| 巴丹吉林沙漠与腾格里沙漠连接带沙丘移动规律北大核心CSCD |
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| 引用本文： | 张云枫,马义娟,苏志珠,梁爱民,张欣,崔颖颖. 巴丹吉林沙漠与腾格里沙漠连接带沙丘移动规律北大核心CSCD[J]. 中国沙漠, 2022, 42(5): 82-91. DOI: 10.7522/j.issn.1000-694X.2022.00020 |
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| 作者姓名： | 张云枫 马义娟 苏志珠 梁爱民 张欣 崔颖颖 |
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| 作者单位： | 1.太原师范学院 地理科学学院，山西 晋中 030619;2.山西大学 历史文化学院，山西 太原 030006;3.陕西师范大学 地理科学与旅游学院，陕西 西安 710119 |
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| 基金项目： | 国家自然科学基金重点项目(41930641);中央高校基本科研业务费专项资金项目(GK202103144);国家自然科学基金面上项目(41871008) |
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| 摘 要： | 巴丹吉林沙漠与腾格里沙漠分别为中国面积第二、第三大流动性沙漠,对两大沙漠连接带新月形沙丘的动态监测可以揭示该地区沙丘形成演化规律,为沙漠连接带风沙地貌发育研究提供科学支撑。通过Google Earth高清历史影像对巴丹吉林沙漠与腾格里沙漠连接带的新月形沙丘带进行监测,分析了两大沙漠交界处沙丘的移动速率和形态变化。结果表明:巴丹吉林沙漠与腾格里沙漠连接带沙丘移动速率范围5.88-19.55 m·a^(-1),平均移动速率10.03 m·a^(-1);移动方向范围109°-135°,平均移动方向122°。风况为沙丘移动提供动力条件,合成输沙方向与沙丘移动方向吻合。受NW、WNW方向输沙影响,新月形沙丘南翼在移动速率增加的同时长度不断伸长,显著区别于北翼。沙丘移动受控于沙丘本身形态,沙丘各形态参数(迎风坡长度、高度、宽度、周长、底面积)与移动速率呈现显著负相关关系(P<0.01)。植被覆盖以及沙丘密度的差异导致了研究区沙丘移动速率的差异。沙丘移动前后,形态参数变化具有复杂性,而沙源丰富度差异以及丘间地灌丛沙包对沙丘形态的改变,是沙丘形态变化复杂性的主要原因。两大沙漠连接带年输沙通量170-521 t·m^(-1),均值为301 t·m^(-1)。
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| 关 键 词： | 沙丘移动 沙丘形态参数 新月形沙丘 巴丹吉林沙漠 腾格里沙漠 |
| 收稿时间： | 2021-12-30 |
| 修稿时间： | 2022-03-04 |
Dune movement in the joint zone of the Badain Jaran Desert and Tengger Desert |
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| Yunfeng Zhang,Yijuan Ma,Zhizhu Su,Aimin Liang,Xin Zhang,Yingying Cui. Dune movement in the joint zone of the Badain Jaran Desert and Tengger Desert[J]. ournal of Desert Research, 2022, 42(5): 82-91. DOI: 10.7522/j.issn.1000-694X.2022.00020 |
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| Authors: | Yunfeng Zhang Yijuan Ma Zhizhu Su Aimin Liang Xin Zhang Yingying Cui |
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| Affiliation: | 1.School of Geographical Science，Taiyuan Normal University，Jinzhong 030619，Shanxi，China;2.School of History and Culture，Shanxi University，Taiyuan 030006，China;3.School of Geography and Tourism，Shaanxi Normal University，Xi'an 710119，China |
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| Abstract: | Badain Jaran desert and Tengger Desert are the second and third largest mobile deserts in China. The dynamic monitoring of barchan dunes in the joint zone of the two deserts can reveal the formation and evolution law of dunes in this area， and provide scientific support for the study of aeolian geomorphology development in the joint zone of deserts. The barchan dunes in the joint zome of Badain Jaran Desert and Tengger Desert were monitored by Google Earth high-resolution historical images， and the dune migration rate and morphological changes in this area were analyzed. The results showed that the average migration rate of dunes is 5.88-19.55 m?a-1 in the study area， with an average of 10.03 m?a-1. The moving direction of sand dunes ranges from 109°to 135°， and the average moving direction is 122°. During the dune movement， the dune morphological changes are more complex. Before and after the movement， except for the reduced height of the sand dunes， the length， width， perimeter and basal area and the windward slope of the barchan dunes generally tends to increase. Wind regime provides dynamic conditions for dune movement. The moving direction of sand dunes is consistent with resultant drift direction. The wind direction in the study area is mainly NW and WNW， and the migration rate of south arm of barchan dune is significantly higher than that of north arm due to the influence of WNW direction sand transport. In addition， the dynamic change of dune is also controlled by the morphology of dune itself. There is a significant negative correlation between dune migration rate and dune morphology parameters （windward slope length， height， width， perimeter and basal area） in the study area （P<0.01）. The difference of vegetation cover and dune density leads to the difference of dune migration rate. Before and after dune movement， the variation of morphological parameters is complicated. The variation of sand source richness and the change of dune shape caused by interdune shrub are the main reasons for the complexity of dune shape change. The annual sand transport flux of the sand dune junction belt is 170-521 t?m-1， the average of the annual sand transport flux is 301 t?m-1. |
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| Keywords: | dune migration dune morphological parameter barchan dune Badain Jaran Desert Tengger Desert |
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