < 0.05). The average intensity of rainfall peaks (I-ap) and rainfall duration of high-intensity zone (RDh) were the main variables to simulate RC, and the average intensity of high-intensity zone (I-ah) and relative amplitude of rainfall intensity (R-am) controlled SC and SLC. The models considering rainfall intensity fluctuation had good performances in predicting RC, SC and SLC with higher R-2 values (0.64 vs 0.46), lower RMSE values (0.66 vs 0.76) and higher NSE values (0.54 vs 0.42) compared to the models only considering general rainfall characteristics. The prediction accuracy of SLC was higher than that of RC and that of SC was lowest. These results gain an insight into the marked influence of rainfall intensity fluctuation in generating and predicting runoff and soil loss, and shed light on exploring rainfall-erosion relationships. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47319]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 通讯作者 | Gao, Guangyao |
| 作者单位 | 1.Tianjin Normal Univ, Tianjin Key Lab Water Resources & Environm, Tianjin 300387, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Monash Univ, Fac Sci, Sch Earth Atmosphere & Environm, Melbourne, Vic 3800, Australia 5.Natl Observat & Res Stn Earth Crit Zone Loess Pla, Xian 710061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Jianbo,Liang, Yue,Gao, Guangyao,et al. Quantifying the effects of rainfall intensity fluctuation on runoff and soil loss: From indicators to models, Quantifying the effects of rainfall intensity fluctuation on runoff and soil loss_ From indicators to models.pdf[J]. JOURNAL OF HYDROLOGY,2022,607(0):127494. |
| APA | Liu, Jianbo,Liang, Yue,Gao, Guangyao,Dunkerley, David,&Fu, Bojie.(2022).Quantifying the effects of rainfall intensity fluctuation on runoff and soil loss: From indicators to models.JOURNAL OF HYDROLOGY,607(0),127494. |
| MLA | Liu, Jianbo,et al."Quantifying the effects of rainfall intensity fluctuation on runoff and soil loss: From indicators to models".JOURNAL OF HYDROLOGY 607.0(2022):127494. |
入库方式： OAI收割
来源：生态环境研究中心
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