摘要
【目的】研究新疆塔克尔莫乎尔沙漠北缘灌丛沙堆表层沉积物粒度特征,为区域风沙治理提供科学依据。【方法】以新疆塔克尔莫乎尔沙漠北缘发育典型的灌丛沙堆为研究对象,分析灌丛沙堆整体及不同地貌部位表层沉积物粒度及粒度参数特征,探讨粒度参数之间的相关性。【结果】研究区灌丛沙堆表层沉积物主要以细砂(46.48%)、中砂(41.29%)、极细砂(6.10%)、粗砂(4.26%)为主;在不同地貌部位中,中砂百分含量从迎风坡到顶部再到背风坡,呈现先增加后减少的趋势,而粗砂变化规律与之相反,极细粉砂、细粉砂、中粉砂、极粗粉砂、极细砂在不同地貌部位中的变化规律相近;表层沉积物粒度参数中平均粒径、分选系数、偏度、峰态平均值分别为2.06Φ、0.62Φ、0.04Φ、0.97Φ,表层沉积物属于细砂范围,且属于中等偏好分选性,呈现近对称分布,属中等峰态;平均粒径与偏度、峰态,峰态与偏度呈现显著正相关,其他粒度参数之间的相关性不显著。【结论】研究区内灌丛沙堆表层沉积物迎风坡从坡底沙粒趋于细化,在背风坡从坡顶到坡底沙粒趋于细化,分选性中等偏好,分配程度均匀性良好。
【Objective】To enrich the study of aeolian geomorphology in Takermohuer Desert,Xinjiang,and to provide basis for regional aeolian sand control.【Method】The characteristics of grain size and grain size parameters of surface sediments of typical shrub sand stacks in the northern margin of Takermohuer Desert were analyzed,and the correlation between grain size parameters was discussed.【Result】The surface sediments of shrub sand pile in the study area are mainly fine sand(46.48%),medium sand(41.29%),very fine sand(6.10%)and coarse sand(4.26%).In different geomorphic positions,the percentage of medium sand increased first and then decreased from windward slope to the top and then to leeward slope,while the change regularity of coarse sand was opposite,and the change regularity of very fine silt,fine silt,medium silt,very coarse silt and very fine sand were similar in different geomorphic positions.The average grain size,sorting coefficient,skewness and peakness of surface sediments in shrub sand pile are 2.06Φ,0.62Φ,0.04Φ,0.97Φ,respectively.The surface sediments belong to fine sand and have medium preference sorting,showing nearly symmetrical distribution,belonging to medium peakness.The mean particle size was positively correlated with skewness and kurtosis,while the other particle size parameters were not significantly correlated.【Conclusion】In the study area,the sand grains on the windward slope tended to be refined from the bottom of the slope,and the sand grains on the leeward slope tended to be refined from the top of the slope to the bottom of the slope,with moderate preference for sorting and good distribution uniformity.
作者
王佩
马倩
朱元璞
曾燚
WANG Pei;MA Qian;ZHU Yuanpu;ZENG Yi(College of Geographical Science and Tourism,Xinjiang Normal University,Urumqi 830054,China;Research Center for Urbanization Development of Silk Road Economic Belt,Xinjiang Normal University,Urumqi 830054,China)
出处
《甘肃农业大学学报》
CAS
CSCD
2022年第1期139-144,153,共7页
Journal of Gansu Agricultural University
基金
新疆师范大学丝绸之路经济带城镇化发展研究中心招标课题(XJNURWJDO62018A02)。
关键词
沙堆沉积物
粒度特征
粒度参数
灌丛沙堆
塔克尔莫乎尔沙漠北缘
sand pile sediment
particle size characteristics
particle size parameters
scrub sand pile
northern margin of Takermohuer Desert
作者简介
第一作者:王佩,硕士研究生。E-mail.1421563820@qq.com;通信作者:马倩,副教授,硕士生导师,研究方向为干旱区景观生态与环境演变。E-mail.mq1979@ya-hoo.cn。
