Environmental Engineering Reference
In-Depth Information
6.4 Probabilistic Model Application
The Liaodong Bay is a semi-enclosed embayment located between the Liaodong
Peninsula and Hebei Province. The bottom of bayhead is varied and is quite shallow,
especially at the Liaohe Estuary where the water depth is generally less than 10m.
The basin geometry and shallowwater cause the lowwater exchange ability and poor
marine environmental capacity. A certain amount of marine reserves and leopard seal
habitat are located inLiaodongBay, meanwhile there are several oil terminal harbours
distributed along the coastline (Fig.
6.2
). Ocean transportation has been growing in
recent years, and with it, the inherent risk towards the marine environment. Take
a part for example, more than 3,000 tons crude oil has been inbound every year
at the Port of Xianren Island. What is more, Panjin crude oil terminal, capable of
receiving 300,000 deadweight tonnes (DWT) carriers, is being planned to construct.
Assessment of oil spill risk for the ecology of the gulf needs to be addressed through
scientific techniques to help manage the sensitive waters from accidental oil spills.
The SWAN with a time step of 60min and SELFE with a time step of 5min are
both run over the 10-year period, from August 1, 1999 to July 31, 2008, based on
the same computational grid containing 53,058 triangles and 32,296 nodes with the
finest resolution near Panjin Port (Fig.
6.3
). The spill location is set at the multi-
channel intersection waters (121
ⓦ
57
56
N), where oil pollution damage
caused by collision between ships is most likely to occur. Due to no occurrence of oil
55
E, 40
ⓦ
37
.
.
Fig. 6.2
Location map of Liaodong Bay
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