%0 Journal Article
%T Wind Tunnel Experiments on the Deflation Rates of Different Sediments in Arid Regions of China<br>中国干旱区不同成因沉积物吹蚀速率的实验研究
%A LIU Lianyou
%A SONG Yang
%A LI Xiaoyan
%A WANG Jianhua
%A TUO Wanquan
%A LIU Yuzhang
%A <br>刘连友
%A 宋阳
%A 李小雁
%A 王建华
%A 拓万权
%A 刘玉璋
%J 地理学报
%D 2006
%I 
%X By the wind tunnel experiment,we studied the deflation rates of 8 different sediments in arid regions of China,discussed the sources of aeolian sand and its influence on the development of sand dunes and formation of desert from the view of dynamics of wind erosion.Results of the study indicated that the average deflation rates of 8 typical sediments in arid regions of China can be arranged down: lacustrine sand > alluvial sand > weathered particles developed from sandshale > pluvial sediments > fluvioglacial sand > weathered particles developed from granite > slope deposit > glacial sediments.The deflation rates exhibited strong positive correlations with the erodible fraction-sand(0.063-2mm) content and sorting features.In contrast,the deflation rates have obvious negative correlations with the silt clay(< 0.063 mm) and gravel(> 2 mm) content.According to the deflation rates,the 8 typical sediments can be divided into four categories:(1) lacustrine sand and alluvial sand,which are prone to wind erosion,and are the main sources of aeolian sand;(2) weathered particles developed from sandshale,pluvial sediments and fluvioglacial sand,with the larger deflation rates,being the minor source of aeolian sand;(3) weathered particles developed from granite and slope deposit having the smaller deflation rates,only providing a small amount of aeolian sand;and(4) glacial sediments with a strong anti-erodibility,hardly offering any aeolian sand.Other than the strong wind conditions,the exposure of extensive lacustrine sand induced by the desiccation of inland lake basin,as well as the pre-sorting of sediments by flowing water are key factors in the development of deserts in China.It is the possible reason that deserts in China are mostly distributed along the inland lake basin and riverbank in a material light.
%K China
%K arid regions
%K sediments
%K wind tunnel experiment
%K deflation rate
%K sorting features<br>中国
%K 干旱区
%K 沉积物
%K 风洞实验
%K 吹蚀速率
%K 分选性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=F7B5B947C24B9D649491012214E4BEF4&aid=32CA278AC1849BFF&yid=37904DC365DD7266&vid=1D0FA33DA02ABACD&iid=9CF7A0430CBB2DFD&sid=158793AD8125C377&eid=5357CC5E80802025&journal_id=0375-5444&journal_name=地理学报&referenced_num=0&reference_num=32