摘要
集沙仪是定量监测风沙活动的重要工具。设计了一种自动连续称重式集沙仪,可以根据试验需要采集不同高度沙样,每分钟收集一次质量数据,实现高频连续集沙。试验结果显示,自动连续称重式集沙仪在15、30、60 cm高度的集沙量满足随高度增加呈指数减少的规律;在15 cm高度,风速与输沙通量呈指数函数关系(y=6E-05·e0.8417x,R2=0.6042),随集沙高度升高输沙通量与风速相关性减弱。自动连续称重式集沙仪与新型平口式集沙仪所测的输沙通量具有很好的一致性(y=0.8119x+0.2645,R2=0.7481)。自动连续称重式集沙仪虽然在稳固性方面需要改良,但能够很好地捕捉高度在15 cm以下沙物质的输移信息,野外应用效果良好,是一种适合野外高精度风沙活动自动监测的新型测量工具。
Sand collectoris important to quantitatively monitor aeolian sand activities.In this research,a cyclone type continuous-weigh sand trap was designed.This sand trap was further investigated for farmland environment during a storm in the Kangbao County of the agro-pastoral ecotone of northern China. The results showed that the cumulative sediments weights of the cyclone type continuous-weighing sand trap at heights of 15,30,and 60cm exponentially decreased with the increase of collecting heights.Significant exponential relationship between the sediment flux and wind speed was observed for the inlet at the height of 15cm (y=6E-05-e^0.8417x,R^2=0.6042),but the correlation coefficients between sediment flux and wind speed decreased with the increase of the inlet height.Comparison of the sediments flux measured by the cyclone type continuous-weighing sand trap and that by the new flat opening collector showed that sediments flux of the new flat opening collector were closely related to that of the cyclone type continuous-weighing sand trap's (y =0.8119x+0.2645,R^2=0.7481).Although the cyclone type con- tinuous-weighing sand trap requires improvement m stability,it is able to capture the aeolian sand flux below 15cm at lmin time scale.
作者
崔雅臻
郭中领
常春平
王仁德
李继峰
Cui Yazhen;Guo Zhongling;Chang Chunping;Wang Rende;Li Jifeng(College of Resource and Environment Sciences/Hebei Key Laboratory of Environment Change and Ecological Construction,Hebei Normal University,Shijiazhuang 050024,China;Institute of Geographical Sciences/Hebei Engineering Research Center for Geographic Information,Hebei Academy of Sciences,Shijiazhuang 050011,China)
出处
《中国沙漠》
CSCD
北大核心
2018年第6期1166-1174,共9页
Journal of Desert Research
基金
国家自然科学基金项目(41877066
41330746)
河北省自然科学基金项目(D2018205192
D2018205212)
河北省普通高等学校青年拔尖人才计划项目(BJ2016030)
关键词
风蚀
自动连续称重式集沙仪
新型平口式集沙仪
野外试验
wind erosion
cyclone type continuous-weighing sand trap
new flat opening collector
field use
