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地理科学 >

2008 , Vol. 28 >Issue 4: 507 - 512

DOI: https://doi.org/10.13249/j.cnki.sgs.2008.04.507

论文

海岸横向沙脊表面风沙流结构的野外观测研究

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  • 1. 中山大学地理科学与规划学院, 广东, 广州 510275;
    2. Department of Geography and Anthropology, Louisiana State University, USA
董玉祥(1964- ),男,河北西平人,博士,教授,主要从事海岸风沙地貌与土地沙漠化研究。 E-mail: eesdyx@mail.sysu.edu.cn

收稿日期: 2007-08-16

  修回日期: 2008-03-19

  网络出版日期: 2008-07-20

基金资助

国家自然科学基金项目(项目编号:40571019)资助。

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Field Measurements of Structure of Wind-sand flow on Coastal Transverse Ridge in China

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  • 1. School of Geography and Planning, Sun Yat-Sen University, Guangzhou, Guangdong 510275;
    2. Department of Geography and Anthropology, Louisiana State University, USA

Received date: 2007-08-16

  Revised date: 2008-03-19

  Online published: 2008-07-20

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摘要

选择中国规模最大、形态最为典型的河北昌黎黄金海岸的横向沙脊,采用野外梯度风速仪和平口式积沙仪对其顶部的风沙流结构进行了观测。观测结果表明,海岸横向沙脊表面的风沙流结构特征基本表现为0~40 cm高程内气流搬运的沙尘物质浓度或质量随高度递减并符合指数分布,20~60 cm高程内符合幂函数分布, 40~60 cm高程内输沙量与高度之间则为多项式函数关系。同时,海岸横向沙脊表面的风沙流结构受风速与总输沙量的影响较大,随风速增大或总输沙量的增加,风沙流下层输沙量相对减少、上层则相应增加。

本文引用格式

董玉祥, P A Hesp, S L Namikas, 马骏 . 海岸横向沙脊表面风沙流结构的野外观测研究[J]. 地理科学, 2008 , 28(4) : 507 -512 . DOI: 10.13249/j.cnki.sgs.2008.04.507

Abstract

On the typical coastal transverse ridge at Changli Gold Coast in Hebei Province, which is one of the most typical coastal Aeolian distribution regions in China and famous for the tall and typical coastal transverse ridges. Here, he structure of wind-sand flow on the top of coastal transverse ridge was measured by use of field vertical anemometer and sand trap. The field measurement results show that basic characteristic of the structure of wind-sand flow on the top of coastal transverse ridge is the sand transport rate in the wind-sand flow decreases quickly with height, which can be expressed by an exponential function at the height of 0-40cm, but which could be expressed by the power function at the height of 20-60cm and polynomial function at the height 40-60cm. The structure of wind-sand flow on the top of coastal transverse ridge has a close relationship with the wind velocity and total sand transport rate. The ratio of sand transport rate at low layer decreases and the ratio of sand transport rate at high layer increases with the increase of wind velocity and total sand transport rate.

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