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| Characteristics of Grain Size of Modern Aeolian Sand and Beach Sand in coast of South China |
| Tang Li1,2, Dong Yuxiang1 |
1. School of Geography and Planning/Guangdong Key Laboratory for Urbanization and Geo-simulation, Sun Yat-Sen University, Guangzhou 510275, China;
2. School of Teacher Training, Guangzhou University, Guangzhou 510405, China |
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Abstract Based on the data of grain size of 141 modern aeolian sand samples and 70 beach sand samples located in the southern Fujian coast, eastern Guangdong coast, western Guangdong coast and Hainan island coast, which are the typical coastal dune distribution places in south China coast, the difference characteristics of grain size of modern aeolian sand and beach sand in south China coast are analyzed by use of grain size parameters such as the component of grain size, mean size, standard deviation, skewness and kurtosis. The results show that, compared with the beach sand, modern aeolian sand have the characteristics of thinner grain size, higher sorting degree, more positive skewness and sharper kurtosis. But modern aeolian sand and beach sand in south China coast have no marked difference, they have the similar probability cumulative curve and normal could not be distinguished by use of the parameter plot of grain size. Meanwhile, the difference of modern aeolian sand and beach sand clearly changes in different coastal regions. These difference characteristics of modern aeolian sand and beach sand in south China coast are mainly resulted from the short formation time of coastal aeolian dunes, wind direction change of monsoon climate, high frequency typhoon, narrow space for aeolian activities, sand sources of different grain size and different scale of coastal dune.
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Received: 10 June 2014
Published: 20 January 2015
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2015, Vol. 35 
