South China Sea Project Document for Chinas Hepu Seagrass Habitat Demonstration Site
The seagrass bed, including the adjacent area, is complicated, consisting of a deep slot
and sand ridge arrangement. There is a strong current along this part of the coast, which
causes erosion due to the tides and wave action. The topography of the seabed includes tidal
shoal, tidal and deep slot, tidal sand ridge, and seabed plain.The weather is influenced by the south subtropical ocean quarter breeze Influence of the
atmospheric-circulation and the geographic location results in some favourable weather
characteristics, for example, winter has no frost, summer is not hot, spring and autumn are
short, and the quarter breeze is extensive. Average air temperature is 22.9 , with a high of
38.2 , and a low of 1.5 . Wind direction varies with the season throughout the year with
prevailing winds in the winter from the northeast and from the southwest in summer, with an
average wind velocity of 3.7m/ s. The average annual rainfall was 1573.4 mm in recent years,
with 83% occurring in the summer half of the year. The rain falls on average for 144 days per
year. Influence of typhoons is important, with two or three occurring every year, usually
between July and September, (CCCBR, 1993).
Demo_Site_Seagrass_China_Hepu.pdf
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