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Dredging Construction and Environmental Protection on the Improvement Project of Deep- Draft Channel of Yangtze Estuary Jianfei Zhu Director of Scientific Research Management Dept. Yangtze Estuary Waterway Administration Bureau Ministry of


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PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

Dredging Construction and Environmental Protection on the Improvement Project of Deep- Draft Channel of Yangtze Estuary

Jianfei Zhu

Director of Scientific Research Management Dept. Yangtze Estuary Waterway Administration Bureau Ministry of Transport. People’s Republic of China.

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PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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1.

  • 1. Project background

Project background

River Regime of Yangtze Estuary River Regime of Yangtze Estuary

First stage bifurcation

North Bran

South Br

Sector

age uth Pa

Natural Depth around Mouth Bar Area: 5.5~6.0m

River Bed Elevation Variation along North Passage before Regulation

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  • 2. Objectives

Soil surface 一期8.5m

1998.1-2002.9

Riverbed

二期10m

2002.4-2005.11

Theoretical lowest tidal level 三期12.5m Project Objectives: 12.5m deep、350~400m wide、92.2km long Navigation Channel

PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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The building length of training dike and groins : 170 km. The total dredge volume : 330 million cubic meters, including 230 million cubic meters for dredging from10 m to 12.5 m.

  • 3. General Scheme
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PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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  • 4. Current channel depth

12.5m 10.5m

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  • 5. Economic benefits

2000年 2008年 the quantity of container the quantity of container ships ships of Shanghai Harbor --- second top in the world 19.5 2000年 2008年 the cargo quantity the cargo quantity of Shanghai Harbor –top of the world 2.04 5.8

million TEU million tons

5.61

excluded the 8.5 million of Yang Shan Harbor PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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  • 6. Land creating plan of Shanghai

PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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Eastern Hengsha Shoal Eastern Nanhui Shoal Northern Chongming

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Re-handle pit

# 1# 2# 2# 3# 3# 4# 4#

Discharge area

Land creating area

Land Creation in Eastern Hengsha Shoal

PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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Beneficial Use of Dredging Material

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TSHD pumping ashore Re-handled pumping via Cutter dredger

Soil Reclamation in Eastern Hengsha Shoal

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Beneficial Use of Dredging Material

PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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累计吹泥上滩量约1.5亿方 Reclamation 150 Million m3 17km2

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# 1# 2# 2# 3# 3# 4# 4#

Beneficial Use of Dredging Material

PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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Creating land 17km2 Manual siltation 80 km2 2010年 By 2015, creating land 80km2

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PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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  • 7. Solution for long-distance transport of soil

>50km >90km

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PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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  • 7. Solution for long-distance transport of soil
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Re-handled pit # 1# 2# 2# 3# 3# 4# 4#

  • 8. Technology Optimization
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(A) Neutron trace

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(B) Observation Dredge Soil Diffusion by ADCP

Distance /m Depth /m Sep.18 08:01:55

西 东

50 100 150 200 250 300 350 400 1 2 3 4 5 g/l 0.5 1 1.5 2 2.5

PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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落潮 涨潮

(C) Numerical model

PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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(D) Application

PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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Re-handled pit’s Position adjustment TSHD discharge time control table for use of the re-handled pits

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Monitor area :1674km2

水质和沉积物监测 Water and Sed.Quality 水生生态环境监测 Water Ecology 渔业资源监测 Fishery Resource 导堤附着动物的检测 Benthos on Dikes monitor 倾倒区泥沙扩散检测 Dredging soil Movement monitor

Monitor items

  • 9. Environmental Protection

The monitoring results show that the project has not made the negative influence to ecological environment in Yangtze Estuary.

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Five Ecological Restoration Project

Ecological Restoration

Location of 5 time Eco ation Engineers

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An intertidal oyster reef (∼260 ha) was created

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鳞鳍叫姑鱼 短棘缟虾虎鱼 竿虾虎鱼 美肩鳃鳚 Four new type fishes first found in Yangtze Estuary

PIANC 125th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010

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  • 10. Yangtze Estuary Channel Planning

10m 8m

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