Objective The precision of using coupled prediction models in quantifying microtopographic soil loss was evaluated for varying slopes, rainfall intensities, temporal scales, and surface treatments in order to provide scientific referrences for microtopographic soil loss prediction. Methods The microtopography of bare loess slopes was studied. The soil conservation service curve number (SCS-CN) model was modified according to measured surface runoff (QT ) and surface roughness (SR) values for predicting runoff volume. The modified model was then coupled to the revised universal soil loss equation (MUSLE) for predicting soil erosion. Results ① The modified models, SCS-Q (using CN values back-calculated from QT ) and SCS-SR (modified via SR), predicted runoff (QCN and QSR, respectively) with R² values of 0.933 8 and 0.769 1, respectively. The developed models were more accurate by 32% and 9%, respectively, than the original SCS-CN model, which predicted runoff, QO, with an R² of 0.705 6. ② The coupled models produced more accurate microtopographic erosion predictions than the RUSLE models. The MUSLE-SR model (combining SCS-SR with MUSLE) was more accurate (NSE ∈ [0.50, 0.94]) than the MUSLE-Q model (combining SCS-Q with MUSLE) (NSE ∈ [0.23, 0.94]). ③ During the microtopographic soil loss prediction, the surface measures more strongly affected the microtopographic erosion prediction accuracy of the coupled model (ΔNSE=63%) than the rainfall intensity (ΔNSE=52%) or slope (ΔNSE=40%). Conclusion The microtopographic soil erosion prediction accuracy of the coupled models considerably increased with rainfall duration: accuracy was low in the first 20 min of rainfall (R²<0.5) but markedly increased after 20 min (R²>0.8).
文献参数: 屈加琪, 饶文利, 任凡斐, 等.基于SCS-CN与MUSLE模型耦合的微地形侵蚀预测[J].水土保持通报,2025,45(5):81-90. Citation:Qu Jiaqi, Rao Wenli, Ren Fanfei, et al. Predicting microtopography erosion by coupling SCS-CN and MUSLE models [J]. Bulletin of Soil and Water Conservation,2025,45(5):81-90.
Standardization Administration of the People’s Republic of China. Terminology of soil and water conservation: GB/T 20465—2006 [S]. Beijing: Standards Press of China, 2006.
LiMingwei. Estimating soil erosion under different soil and water conservation engineering measures using LSTM model: A case study in northwest Liaoning Province [J]. Bulletin of Soil and Water Conservation, 2023,43(4):162-169.
[5]
RaoWenli, ZhangQingfeng, ZhangFengbao, et al. An overview of water erosion modeling in China: A bibliometric and statistical analysis [J]. Frontiers of Agricultural Science and Engineering, 2025,12(2):337-354.
ZhaoLongshan. Laboratory study on soil surface roughness effect on soil infiltration, runoff and sediment production at the loess hillslope [D]. Yangling, Shaanxi: Northwest A&F University, 2015.
[8]
BahddouS, OttenW, WhalleyW R, et al. Changes in soil surface properties under simulated rainfall and the effect of surface roughness on runoff, infiltration and soil loss [J]. Geoderma, 2023,431:116341.
[9]
韩克秋.基于地形因子的北票市水土流失特征分析[J].水土保持应用技术,2025(3):13-15.
[10]
HanKeqiu. Analysis of soil and water loss characteristics in Beipiao City based on topographic factors [J]. Technology of Soil and Water Conservation, 2025(3):13-15.
TangHui, LiZhanbin, LiPeng, et al. Surface micro topography quantification and its relationship with runoff and sediment under simulated rainfall [J]. Transactions of the Chinese Society of Agricultural Engineering, 2015,31(24):127-133.
ZhouQingzi, HeZili, WuLei, et al. Deep learning runoff prediction model based on multi-source data fusion [J]. Journal of Hydroelectric Engineering, 2023,42(5):43-52.
MaQiumei, GuiXu, XiongLihua, et al. Impact of climate change on the sensitivity and uncertainty of HBV hydrologic model parameters [J]. Advances in Water Science, 2024,35(4):556-568.
[17]
NeumannA, DongFeifei, ShimodaY, et al. A review of the current state of process-based and data-driven modelling: Guidelines for Lake Erie managers and watershed modellers [J]. Environmental Reviews, 2021,29(4):443-490.
LiJinmei, ZhouJingchun, WangJinliang. Optimization of SCS-CN model in a mountainous area on west bank of Dianchi Lake [J]. Bulletin of Soil and Water Conservation, 2023,43(3):139-147.
GaoYang, ZhuBo, MiaoChiyuan, et al. Application of SCS model to estimate the volume of rainfall runoff in sloping field of purple soil [J]. Chinese Agricultural Science Bulletin, 2006,22(11):396-400.
