2. Field Trip to Hoi Hai Wan Marine Park
•We went to Hoi Ha Wan
Marine Park on 15th
January,2008
•It was mostly sunny with
scattered clouds.
•It was quite cold, we used
an electronic thermometer
to measure the air
temperature, it was 13.8℃.
2
3. Hong Kong’s Natural Environment – An
3
Overview
Hong Kong is located on the Northern margins of the tropics and has a
subtropical climate. The monsoon winds cause a marked season
alternation of weather: winters are cool and dry and summers are hot
and wet.
4. Hong Kong’s Natural Environment – An
4
Overview
Hong Kong has a total land area of 1,100Km2 surrounded by 1800Km2
of territorial waters.
5. Hoi Hai Wan’s Natural Environment – An
5
Overview
Hoi Hai Wan Marine Park covers an area of around 2.6 Km2. The Park is a
sheltered bay. It is a park consisting of an area of sea and the marine life
there is protected by law, so we cannot destroy the creatures there.
6. 6
Weather Condition on Jan 15.
We did some simple experiments as the Oceanographers do. We used a
flag and a compass for measuring the wind direction.
The wind
direction was:
“NNE”
7. 7
Weather Condition on Jan 15.
Then we used anemometer to measure the wind speed.
The wind speed
was:
6.4Km/h
8. 8
Weather Condition on Jan 15.
We took some water from the sea, and then, we measured the surface
water temperature, salinity of sea water, dissolve oxygen level.
Surface
water temp.
was 17.5℃
Salinity of
sea water
was 34ppt
Dissolved
oxygen was
7.82mg/L
9. 9
Weather Condition on Jan 15.
We took some water from the sea, and then, we measured the surface
water temperature, salinity of sea water, dissolve oxygen level.
Surface
water temp.
was 17.5℃
Salinity of
sea water
was 34ppt
Dissolved
oxygen was
7.82mg/L
10. 10
Weather Condition on Jan 15.
Then we measured the visibility of seawater by a Secchi Disc.
The visibility of seawater was 3M
12. 12
Organism Observation
Here are 2 photos of planktons we too. But you can find more photos in
KF – special feature , Hoi Hai Wan, HK View.
After the trip, we learnt that there
are different types of planktons,
they are zoo plankton &
phytoplankton.
13. 13
Organism Observation
But, a lot of students discussed about plankton in KF, and I also searched
a lot of information from Internet myself, and I learnt that there are
some even smaller planktons which is called Bacterioplankton, and
Planktons eat other smaller planktons or minerals in water.
14. 14
Organism Observation
Then we took a glass bottom boat to observe underwater organisms. We
saw some soft corals and hard corals. We also saw a lot of sea urchins, sea
cucumbers, and some coral fishes, such as groupers, and crown fishes.
15. 15
Organism Observation
We also saw a kiln when we were leaving the Hoi Hai Wan marine park.
According to the instruction board, it was a traditional method to produce
lime by using live corals, we could still find some coral fossil around it.
16. 16
Threats of Hoi Hai Wan
Even though Hoi Ha Wan has such variety of marine organisms, and it is
protected by law, we think that pollution problem also impact Hoi Ha
Wan. Before I read this note from KF, I thought Hoi Hai Wan does not
have any waste and sewage disposal problems.
17. Threats of Hoi Hai Wan – Threat from
17
pollution
Then, I tried to find some evidence for my theory. And I checked the photos I took
during our trip in Hoi Ha Wan. This photos was taken during glass bottom boat
trip, it shows a tire on the seabed, and we also saw some rubbish. Besides , the
water was also not very clear, the visibility was just 3M according to our
measurement.
18. Similar Threat of Hoi Hai Wan in Hong Kong18
& The Fresh Water pond in Quebec
According to Brook’s note, I think both the HK Hoi Hai Wan and the fresh water
pond in Quebec are suffered from waste disposal problem.
19. Similar Threat of Hoi Hai Wan in Hong Kong19
& The Fresh Water pond in Quebec
I think Hoi Ha Wan Marine Park too is also suffered from chemicals disposal
problem. The reason why is because I think illegal fishermen use harmful
chemicals such as cyanide for fishing. These chemicals can kill all the corals and
marine creatures.
20. Similar Threat of Hoi Hai Wan in Hong Kong20
& The Fresh Water pond in Quebec
According to Karine’s note, pollution from chemicals is very serious in Hong
Kong. However, for oil leakage, I think nearly no oil leaks in Hoi Ha Wan because
there is no car nearby.
21. Further Inquiry 21
Though Hoi Hai Wan is very remote from city center, and it is protected under
law. However, we are not sure if the it’s ecology would be affected by climate
change, there are quite a number of notes talk about global warming, and here is
one of the KF notes talking about the harmfulness of Carbon dioxide.
22. 22
Further Inquiry
This is the first note I wrote. This is about the problem of carbon dioxide. At that
time, I was learning about global warming in English lessons, and I am interested
to know deeper in this topic, and so I wrote this note in KF.
23. 23
Further Inquiry
This is another note I wrote, I search a lot of information from books and internet
for resolving the problem of global warming, and I also posted it in KF.
24. 24
Further Inquiry
This is another note I wrote in KF about global warming. At first I thought that
global warming is only a kind of pollution. But now I find out that global warming
was cause by Carbon Dioxide, pollution and human beings. But, it is a very big
topic, and I hope I can study this problem, and then find a solution for it.
25. 25
Further Inquiry
I have learn a lot of things which are all related to global warming. Such as
atmosphere, carbon dioxide, carbon footprint, pollutions etc. I think it is very
good to share our own ideas with others. So I’m very happy that I can write notes
and share with you.
