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本文进行了探地雷达在福建漳浦六鳌半岛海岸抛物线沙丘沉积构造探测中的初步应用。结果表明:(1)被探测海岸沙丘的粒度、含水量等理化性质,不同的天线频率,室内数字滤波、增益调适等图像处理环节,均会对探地雷达的探测结果产生影响。(2)本次探测结果以及人工砂坑剖面表明探地雷达是探测海岸沙丘沉积构造的良好手段。(3)通过判读探地雷达图像显示的沉积构造序列组合特点,并根据最近数十年研究区海岸环境演变初步调查结果,认为所探测海岸抛物线沙丘的发育过程,经历了早期海滩脊出露海面、继而发育植被和抛物线沙丘两个阶段。
In this paper, a preliminary application of GPR to the sedimentary structures of the parabolic sand dunes in the Liu’ao Peninsula coast of Zhangpu, Fujian Province was conducted. The results show that: (1) The physical and chemical properties such as particle size and water content of sand dunes detected, different antenna frequencies, indoor digital filtering, gain adjustment and other image processing links all have an impact on the detection results of GPR. (2) The results of this survey and the artificial sand pit section indicate that GPR is a good means of detecting the sedimentary structure of the coastal sand dunes. (3) According to the characteristics of the sequences of sedimentary structures displayed by GPR images and based on the preliminary investigation of the evolution of coastal environment in recent decades, it is considered that the development of the seashore parabolic dunes underwent the early beach ridge exposed sea surface , Followed by the development of vegetation and parabolic dunes in two stages.