
Satellite images reveal scale of flood devastation in Nepal villages
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Tracing the deadly path of the Nepal-Tibet flash flood New satellite imagery has revealed the scale of the devastation along Nepal's Trishuli River caused by Wednesday's deadly flash flood, triggered by a glacier collapse.
追踪尼藏山洪的致命路径 新的卫星图像显示了周三由冰川崩溃引发的致命山洪造成的尼泊尔Trishuli河沿岸破坏的规模。
Before-and-after images show how sections of the valley, where a torrent of floodwater and debris surged through, destroyed villages, bridges and hydroelectric power stations.
之前和之后的图像显示了山谷的部分,洪水和碎片的洪流涌过,摧毁了村庄,桥梁和水力发电站。
More than 550 people have been killed, Nepalese officials say, with hundreds more missing.
尼泊尔官员称,已有550多人遇难,另有数百人失踪。
Among the worst-hit locations reviewed by BBC Verify was a key Nepal-Tibet border crossing, which was engulfed by a rush of floodwater and captured on camera.
BBC Verify回顾的受灾最严重地点之一是尼泊尔-西藏关键边境口岸,该地被洪水淹没并被摄像机捕捉。
The satellite imagery from US-based intelligence firm Vantor, shows the site has been almost entirely washed away.
美国情报公司范托尔的卫星图像显示,该遗址几乎已被完全冲刷消失。
Shocking CCTV footage showed the moment as the deluge of water swept over buildings as people tried to escape. Damage and mud can be seen more than 2.5km (1.5 miles) upstream, reaching 100m (330 ft) above the area it first hit.
震惊的监控录像显示了洪水冲刷建筑物的瞬间,人们试图逃离。 在上游超过2.5公里(1.5英里)处可以看到损坏和泥泞,达到比最初撞击区域高出100米(330英尺)的高度。
A few miles further south is the village of Timure, which has now largely disappeared.
再往南几英里是提穆雷村,如今大部分已消失。
The walls of the valley at this point are steep, reaching up to 50m above the water line.
此处山谷的岩壁陡峭,最高可达水线以上50米。
The image shows most of the houses perched on this slope are now gone or covered in mud. A further 10km (eight miles) downstream, where the Trishuli River winds through Syapru Besi, satellite imagery now shows the village covered by mud, rock and other debris.
图片显示,这座斜坡上的大多数房屋现在都已消失或被泥泞覆盖。 再往下游10公里(8英里)处,特里舒利河蜿蜒穿过夏普鲁贝西,卫星图像显示村庄被泥土、岩石和其他杂物覆盖。
Houses and other structures have disappeared, including bridges and a hydroelectric power station. One of the larger villages to be struck by the full force of the flood was Trishuli, where some of the earliest verified footage of the disaster emerged from.
房屋和其他建筑物已消失,包括桥梁和一座水电站。 受洪水猛烈冲击的较大村庄之一是特里舒利,这里出现了最早有确凿证据的灾难录像。
A satellite image of the town and surrounding agricultural land, which is about 45km (28 miles) downstream from the border, show an entire neighbourhood has been essentially washed away.
一张卫星图像显示,位于边界下游约45公里(28英里)处的该镇及周边农田,显示整个社区基本上被冲毁。
Verified videos of the town show a bridge collapsing as the river surges forward.
经过核实的镇上视频显示,随着河水涌入,一座桥梁坍塌。
At the very same moment from ground level, footage filmed from inside a bus shows people crying out in distress and trying to flee as they see the water rushing down the river. Other dramatic videos show people sheltering inside a house, peering over the edge of a balcony as they watch a torrent of floodwater wash away almost everything around them, knocking large metal debris and a vehicle toward the building.
与此同时,从地面拍摄的视频显示,一辆公交车内有人惊叫着,试图逃离,因为他们看到水流顺着河流奔涌。 其他戏剧性视频显示人们躲在房屋内,从阳台边缘窥视,目睹洪水洪水冲刷几乎周围的一切,撞击大型金属碎片和车辆冲向建筑物。
Somehow the house remains intact and survivors can be seen in a second verified video standing surrounded by mud once the floodwater had receded.