[22]
冯家伟.微地形条件下典型径流及产沙模型应用研究[D].四川 雅安: 四川农业大学,2023.
[23]
FengJiawei. Study on typical runoff model and soil erosion prediction model under microrelief conditions [D]. Yaan, Sichuan: Sichuan Agricultural University, 2023.
ZhangXin, ZhangQingfeng, ZhouYangyang, et al. SCS-CN parameter determination using rainfall-runoff data on microtopographic surfaces of different gradient loess slopes [J]. Research of Soil and Water Conservation, 2019,26(2):74-77.
[26]
ShiWenhai, BaoJiachi, WangMiaomiao, et al. A modified CSLE for soil loss prediction under different vegetation patterns at slope scale in China [J/OL] (2025-06-22). International Soil and Water Conservation Research,
[27]
WangJing, LuPingda, ValenteD, et al. Analysis of soil erosion characteristics in small watershed of the loess tableland Plateau of China [J]. Ecological Indicators, 2022,137:108765.
[28]
GaoGuangyao, LiangYue, LiuJianbo, et al. A modified RUSLE model to simulate soil erosion under different ecological restoration types in the loess hilly area [J]. International Soil and Water Conservation Research, 2024,12(2):258-266.
LvMingquan, WuShengjun, WenZhaofei, et al. Modelling soil erosion and sediment yield in a small watershed of Three Gorges Reservoir area based on SCS-CN and MUSLE model [J]. Resources and Environment in the Yangtze Basin, 2015,24(5):860-867.
[31]
WangLihong, LiYuechen, GanYushi, et al. Rainfall erosivity index for monitoring global soil erosion [J]. Catena, 2024,234:107593.
ChenHong, JiangXucong, RenLei, et al. Quantitative evaluation of soil erosion in the Huaihe River basin based on RUSLE model [J]. Chinese Journal of Soil Science, 2021,52(1):165-176.
HuangJie, YaoZhihong, ZhaShaoxiang, et al. Progress of study on soil and water conservation measure factors in USLE/RUSLE [J]. Soil and Water Conservation in China, 2020(3):37-39.
[38]
LufafaA, TenywaM M, IsabiryeM, et al. Prediction of soil erosion in a Lake Victoria basin catchment using a GIS-based universal soil loss model [J]. Agricultural Systems, 2003,76(3):883-894.
[39]
LiuJianbo, LiangYue, GaoGuangyao, et al. Quantifying the effects of rainfall intensity fluctuation on runoff and soil loss:From indicators to models [J]. Journal of Hydrology, 2022,607:127494.
[40]
WilliamsJ R, BerndtH D. Sediment yield prediction based on watershed hydrology [J]. Transactions of the ASAE, 1977,20(6):1100-1104.
[41]
吕鹏.基于SCS-CN模型的临桂地区地表径流预测研究[D].广西 桂林: 桂林理工大学,2024.
[42]
LvPeng. Prediction of surface runoff in Lingui area based on SCS-CN model [D]. Guilin, Guangxi: Guilin University of Technology, 2024.
TanQingfang, ChenFengting, HuangYuhan, et al. Change of rill erosion microtopography on saturated loess slope and its response to hydraulic parameters [J/OL] (2024-12-05). Acta Pedologica Sinica,
[45]
ShiDongmei, JiangGuangyi, PengXudong, et al. Relationship between the periodicity of soil and water loss and erosion-sensitive periods based on temporal distributions of rainfall erosivity in the Three Gorges Reservoir Region, China [J]. Catena, 2021,202:105268.
MingJunnan, WangQuanquan, YuanZaijian, et al. Characteristics of slope erosion on typical lateritic slope farmland in northern Guangdong Province based on artificially simulated rainfall experiments [J]. Journal of Soil and Water Conservation, 2025,39(3):88-96.
DongXiaoyu, QinFucang, LiLong, et al. Relationship between surface roughness and hydraulic erosion characteristic parameters during slope erosion in exposed Pisha sandstone area [J]. Journal of Soil and Water Conservation, 2022,36(2):33-41.
LiuZhuangzhuang, HeJijun, DuanGuangyao, et al. Study on the particle characteristic of slope erosion sediment on loess under varied rainfall-slope conditions [J/OL] (2025-04-28). Acta Ecologica Sinica,
GuoTianlei, MeiXue, RenShunhua, et al. Response of runoff and sediment yield on purple soil spoil heaps to slope and rainfall intensity [J]. Research of Soil and Water Conservation, 2025,32(4):11-17.
LiaoJun, JiaoJuying, YanZeng, et al. Simulation effect analysis of RUSLE model on slope soil erosion restored by reclaimed vegetation in Loess Plateau [J]. Journal of Soil and Water Conservation, 2024,38(2):97-108.