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An Evaluation of the Dust Emission Characteristics of Typical Underlying Surfaces in an Aeolian Region in the Middle Reaches of the Yarlung Zangbo River on the Qinghai–Tibet Plateau

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  • Mingjie Ma

    (Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China
    National Observation and Research Station of Desert Meteorology, Taklimakan Desert of Xinjiang, Urumqi 830002, China
    Taklimakan Desert Meteorology Field Experiment Station of China Meteorological Administration, Urumqi 830002, China
    Xinjiang Key Laboratory of Desert Meteorology and Sandstorm, Urumqi 830002, China)

  • Duo Zha

    (Shannan Meteorological Bureau, Shannan 856000, China)

  • Qing He

    (Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China
    National Observation and Research Station of Desert Meteorology, Taklimakan Desert of Xinjiang, Urumqi 830002, China
    Taklimakan Desert Meteorology Field Experiment Station of China Meteorological Administration, Urumqi 830002, China
    Xinjiang Key Laboratory of Desert Meteorology and Sandstorm, Urumqi 830002, China)

  • Xinghua Yang

    (School of Geographical Sciences, Shanxi Normal University, Taiyuan 030032, China)

  • Fan Yang

    (Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China
    National Observation and Research Station of Desert Meteorology, Taklimakan Desert of Xinjiang, Urumqi 830002, China
    Taklimakan Desert Meteorology Field Experiment Station of China Meteorological Administration, Urumqi 830002, China
    Xinjiang Key Laboratory of Desert Meteorology and Sandstorm, Urumqi 830002, China)

  • Ali Mamtimin

    (Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China
    National Observation and Research Station of Desert Meteorology, Taklimakan Desert of Xinjiang, Urumqi 830002, China
    Taklimakan Desert Meteorology Field Experiment Station of China Meteorological Administration, Urumqi 830002, China
    Xinjiang Key Laboratory of Desert Meteorology and Sandstorm, Urumqi 830002, China)

  • Xiannian Zheng

    (Xinjiang Climate Center, Urumqi 830002, China)

  • Han Sun

    (Innovation Institute of Disaster Prevention and Reduction ant Inner Mongolia, Huhhot 010051, China)

Abstract

Some of the most severe aeolian damage occurs along the middle reaches of the Yarlung Zangbo River in Tibet. Dust emission amounts (DEAs) are often used to assess aeolian damage; however, the research on DEAs in this area is currently almost blank. This article uses field-measured wind speed data from 2021 to 2022 in the Shannan wide valley area, combined with the Gillette dust emission estimation model to quantitatively determine the contributions of three surface types (riverbank quicksand area, foothill sand dunes, and the river floodplain vegetation area) to DEAs in the research area. The influence of surface characteristics on DEAs is analyzed and discussed. The results show the following: (1) The threshold friction velocity ( u * t ) in the riverbank quicksand area, foothill sand dunes, and the river floodplain vegetation area is 30.6 cm/s, 71.2 cm/s, and 85.6 cm/s, respectively, the threshold velocity ( u t ) is 6.1 m/s, 7.0 m/s, and 7.5 m/s, respectively, and the vegetation area is 2.8 times and 1.3 times that of the quicksand area, respectively. (2) The DEAs were in the following order: the riverbank quicksand area (652.9 t/km 2 ) > foothill sand dunes (326.5 t/km 2 ) > the river floodplain vegetation area (107.8 t/km 2 ), the riverbank quicksand area is about 6.1 times that of the river floodplain vegetation area, and DEAs are a significant seasonal distribution: winter (44.7%) > spring (28.3%) > autumn (15.7%) > summer (11.3%). (3) The DEAs from the dusty weather were in the following order: blowing sand (60.2%) > sandstorms (28.6%) > gusty winds (11.2%). (4) The DEAs increase with the increase in the average wind speed greater than 6.1 m/s, but the increase rate is obviously different, which showed that Changguo and Azha are greater than Sangyesi, Duopazhang, Sangri, and Senburi. At approximately the same average wind speed greater than 6.1 m/s, the DEAs in the quicksand area are much greater than in the vegetation area.

Suggested Citation

  • Mingjie Ma & Duo Zha & Qing He & Xinghua Yang & Fan Yang & Ali Mamtimin & Xiannian Zheng & Han Sun, 2024. "An Evaluation of the Dust Emission Characteristics of Typical Underlying Surfaces in an Aeolian Region in the Middle Reaches of the Yarlung Zangbo River on the Qinghai–Tibet Plateau," Land, MDPI, vol. 13(8), pages 1-16, July.
    • Handle: RePEc:gam:jlands:v:13:y:2024:i:8:p:1168-:d:1445728
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    References listed on IDEAS

    as
    1. Mingjie Ma & Xinghua Yang & Chenglong Zhou & Qing He & Ali Mamtimin, 2020. "Contributions of dusty weather and dust devil to dust emission amounts at the northern margin of the Taklimakan Desert," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 103(1), pages 1441-1454, August.
    2. Xinghua Yang & Qing He & Xinchun Liu & Fan Yang & Wen Huo & Shuanghe Shen & Ali Mamtimin, 2018. "Saltation activity and its threshold velocity in the Gurbantunggut Desert, China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 90(1), pages 349-364, January.
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