不知怎的,房子依然完好无损,幸存者在洪水退去后,在第二个经过验证的视频中看到他们站在泥土中。
Imagery from satellite provider Planet Labs released today has also provided a clearer view of the disaster's origins at the collapsed glacier, the moment of which has been captured on a verified drone video.
卫星供应商Planet Labs今天发布的图像也更清晰地展示了灾难起因——冰川坍塌的过程,这一瞬间已被一段经过验证的无人机视频捕捉到了。
The satellite image shows an enormous chunk of the glacier has fallen away, carving an enormous path of rock and debris where water rushed through the valley.
卫星图像显示,冰川的一大块坍塌,水流穿过山谷时,岩石和碎屑在河谷中留下了巨大的痕迹。
At the base of the landslide, trees and other vegetation have been stripped at a height of more than 300m above the riverbed.
滑坡底部的树木和其他植被在河床以上300米处被剥夺。
This destructive path continues westwards along with the swelled river, before heading southwards.
这条破坏性的路径随着涨水的河流向西延伸,然后向南延伸。
Satellite images also show the formation of a barrier lake at the base of the landslide's path, which Chinese authorities have warned poses a major risk of further flooding and has hampered rescue efforts.
卫星图像还显示,滑坡路径底部形成了一个屏障湖,中国当局警告称该湖存在进一步洪水的重大风险,并阻碍了救援工作。
Dr Argha Banerjee, a glaciologist at the Indian Institute of Science Education and Research, told BBC Verify that it was not possible determine from the images how stable the barrier was or how likely the lake was to drain suddenly.
印度科学教育与研究院的冰川学家阿尔加·班纳吉博士告诉BBC Verify,仅凭图像无法判断屏障的稳定性或湖泊突然排水的可能性。
But he said there was no significant increase in its surface area between Wednesday and Thursday, despite water continuing to flow into the lake.
但他表示,尽管水仍在流入湖中,周三至周四间湖面面积并未显著增加。
Dr Banerjee said there was a visible drainage channel, which suggests some water was already escaping downstream, adding that the its volume was "not alarmingly large" and appeared to have stabilised.
班纳吉博士表示,有一条可见的排水通道,表明部分水已经在下游流失,并补充说其水量"并不大",似乎已趋于稳定。
The extent of the damage on the Tibetan side of the border remains unclear.
藏境一侧的损失程度尚不清楚。
It is a strictly controlled region which China annexed in the 1950s, where foreign media access is heavily restricted. BBC Verify has so far been unable find verifiable footage from the area. The satellite imagery - which only provides an initial glimpse into the damage of the flood - has been published by Vantor as part of its Open Data Program to help aid authorities establish where best to focus their efforts to locate the missing, rescue survivors and recover the dead.
这是一个严格管控的地区,中国于20世纪50年代吞并,外国媒体的访问受到严格限制。 BBC Verify迄今未能找到该地区可核实的录像。 这张卫星影像——仅提供了洪水损害的初步一瞥——由范托尔公司作为其开放数据项目的一部分发布,旨在帮助当局确定寻找失踪者、救援幸存者和找回死者的最佳重点。
Additional reporting Shruti Menon, Merlyn Thomas and Alex Murray.
补充报道:施鲁蒂·梅农、默林·托马斯和亚历克斯·默里。
Graphics by Mesut Ersoz and Mike Hill. What do you want BBC Verify to investigate? 'High risk' of lake breaching and causing second flood, warns China 'Our parents were crossing the border an hour before the flood hit' What we know about deadly Nepal-Tibet floods
美术由梅苏特·埃尔索兹和迈克·希尔设计。 你希望BBC Verify调查什么? 中国警告称,湖泊决口并引发第二次洪水的风险"高" "我们的父母在洪水来临前一小时正要越境" 我们对尼泊尔-西藏致命洪水的了解
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