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. PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 12-14 September 2010
1. Project background Project background 1. North Bran South Br First stage Natural Depth around Mouth Bar Area: 5.5~6.0m bifurcation Sector River Bed Elevation Variation along North Passage before Regulation uth Pa age River Regime of Yangtze Estuary River Regime of Yangtze Estuary PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 1 12-14 September 2010
2. Objectives Project Objectives: 12.5m deep 、 350~400m wide 、 92.2km long Navigation Channel Theoretical lowest tidal level 一期 8.5m Soil surface 1998.1-2002.9 二期 10m 三期 12.5m 2002.4-2005.11 Riverbed PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 2 12-14 September 2010
3. General Scheme 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.
4. Current channel depth 10.5m 12.5m PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 4 12-14 September 2010
5. Economic benefits excluded the 19.5 8.5 million of million TEU the quantity of container the quantity of container Yang Shan ships of Shanghai Harbor --- ships Harbor second top in the world 5.61 2000 年 2008 年 million tons 5.8 2.04 the cargo quantity of the cargo quantity Shanghai Harbor –top of 2000 年 2008 年 the world PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 5 12-14 September 2010
6. L and creating plan of Shanghai Northern Chongming Eastern Hengsha Shoal Eastern Nanhui Shoal PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 6 12-14 September 2010
L and Creation in Eastern Hengsha Shoal Land creating area Re-handle 1# # pit 2# 2# 3# 3# 4# 4# Discharge area Beneficial Use of Dredging Material PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 7 12-14 September 2010
Soil Reclamation in Eastern Hengsha Shoal Re-handled pumping via TSHD pumping ashore Cutter dredger
Beneficial Use of Dredging Material 累计吹泥上滩量约1.5亿方 Reclamation 150 Million m 3 17km2 PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 9 12-14 September 2010
Beneficial Use of Dredging Material Creating land 17km 2 2010 年 Manual siltation 80 km 2 1# # 2# 2# 3# 3# 4# 4# By 2015, creating land 80km 2 PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 10 12-14 September 2010
7. Solution for long-distance transport of soil >90km >50km PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 11 12-14 September 2010
7. Solution for long-distance transport of soil PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 12 12-14 September 2010
Re-handled pit 4# 4# 8. Technology Optimization 3# 3# 2# 2# # 1#
(A) Neutron trace PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 14 12-14 September 2010
（ B ） Observation Dredge Soil Diffusion by ADCP 0 2.5 西 东 Sep.18 08:01:55 1 2 2 Depth /m 1.5 3 1 4 0.5 5 0 0 50 100 150 200 250 300 350 400 g/l Distance /m PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 15 12-14 September 2010
（ C ） Numerical model 涨潮 落潮 PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 16 12-14 September 2010
（ D ） Application Re-handled pit’s Position adjustment TSHD discharge time control table for use of the re-handled pits PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 17 12-14 September 2010
9. Environmental Protection Monitor area : 1674km 2 水质和沉积物监测 Water and Sed.Quality 水生生态环境监测 Water Ecology Monitor items 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 The monitoring results show that the project has not made the negative influence to ecological environment in Yangtze Estuary.
Ecological Restoration Five Ecological Restoration Project Location of 5 time Eco ation Engineers
An intertidal oyster reef ( ∼ 260 ha) was created
Four new type fishes first found in Yangtze Estuary 鳞鳍叫姑鱼 美肩鳃鳚 短棘缟虾虎鱼 竿虾虎鱼 PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 21 12-14 September 2010
10. Yangtze Estuary Channel Planning 10m 8m PIANC 125 th Anniversary Celebration in ASIA, Nagoya JAPAN 22 12-14 September 2010
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