摘要
2014年7月—2014年8月借助风速仪、微梯度集沙仪,通过野外监测系统获取的试验数据,对塔中地区2014年7月—2014年8月沙尘天气过程中贴地层输沙率进行分析,得出:0～85 mm高度内,随着风速的增大,35～85 mm无论是绝对的输沙量还是相对的输沙量都减少。0～85 mm高度内,各层输沙率最大值均出现在风速为8 m·s-1左右,波动较为显著;最小值出现在6.5 m·s-1左右,波动不明显;沙尘天气中,输沙率最大值出现在5～15 mm高度,最小值出现在35～85 mm高度。扬沙天气中,风速>9.2 m·s-1时,输沙率最大值在0～5 mm处。沙尘暴天气,拐点风速为7.5 m·s-1,<7.5 m·s-1时,输沙率增加不显著,>7.5 m·s-1时,输沙率增加显著。通过微梯度集沙仪获得的上述试验数据是风沙工程设计的一个极重要工程参数,具有重要的实践意义。
We made continuous observation experiments of the sediment transport rate in Tazhong district,which is in the Taklamakan Desert hinterland.We analyzed the movement rules in the conditions of the different wind speed in the typical weather.The experiments were done by using H11-sensit wind sensor,anemometer,and micro-gradient sand sampler from July to August in 2014.The results showed that:In the height of 0~85 mm,with the increase of wind speed,the absolute sediment transport volume and relative sediment transport volume of 35~85 mm are reduced.In the height of 0~85 mm,the maximum sediment transport rate in each layer appears at a wind speed of 8 m·s^-1,and the fluctuation is more significant;the minimum value appears at 6.5 m·s^-1,and the fluctuation is not obvious.In the dusty weather,the maximum sand rate occurs at a height of 5 to 15 mm,and the minimum value appears at a height of 35 to 85 mm.In the sand blowing weather,when the wind speed is greater than 9.2 m·s^-1,the maximum sediment transport rate is 0~5 mm.In the sandstorm weather,the wind speed at the inflection point is 7.5 m·s^-1,and when the wind speed is less than 7.5 m·s^-1,the sediment transport rate increases not significantly,and the sediment transport rate increases significantly when the wind speed is more than 7.5 m·s^-1.The above test data obtained by the micro-gradient sand collector is a very important engineering parameter for the design of windblown sand engineering,and has important practical significance.
作者
康永德
杨兴华
霍文
杨帆
何清
买买提艾力.买买提依明
KANG Yongde;YANG Xinghua;HUO Wen;YANG Fan;HE Qing;Mamatali Mamtimin(Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,China;Xinjiang Meteorological observatory, Urumqi 830002,China)
出处
《沙漠与绿洲气象》
2019年第1期63-69,共7页
Desert and Oasis Meteorology
基金
国家自然科学基金项目(41875019)
国家自然科学基金(41375163)
2017自治区柔性人才引进项目(2017)共同资助
关键词
跃移
近地层
输沙率
塔克拉玛干沙漠
saltation
near formation
sediment transport rate
Taklimakan Desert
