PIANC Smart Rivers 2022
Reviewing Presentation documents
Topic:
Inland Navigation Structure
Logistics
River System Management
Smart Shipping
Special Sessions
Waterway Infrastructure
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Albania
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Angola
Antigua and Barbuda
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Australia
Austria
Azerbaijan
Bahamas
Bahrain
Bangladesh
Belarus
Belgium
Belize
Benin
Bermuda
Bhutan
Bolivia
Bosnia and Barbados
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Botswana
Brazil
British Virgin Islands
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Bulgaria
Burkina Faso
Burundi
Cambodia
Cameroon
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Cayman Islands
Central African Republic
Chad
Chile
China
China(Hong Kong)
China(Macao)
China(Tai wan)
Colombia
Comoros
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Croatia
Cuba
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Egypt
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Equatorial Guinea
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Albania
Algeria
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Andorra
Angola
Antigua and Barbuda
Argentina
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Australia
Austria
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Bahamas
Bahrain
Bangladesh
Belarus
Belgium
Belize
Benin
Bermuda
Bhutan
Bolivia
Bosnia and Barbados
Bosnia and Herzegovina
Botswana
Brazil
British Virgin Islands
Brunei
Bulgaria
Burkina Faso
Burundi
Cambodia
Cameroon
Canada
Cape Verde
Cayman Islands
Central African Republic
Chad
Chile
China
China(Hong Kong)
China(Macao)
China(Tai wan)
Colombia
Comoros
Costa Rica
Croatia
Cuba
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Democratic Republic of the Congo
Denmark
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Dominica
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Equatorial Guinea
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Estonia
Ethiopia
Falkland Islands
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Switzerland
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Abstract :
*(250~1000 words)
With the operation of the Three Gorges Project (TGP) and the reservoirs in the upper reaches of the Yangtze River, the sediment transport significantly reduced in the lower reaches of the Yangtze River since 2003, which led to great changes in the relationship between flow and sediment. In order to study the variation characteristics of the river channel under the new conditions, the variation characteristics of flow and sediment at the main hydrological stations, the amount and intensity of erosion/deposition in the Hukou-Jiangyin reach, and the distribution of erosion/deposition in the channel were analyzed. The results showed that the Hukou-Jiangyin reach experienced both erosion and deposition from 1998 to 2006, while unidirectional erosion in both benchland and channel after 2006. From 2006 to 2020, the average annual erosion intensities per kilometer below bankfull channel in Hukou-Datong river section and Datong-Jiangyin river section were 12.56×104 m3/km and 17.17×104 m3/km, respectively, increasing by 79.94% and 67.35%, respectively, compared with those during the period from 1998 to 2001, i.e., the times before the impoundment of TGR. The riverbed erosion intensity of Datong-Jiangyin reach was 1.37 times that of the upper Hukou-Datong reach. The erosion mainly occurred below bankfull channel, while the erosion between low water channel and high water channel only accounted for 10%~20%. Specifically, the ratios of the erosion amounts under low water channel and bankfull channel to those under flood channel accounted for 86.67% and 91.14%in Hukou-Datong river section, respectively. And those ratios in Datong-Jiangyin river section were 80.34% and 86.69%, respectively.
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