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Bamada net - (ENTRETIEN) Énième coup d État au Mali : la « plaidoirie à charge » de Me Mamadou Ismaïla Konaté contre les militaires, les religieux et les hommes politiques maliens…
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极客日报第131期:华为将正式发布鸿蒙手机操作系统;清华成立量子信息班;美团:外卖是微利业务,直接降低抽成无法持续_极客日报-CSDN博客
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Environmental News Network - What Causes Pools below Waterfalls to Periodically Fill with Sediment?
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IMAGE: : Example of sediment filling and evacuation of sediment in a small waterfall plunge pool on Arroyo Seco, San Gabriel Mountains, California. Top: Plunge pool, free of sediment, in June. view more
Credit: Top photo credit: Kelin X. Whipple, bottom photo credit: Michael P. Lamb.
Boulder, Colo., USA: Deep pools below waterfalls are popular recreational swimming spots, but sometimes they can be partially or completely filled with sediment. New research showed how and why pools at the base of waterfalls, known as plunge pools, go through natural cycles of sediment fill and evacuation. Beyond impacting your favorite swimming hole, plunge pools also serve important ecologic and geologic functions. Deep pools are refuges for fish and other aquatic animals in summer months when water temperatures in shallow rivers can reach lethal levels. Waterfalls also can liquefy sediment within the pool, potentially triggering debris flows that can damage property and threate