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| Extraction of Sand Ripple Crest Lines and Application Calculation |
| Li Meng, Dong Zhibao, Zhang Zhengcai |
| Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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Abstract As the most basic geomorphic unit on sandy surface by wind, aeolian sand ripple is the theoretical foundation for studying the initial process and the movement process of aeolian sand transportation. Because of its small scales and fast formation, aeolian sand ripples is difficult to measure. In recent years, with rapid development of computer graphics technology, digital image processing technology is widely used and facilitates the measurement and calculation of aeolian sand ripples. Based on images taken by HD video camera, digital image processing technology is used to extract sand ripple crest lines and calculate sand ripple morphometric parameters utilizing Matlab software. In this study, through verification and analysis of sand ripple on the southeastern margin of the Tengger Desert, normal distribution rule of the sand ripple wavelength was obtained. Sand ripple wavelength grows and evolves over time and the range develops from 1 cm to 10 cm within 40 minutes. Finally, this method is applied to calculate sand ripple crest line length and sand ripple wavelength. This digital image processing method makes data statistics for sand ripples easier, and improves the efficiency of data collection, providing a new method for sand ripple crest lines extraction.
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Received: 17 November 2013
Published: 20 March 2014
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[1] Bagnold R A.The Physics of Blown Sand and Desert Dunes[M].London,UK:Methuen,1941.
[2] Anderson R S.A theoretical model for impact ripples[J].Sedimentologye,1987,34:943-956.
[3] 朱震达.应用实验方法来研究风沙地貌形成过程的若干特征[M]//中国科学院治沙队.治沙研究(第四号).北京:科学出版社,1962:48-61.
[4] Andreotti B,Claudin P,Pouliquen O.Aeolian sand ripple:Experimental study of fully developed states[J].Physical Review Letters,2006,96:028001.
[5] 张强,王正林.精通MATLAB图像处理[M].北京:电子工业大学出版社,2009:49-50.
[6] Rafael C G,Richard E W,Steven L E,等.数字图像处理(MATLAB版)[M].阮秋琦,译.北京:电子工业大学出版社,2009:38-40.
[7] 蒋缠文,董治宝,文青.基于MATLAB平台的遥感影像沙丘脊线提取与地貌格局表征参数计算[J].中国沙漠,2013,33(6):1636-1642.
[8] 武生智,王鹏.风成沙波纹的数值模拟及稳定性分析[J].中国沙漠,2013,33(4):967-972.
[9] 李猛,董治宝,张正偲.风成沙波纹数学模型综述[J].中国沙漠,2013,33(5):1285-1292.
[10] 董治宝,郑晓静.中国风沙物理研究五十年(Ⅱ)[J].中国沙漠,2005,25(6):795-815.
[11] 周旭,吴成来,林朝晖,等.沙尘模式地表起沙参数不确定性分析[J].中国沙漠,2011,31(3):575-582. |
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2014, Vol. 34 
