柴达木盆地东南部雅丹地貌形态参数研究

Morphological Parameters of Yardangs in Southeastern Qaidam Basin

雅丹地貌的外部形态特征是其对所处环境适应的表现,对雅丹地貌形态参数进行研究可以推测雅丹体所受内外营力的性质。以柴达木盆地的东南部为研究区域,通过对该区雅丹地貌形态参数的相关性分析,得出该区雅丹地貌长与宽的相关系数r=0.882 4,为强相关关系,采用最小二乘法拟合得出长/宽(R)=3.04。并通过与其它区域雅丹地貌的研究结果对比,发现全世界范围内雅丹地貌的形态参数长与宽均具有较强的相关性,而长/宽(R)值则具有区域差异性。从雅丹地貌成因的层面对这一现象进行分析,认为雅丹地貌形成因素的相似性,决定着雅丹体外部形态的相似性,即体现为长与宽的强相关性。同时又由于形成因素的区域差异性使得长/宽(R)值在不同的雅丹地貌分布区具有不同的数值。

The external morphology of Yardangs reflects the settings they exist.Therefore,through the study of Yardangs＇ morphological parameters,the interior and exterior forces that affect the Yardangs can be speculated.This paper mainly studied the morphological parameters of the Yardangs that distributes in the southeastern Qaidam Basin with data from the high resolution remote sensing images of the study area,and found that the correlation index between length and width was 0.882 4,a strongly positive correlation;the ratio of length/width calculated by least square fitting was 3.04.What＇s more,the worldwide Yardangs＇ morphological parameters shared the same strong positive correlation,while the ratio of length/width showed a regional difference.This phenomenon was tried to be explained on the basis of the forming factors of the Yardangs.It is believed that the similarity of the forming factors determined the similarity of the external morphology of the yardang body,which was reflected by the strong positive correlation between the length and width.At the same time,because of the regional differences of the Yardangs＇ forming factors,the ratio of length/width had different values in different places.