水土保持学报2012，Vol.26Issue(3)：22-25,29,5.
利用风洞实验研究~7Be示踪估算土壤风蚀速率的可行性
Wind Tunnel Feasibility Study on Using 7Be Technique to Estimate Soil Wind Erosion Rate
摘要
Abstract
In this study,sandy loess from the wind-water erosion crisscross region on the Loess Plateau of China was used in wind tunnel to test the feasibility of using 7Be technique to estimate wind erosion rate.Since wind erosion selectively removes finer particles of soil,the direct use of 7Be-based water erosion model tends to overestimate wind erosion rate as 7Be is preferentially associated with the fine particles.The results showed an exponential function relationship between Se/So and the concentration of 7Be at the eroded site（Se and So are the specific surface areas of eroded soil and the original soil,respectively）.Thus,a particle size correction factor（P） was incorporated into the 7Be-based water erosion model.The wind erosion rates calculated by the corrected model were within 5% error compared with the measured values,indicating that the corrected model estimates wind erosion rate fairly accurately and that the 7Be technique could be used to estimate wind erosion rate.This study laid a foundation for further utilizing 7Be technique to investigate wind erosion in the wind-water erosion crisscross region on the Loess Plateau of China.关键词
风洞实验/7Be/风蚀/风蚀速率/修正模型Key words
wind tunnel test/beryllium-7/wind erosion/wind erosion rate/corrected model分类
农业科技引用本文复制引用
孙喜军,杨明义,张风宝,张博,赵恬茵..利用风洞实验研究~7Be示踪估算土壤风蚀速率的可行性[J].水土保持学报,2012,26(3):22-25,29,5.基金项目
国家自然科学基金项目 （）
中国科学院知识创新工程重要方向项目 （）
