摘要
为了研究鄱阳湖流域3种典型母质对土壤溅蚀的影响,设计一种可收集过程样的溅蚀盘,通过室内模拟降雨试验,分析不同降雨强度(30,60,90,120,150 mm/h)和母质(第四纪沉积物母质、花岗岩母质、红砂岩母质)条件下红壤溅蚀特征。结果表明:第四纪沉积物母质红壤总溅蚀量最低,其次是花岗岩母质红壤,红砂岩母质红壤总溅蚀量最高,土壤质地、有机质、游离氧化铁等指标对总溅蚀量影响较大;随着雨强的增大,总溅蚀量呈对数函数关系增加;总溅蚀量80%以上分布在0—15 cm范围内,随着雨强增大,溅蚀颗粒分布越集中。
A process-collectable splash erosion plate was designed to analyze the impacts of parent materials on splash erosion in the Poyang lake basin.The simulated rainfall experiments were conducted with five rainfall intensities (30,60,90,120,150 mm/h) in this paper.The splash erosion features of red soils were studied under different parent materials including quaternary sediments (SQ),granite (SG) and red sandstone (SR),respectively.The results showed that the total splash erosion differed significantly between parent materials.SR was more sensitive to the rain drop and generated the highest splash erosion,but the value of SQ was the lowest.Soil texture,organic matter and free iron oxide were more effective to the splash erosion.The total splash erosion increased logarithmically with the increased rainfall intensities.Over 80% of the splash sediments were distributed within the distance of 15 cm,the more concentratedly with the higher rainfall intensities.
作者
刘窑军
杨广勇
徐铭泽
汤崇军
杨洁
LIU Yaojun;YANG Guangyong;XU Mingze;TANG Chongjun;YANG Jie(Jiangxi Provincial Institute of Soil and Water Conservation,Nanchang 330029;Soil and Water Research Center of Huazhong Agriculture University,Wuhan 430070;College of Forestry,Jiangxi Agricultural University,Nanchang 330045)
出处
《水土保持学报》
CSCD
北大核心
2019年第2期55-59,67,共6页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目(41877084
41501287
41501289)
江西省水利科技项目(KT201417
KT201522)
中国博士后科学基金项目(2018M632597)
关键词
土壤母质
红壤
溅蚀
模拟降雨
parent material
red soil
splash erosion
rainfall simulation
