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 Fish Culture Zone
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Location:
Tolo Harbour
**
Flushing Time:
Dry Season - 28.5 day
Wet Season - 18.3 day
 Carrying Capacity:
92.9 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:
8 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 (YTT) Fish Culture Zone is located at the most inner part Tolo Harbour, the semi-closed estuary connecting Shing Mun and Tai Po Rivers to Mirs Bay. The area has weak tidal flushing and a long residence time for pollutants. The problem was amplified by the rapid urbanization and industrialization of Sha Tin and Tai Po 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.
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