摘要
基于黄河中游河口-龙门区间实地考察和对1964—1989年的实测资料进行时空变化分析,结果发现:该区水力、风力变化对河流产出的粗泥沙的量和质的变化具有一定的分异控制作用,水力对河流的输沙量的变化起主导作用,而风力对粗泥沙占全沙的百分比变化起主导作用。随着降雨量的减少和风沙活动的减弱,黄河中游河流输沙量和粗沙比有不同程度的减少,输沙量减少明显,减沙比在50%～70%之间,而粗沙比的变化要小得多,减少量在10%～20%之间。
Based on the field survey and analysis of the temporal and spatial variations of aeolian activities,precipitation,sediment yield and percentage of coarse sands （PCS） of entire sediment yield in 11 middle branches of the Yellow River,China,from 1964 to 1989,this study indicates that aeolian and fluvial variations have differentiation and control on the variations of quantity and granulometric composition of coarse sands flux in the middle Yellow River.Fluvial actions play leading role in variations of sediment yield,while aeolian actions exert significant impact on variations of PCS.With the decrease of precipitation and aeolian actions,the sediment yield and percentage of coarse sands decrease on different degree,the percentage of decrease in sediment yield is 50%～70%,which is much higher than that of PCS,about 10%～20%.
出处
《水土保持学报》
CSCD
北大核心
2010年第2期25-29,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金(406710l9)
关键词
风水两相作用
黄河中游
粗泥沙
aeolian-fluvial interaction
the middle Yellow River
coarse sands
