摘要
罗布泊雅丹形态多为定性研究,遥感技术为该区雅丹形态定量研究创造了条件。文中利用Google Earth高分辨率遥感影像,测量罗布泊4个区域共1200个雅丹单体的长度、宽度和走向,并计算长宽比值(R值)。结果显示:罗布泊雅丹以流线型为主,长度均值96.67m,82.5%集中在0~150m;宽度均值22.33m,79.5%集中在5~35 m;走向平均北24°东,70%分布于北5°东~北25°东。长与宽之间呈强相关性(R^(2)=0.717)。各分区雅丹形态存在差异,龙城、陷车泉和白龙堆雅丹大小和走向基本一致,楼兰雅丹个体最小且走向更偏NE~SW。R值91.25%集中在3~6,均值4.23,接近风洞试验结果4.0,表明罗布泊各个时期发育的雅丹遵循R值4:1的规律,反映风动力是罗布泊雅丹发育的主要动力,塑造了区域雅丹的基本形态。该研究对区域雅丹的形态特征、发育机制和旅游资源开发具有重要意义。
Previous studyies on morphological characteristics of Lop Nur Yardang were mainly qualitative.However,the remote sense provides a technology for quantitative analysis of the Yardang.In this study,Google Earth was applied for measuring of length,width,direction,and length-width ratio of 1200 Yardangs from 4 areas in Lop Nur region,Xinjiang.The results showed that,Yardangs in Lop Nur are dominated by streamline landform;the average value of length is 96.67 m,and 82.5%of the length of Yardangs are between 0 m and 150 m;the average value of width is 22.33 m,and 79.5%of the width of Yardangs are in the range of 5~35 m;the average value of length-width ratio is north 24°east,and 70%of it are in the range of north 5°east to north 25°east.The length and width present strong positive correlation with the R^(2)0.717.Yardangs from Longcheng,Xianchequan and Bailongdui are very similar in size and direction,but lower and more NE~SW in Loulan.91.25%of the R values are between 3 and 6 with the average value of 4.23.The value is near the results of wind tunnel experiment tremendously,indicating the Yardangs follow the rule of 4:1 even though formed in different periods,and reflecting wind is the dominating dynamic in the development process of Lop Nur Yardang.This study is very important for understanding the morphology and formation mechanism of Lop Nur Yardang and its tourism development.
作者
潘大东
林永崇
PAN Dadong;LIN Yongchong(School of History and Geography,Minnan Normal University,Zhangzhou 363000,China)
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2022年第6期157-163,共7页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金青年基金项目(41601012)
福建省教育厅中青年教师教育科研项目(JAT190366)
福建省高校杰出青年科研人才培育计划资助。
关键词
雅丹
风蚀地貌
形态特征
风动力
罗布泊
Yardang
wind erosion landform
morphological characteristic
wind dynamic
Lop Nur
