水土保持研究2025，Vol.32Issue(4)：1-10,10.DOI:10.13869/j.cnki.rswc.2025.04.004
基于径流小区实测数据的江苏省土壤可蚀性因子变异特征
Variation characteristics of soil erodibility factor in Jiangsu Province based on measured data from runoff plots
摘要
Abstract
[Objective]This study aims to reveal the variation characteristics of soil erodibility(K value)at different monitoring sites in Jiangsu Province,providing a basis for enhancing the accuracy of soil erosion prediction.[Methods]By collecting monitoring data from 7 soil and water conservation monitoring sites in Jiangsu Province from 2022 to 2023,the measured K values for bare land runoff plots were obtained.The variation of K values was analyzed both among different sites and within the same site,and the main factors driving the variability were identified.[Results](1)The annual average K values at monitoring sites in Jiangsu Province ranged from 0.0012 to 0.0261 t·hm2·h/(hm2·MJ·mm),and their variation was significantly related to soil sand and silt content.(2)At sites where changes in rainfall erosivity dominated,the annual soil erodibility(Ky)showed that K2022>K2023.At sites dominated by changes in soil loss,K2022<K2023.At sites where rainfall erosivity and soil loss varied synchronously,the Ky variation was minimal,with K2022≈K2023.(3)At most monitoring sites,the monthly soil erodibility(Km)showed higher values in the rainy season and lower values in the dry season.However,the Km in Taizhou Gaogang site showed the oppsite trend,which was related to the high rainfall erosivity but low soil loss in the rainy season,and low rainfall erosivity but high soil loss in the dry season.[Conclusion]The variation of K values among different monitoring sites is significantly associated with soil sand and silt contents,and the relationship between changes in rainfall erosivity and soil loss leads to variations of K values both annually and seasonally.关键词
土壤可蚀性/变异特征/径流小区/降雨侵蚀力/土壤流失量Key words
soil erodibility/variation characteristic/runoff plot/rainfall erosivity/soil loss分类
农业科学引用本文复制引用
武逸杭,田芷源,周璐,郭红丽,吴芳,梁音..基于径流小区实测数据的江苏省土壤可蚀性因子变异特征[J].水土保持研究,2025,32(4):1-10,10.基金项目
江苏省水利科技项目"江苏省水土流失动态监测土壤可蚀性因子研究"(2022045) （2022045）
