global ship capacity: are there enough ships to protect our ports from sea level rise? leigh hammel...
TRANSCRIPT
Global Ship Capacity:Are there enough ships to protect our ports
from sea level rise?
Leigh HammelMarch 10, 2010
CEE 129
Ship Requirements
- Looking at approximately 150 ports worldwide- At least 2 specialty ships per port- Plus accessory barges and tugboats, approximate
at 3
(150 2) (3 150) 750 ships world wide
Within the US
Approximately 75 ports
We need:- 150 specialty ships- 225 accessory ships
What do we have?
• As a nation (approx): – 6200 tugboats and towboats– 3200 barges
Accessory ships ✔
http://www.canalmuseum.com/canalphotos/tugboat-08.jpg
Specialty Ships
USACE – 3Manson (SF Bay) – 4General Construction - 5Cosco (China) – 4-8
• 3 companies X fleet of 4 = 12 ships per region• Regions:– Pacific Northwest– SF Bay/Northern CA– Southern CA – Florida/Gulf of Mexico– Northeast
• Approximately 60 ships within the US 90 ship deficit
Ships around the world
• China is the next largest producer of specialty ships in the world
• If the US does not have enough ships for ourselves, and China is producing less ships, there will be a deficit there too
• Other countries with high ship production:– Netherlands– UK– Bangladesh
• These countries have less demand for specialty ships, so nationally may have a sufficient amount, but globally still a deficit
limitations
1. The majority of these ships can only lift up to 150-200 tons, this is only 1/5 of the capacity of the Oosterschelde dam’s ships
2. Requiring only 2 ships per site is a generous assumption – the Oosterchelde dam had 5
3. Replacing ships – it takes approximately two years to build new ships, and each facility can usually build 2-5 at a time