| 沙尘天气下输沙率的野外观测与分析 |
| |
| 引用本文： | 康永德,杨兴华,霍文,杨帆,何清,艾力.买买提明.沙尘天气下输沙率的野外观测与分析[J].新疆气象,2019,13(1):63-69. |
| |
| 作者姓名： | 康永德 杨兴华 霍文 杨帆 何清 艾力.买买提明 |
| |
| 作者单位： | 中国气象局乌鲁木齐沙漠气象研究所;新疆维吾尔自治区气象台 |
| |
| 基金项目： | 国家自然科学基金(批准号：41375163)资助； |
| |
| 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。
|
| 关 键 词： | 跃移 近地层 输沙率 塔克拉玛干沙漠 |
| 收稿时间： | 2017/6/20 0:00:00 |
| 修稿时间： | 2017/7/19 0:00:00 |
Field Observation Test of Sediment Transport Rate In Sand Dust Weather |
| |
| Kang Yongde,Yang Xinghu,Huo Wen,Yang Fan,He Qing and ALI.Mamtimin.Field Observation Test of Sediment Transport Rate In Sand Dust Weather[J].Bimonthly of Xinjiang Meteorology,2019,13(1):63-69. |
| |
| Authors: | Kang Yongde Yang Xinghu Huo Wen Yang Fan He Qing and ALIMamtimin |
| |
| Institution: | Institute of Desert Meteorology,China Meteorological Administration,Institute of Desert Meteorology,China Meteorological Administration,Institute of Desert Meteorology,China Meteorological Administration,Institute of Desert Meteorology,China Meteorological Administration,Institute of Desert Meteorology,China Meteorological Administration,Institute of Desert Meteorology,China Meteorological Administration |
| |
| Abstract: | using micro anemometer, gradient sand collector, from 2014.7 to 2014.8 in Tazhong area from 0 ~ 5mm, 5 ~ 15mm, 15 ~ 35mm and 35 ~ four 85mm height field data, research shows that: the 0-85mm layer, the total amount of sediment transport in the sand flow in. And with the increase of wind speed, close to the upper bed surface (35-85mm) both the absolute amount of sediment, the sediment is also relatively reduced. The transport rate of the highest values in the wind speed is about 8m.s-1, the fluctuation is obvious, the minimum value appeared at about 6.5m.s-1, the fluctuation is not obvious; when the wind speed is less than 8m.s-1. The influence of wind speed on the sediment transport rate of height is mainly in 0~35mm. Dust weather, transport rate of sand increases with wind speed increasing, mainly concentrated in the near surface layer of 0 ~35mm, but also between the layers fluctuated obviously, the maximum value appeared in 5~15mm, the minimum value appeared in 35~ 85mm high. When the wind velocity is greater than 9.2m.s-1, the maximum sediment transport rate is between 0 and 5mm. The variation trend of sediment transport rate at different height is similar to sand blowing weather, but the inflection point wind speed is 7.5m.s-1, and the sediment transport rate is not significant when it is less than 7.5m.s-1, which is greater than 7.5m.s-1, and the sediment transport rate increases significantly. A field experiment of the sediment transport rate data has not only theoretical significance, but also is the main basis to prevent reasonable mining, traffic facilities and residential areas were not affected by sand burial measures, which is a very important parameter of wind engineering in engineering design, has important practical significance. |
| |
| Keywords: | Saltation Near formation Sediment transport rate Taklimakan Desert |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《新疆气象》浏览原始摘要信息 |
| 点击此处可从《新疆气象》下载免费的PDF全文 |
|
