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中国沙漠 ›› 2020, Vol. 40 ›› Issue (6): 33-42.DOI: 10.7522/j.issn.1000-694X.2020.00062

• • 上一篇    下一篇

3类集沙仪野外测试对比

刘箴言1(), 常春平1(), 郭中领1, 李继锋1, 王仁德2, 李庆2, 黄亚鹏1, 李旭1, 刘珺1, 苏振生3   

  1. 1.河北师范大学 资源与环境科学学院/河北省环境演变与生态建设省级重点实验室,河北 石家庄 050024
    2.河北省科学院 地理科学研究所/河北省地理信息开发应用工程技术研究中心,河北 石家庄 050011
    3.河北师范大学附属民族学院,河北 石家庄 050091
  • 收稿日期:2020-02-11 修回日期:2020-06-05 出版日期:2020-12-09 发布日期:2020-12-09
  • 通讯作者: 常春平
  • 作者简介:常春平(E-mail: ccp690708@hebtu.edu.cn
    刘箴言(1996-),男,河北石家庄人,硕士研究生,主要从事土壤风蚀研究。E-mail: 458465960@qq.com
  • 基金资助:
    国家自然科学基金项目(41877066);河北省自然科学基金项目(D2018205192);河北省普通高等学校青年拔尖人才项目(BJ2016030)

A comparative study on field test of sand collectors

Zhenyan Liu1(), Chunping Chang1(), Zhongling Guo1, Jifeng Li1, Rende Wang2, Qing Li2, Yapeng Huang1, Xu Li1, Jun Liu1, Zhensheng Su3   

  1. 1.College of Resource and Environment Sciences / Hebei Key Laboratory of Environmental Change and Ecological Construction,Hebei Normal University,Shijiazhuang 050024,China
    2.Institute of Geographical Sciences / Hebei Engineering Research Center for Geographic Information Application,Heibei Academy of Sciences,Shijiazhuang 050011,China
    3.Affiliated Nationalities College of Hebei Normal University,Shijiazhuang 050091,China
  • Received:2020-02-11 Revised:2020-06-05 Online:2020-12-09 Published:2020-12-09
  • Contact: Chunping Chang

摘要:

通过对比新型平口式集沙仪(New Flat Opening Collector,NFOC)、BSNE(Big Spring Number Eight)集沙仪、MWAC(Modified Wilson and Cook)集沙仪在同一风蚀事件中的观测结果,分析BSNE、MWAC、NFOC集沙仪在定向、非定向状态下输沙率变化特征,探究平均风速、摩阻风速和湍流结构变化对风沙活动的影响。结果表明:定向集沙仪输沙率明显低于非定向集沙仪,BSNE和NFOC集沙仪输沙率均大于MWAC集沙仪,但MWAC集沙仪输沙率与平均风速以及摩阻风速的相关性最优。短时间尺度的湍流活动对输移量影响甚微,却对MWAC集沙仪的定向与非定向输沙率差异存在一定影响。Kawamura模型(0.140<RMSE<0.760)对风蚀事件的预测值与区域地块的实测值更接近,能够相对准确地反映该地区风蚀状况,但这一结论仍需进一步深入探讨。

关键词: 风蚀事件, 集沙仪, 输沙率, 风蚀预测模型

Abstract:

By comparing the observation results of BSNE, MWAC and NFOC sand collectors in the same wind erosion events, we analyzed the characteristics of sediment transport rate in the directional and non-directional state of different types of sand collectors, and explored the effect on wind erosion about average wind speed, friction speed and turbulent structure. The results show that the sediment transport rate of the directional sand collector is obviously lower than that the non-direction sand collector, and the sediment transport rate of both BSNE and NFOC collectors is higher than that of MWAC collectors, but the correlation with wind speed is worse than MWAC collectors. Turbulence on short-time scale has little effect on the amount of sand sediments but has some effect on the sediment transport rate of directional and non-directional about MWAC collectors. By comparing the measured values of various sand collectors and the predicted values of various models, it is shown that the Kawamura model (0.140<RMSE<0.760) is closer to the measured values during the wind erosion events, and can reflect the wind erosion conditions in the region accurately. However, this conclusion still needs to be further discussed.

Key words: wind erosion events, sand collector, sediment transport rate, wind erosion model

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