Red tide likelihood
for this week
Low
< 30 %
Forecast up-to-date:
19 Apr 2012
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Key:
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Red Tide
> 90 %
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High
> 70 %
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Medium
30 - 70 %
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Low
< 30 %
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Quick links
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Hong Kong Red Tide Information Network by the AFCD
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Tidal Prediction by the HKO
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Hong Kong Fish Net
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Yim Tin Tsai (East) Fish Culture Zone
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Location:
Tolo Harbour
**
Flushing Time:
Dry Season - 26.9 day
Wet Season - 18.5 day
 Carrying Capacity:
74.2 tonne
***Farming Scale:
Large
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Hydrodynamic information
Predicted tide levels at:
 Ko Lau Wan
Not available
Today's Current: 0 ~ 5 cm/s, Weak
Water Depth:
4 m
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** dry season – November to February; wet season – May to August
***Farming Scale (m2):
Small - 0~10000; Medium - 10001~20000; Large - 20001~30000; Very large - >30000
Fish Culture Zone Description
Yim Tin Tsai East (YTTE) Fish Culture Zone is located at Tolo Harbour, and surrounded by Yim Tin Tsai and the Ma Shi Chau Special Area. It has a weak tidal flushing and a long residence time for pollutants. The pollution problem was amplified by the rapid urbanization and industrialization of Sha Tin and Tai Po Districts in the 70s and 80s. A three-month long harmful algal bloom occurred in 1988 and caused a massive fish kill. After the commencement of Tolo Harbour Effluent Export Scheme (THEES) in 1995 and the Tai Po Master Sewage Treatment Works in 2002, the water quality in Tolo Harbour has been improved, and a decline in the number of red tides has been achieved.
The Ma Shi Chau Special Area is a geologically and ecologically important place in Hong Kong. It has many high-value geological artifacts, includes fossils of ancient ammonites, bivalves, brachiopods, corals, moss animals, sea-lilies and plants.
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