水土保持研究2025，Vol.32Issue(3)：1-7,7.DOI:10.13869/j.cnki.rswc.2025.03.016
赣江支流锦江流域日降雨侵蚀力模型建立及应用
Modeling and application of daily rainfall erosivity in Jinjiang River Basin,a tributary of the Ganjiang River
摘要
Abstract
[Objective]This study aims to explore the dominant rainfall patterns influencing the rainfall erosivity in the Jinjiang River Basin,a tributary of the Ganjiang River,and construct an estimation model for daily rainfall erosivity to identify its spatiotemporal distribution characteristics,providing data support for mitigating potential soil erosion risks and ensuring sustainable development of regional ecological security.[Methods]Based on the 5 minutes rainfall data from 2021,the rainfall characteristics of the Jinjiang River Basin for that year were revealed.A daily rainfall erosivity model tailored to the study area was constructed,evaluated against other models,and deviations were quantified.Subsequently,long-term data series were applied to analyze the spatial and temporal heterogeneity of the R-factor in the basin.[Results](1)In 2021,rainfall in the study area was mainly light to moderate,but heavy rainfall and storms were the primary sources of total rainfall.Rainfall erosivity was concentrated from March to August,aligning with the distribution time of intense rainfall events;(2)The model calibration indicators showed that the MAPE values ranged from 0.07 to 0.21,RMSE ranged from 170.55 to 689.38,MBE ranged from-191.02 to 136.62,and NSE ranged from 0.47 to 0.90.The indicators for each month showed the best results,verifying the superiority of the model in the study area;(3)The R-factor in the basin was above 7 000 MJ·mm/(hm2·h·a),indicating that the rainfall conditions in the region have a significant potential impact on soil erosion.Erosive forces generated by heavy rainfall and storms contributed 57%to 70%of the total erosivity.[Conclusion]Intense rainfall within the basin was the primary cause of high rainfall erosivity.The multi-year average rainfall erosivity was concentrated in the northwestern part of the region.When designing and implementing soil and water conservation measures,special consideration must be given to response plans for such rainfall events.关键词
降雨侵蚀力/次降雨/估算模型Key words
rainfall erosivity/single rainfall/estimation model分类
农业科技引用本文复制引用
陈新如,刘惠英,张佳芯,李益朋,江笑成..赣江支流锦江流域日降雨侵蚀力模型建立及应用[J].水土保持研究,2025,32(3):1-7,7.基金项目
2023年度江西省科学教育学会在校研究生课题(2023KXJYS010) （2023KXJYS010）
南昌工程学院2023大学生创新创业训练计划立项项目(2023094) （2023094）
南昌工程学院2024大学生创新创业训练计划立项项目(2024146) （2024146）
