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首页> 美国卫生研究院文献>Scientific Reports >Windblown sediment transport and loss in a desert–oasis ecotone in the Tarim Basin
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Windblown sediment transport and loss in a desert–oasis ecotone in the Tarim Basin

机译：塔里木盆地荒漠-绿洲过渡带的风吹输沙和流失

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The Tarim Basin is regarded as one of the most highly erodible areas in China. Desert comprises 64% of the land use in the Basin, but the desert–oasis ecotone plays a prominent role in maintaining oasis ecological security and stability. Yet, little is known concerning the magnitude of windblown sediment transport in a desert-oasis ecotone. Therefore, aeolian sediment transport and loss was assessed from a desert-oasis experimental site located near Alaer City in the northwestern Tarim Basin. Sediment transport and factors governing transport were measured during three high wind events in 2012 and four events in 2013. Sediment transport was measured to a height of 10 m using passive aeolian airborne sediment samplers. The mass flux profile over the eroding surface was well represented by the power-law (R2 > 0.77). Sediment loss from the site ranged from 118 g m−2 for the 20–24Apr 2012 wind event to 2925 g m−2 for the 31Mar–11Apr 2012 event. Suspension accounted for 67.4 to 84.8% of sediment loss across all high wind events. Our results indicate the severity of wind erosion in a desert-oasis ecotone and thus encourage adoption of management practices that will enhance oasis ecological security.
机译：塔里木盆地被认为是中国最易侵蚀的地区之一。沙漠占流域土地使用的64％，但荒漠-绿洲过渡带在维护绿洲生态安全和稳定方面发挥着重要作用。然而，关于荒漠绿洲过渡带的风吹沉积物输送量知之甚少。因此，从塔里木盆地西北部阿拉尔市附近的沙漠绿洲实验点评估了风沙沉积物的运输和流失。在2012年的3次大风事件和2013年的4次事件中测量了泥沙运移和控制运移的因素。使用被动风沙机载沉积物采样器将泥沙运移的高度测量为10μm。幂律（R 2 −2 到2012年3月31日至11月11日事件的2925 2g m −2 。在所有强风事件中，悬浮物占沉积物损失的67.4％至84.8％。我们的结果表明，荒漠绿洲过渡带风蚀的严重性，因此鼓励采用能够增强绿洲生态安全性的管理措施。

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