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	青藏高原抬升对雅鲁藏布江泥沙运动和地貌演变的影响
	王兆印 ; 余国安 ; 王旭昭 ; 刘乐 ; WANG Zhao-yin ; YU Guo-An ; WANG Xu-zhao ; LIU Le
	2016-03-30 ; 2016-03-30
关键词	雅鲁藏布江 泥沙沉积物 V型河谷 U型河谷 青藏高原抬升 Yalu Tsangpo River sediment deposits V-shaped and U-shaped valleys Himalaya riverbed incision TV14 P542
其他题名	Impact of techtonic motion on sediment storage and morphology of Yalu Tsangpo Valley
中文摘要	雅鲁藏布江(以下简称雅江)的河流地貌过程伴随着青藏高原的抬升而演变,其河流地貌和泥沙沉积特征十分独特。2009-2012年非汛期采用大地电磁测深仪对雅江29个典型河谷断面的沉积物剖面进行测量,并且采集自谢通门至雅鲁藏布大峡谷约1 000km河段泥沙沉积物样品进行分析。结果显示,过去百万年来因为喜马拉雅山不均匀抬升(宽谷河段相对于其下游的峡谷河段抬升慢),雅江主要宽谷河段蓄积了约5 180亿m3的卵石夹沙沉积物,使得河谷底部抬高变宽,V型河谷转变为U型河谷。而抬升速率快的河段河床侵蚀下切,形成峡谷。; The fluvial process of the Yalu Tsangpo River occurs concurrently with the uplift of the Qinghai-Tibet an Plateau. Therefore,the river exhibits unique features in morphology and sediment deposition. Field investigations were performed from 2009- 2011 and the depth of the interface between the sediment deposits and bed rock was detected with an electromagnetic imaging system at 29 cross sections. Sediment deposits were sampled along the Yalu Tsangpo Valley from Xietongmen to the Yalu Tsangpo Canyon. The results show that a huge amount of sediment has been deposited in four wide valley sections because the uplift rate in these sections was lower than that in the downstream gorge sections over the past million years. About 516 billion m3of gravel and sand have been stored in the high mountain river valleys,which has changed the V-shaped mountain river valley into a U-shaped wide river valley in the four sections. In the sections with high uplift rates the river bed is incised and has formed gorges and the Yalu Tsangpo Canyon.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/148656]
专题	清华大学
推荐引用方式 GB/T 7714	王兆印,余国安,王旭昭,等. 青藏高原抬升对雅鲁藏布江泥沙运动和地貌演变的影响[J],2016, 2016.
APA	王兆印.,余国安.,王旭昭.,刘乐.,WANG Zhao-yin.,...&LIU Le.(2016).青藏高原抬升对雅鲁藏布江泥沙运动和地貌演变的影响..
MLA	王兆印,et al."青藏高原抬升对雅鲁藏布江泥沙运动和地貌演变的影响".(2016).

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