aerial photography
bottom
channel
china
climate
dam crest
drought
embankment
high viewing angle
hubei
hubei province
hydrology
jiang xin
jiangxin road
overhead shot
parrot island yangtze river bridge
reduce
remediation
reveal
river
river bottom
route
sail
shipping
shoal
stone
submerged
water level
water level drops
water shortage
weather
wuhan
yangtze
yangtze river channel
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