City University of Hong Kong
Photo: Ellen Shek/WWF
Near-real-time marine environmental data from CityU Databuoys, Hoi Ha Wan
The Laboratory at Hoi Ha Wan is temporarily closed. Data is only available until 23 August. No restart date is yet available.
Owing to braodband link outage during the recent typhoons, some of the data is inconsistent and missing, especially between 28 June and 25 July.
The marine and metereological data collected at Hoi Ha Wan is made freely available to schools, universities and other interested persons for their personal/educational use. The data should not be used for decision making.

The map below indicates the various instruments and data collection devices deployed at Hoi Ha Wan over the past 5 years. The databuoys are designed to operate sensors at five depths - surface, 1m, 2m, 5m and 7m. They currently deploy temperature, salinity and light intensity instruments, but will be enhanced with dissolved oxygen and pH later.  Three buoys are currently deployed, as shown on the map - DB1, DB2 and DB3. As part of the project, we are also investigating the use of wave energy to power the buoys - see link.
On  the map DB1, DB2 and DB3 are the positions of the databuoys, C1 and C2 are where the 24/7 cameras were located, SB1 and SB2 are where the Seabird sensor arrays were located. W1 is where the weatherstation is. Cameras will soon be installed under the MLC.


    
Links

 (ex) City University of Hong Kong Marine Science and Engineering Laboratory, Hoi Ha Wan

Real-time weather data from the MLC (currently offline owing to temporary closure of the lab)

Real-time video from underwater cameras under the Marine Life Centre  (under construction)

Archived video and environmental data (under construction)

Wave energy demonstration project

   WWF Hong Kong

WWF/CityU Underwater Robot Challenge

The buoys are currently under beta-testing.  Data since 25 July is in a new format, where every sensor is shown. If the buoy or sensor is not connected, owing to maintenance/upgrade etc., then there will be a series of 3 zeros in the data fields. The area around the Marine Life Centre is designated area #1 to allow for future expansion of the system.

Current status of instrumentation:
Databuoy #1
 Databuoy #2
 Databuoy #3
 Weather station
 Tide gauge

Status: Offline/uplifted.
Notes: Upgrading of software, and re-calibration of sensors. Some older data from this buoy is unreliable!!
Levels:  1 - surface
                2 - 1m
                3 - 3 m
                4 - 5m
Mean water depth: 7m
Position: 22o 27' 45.09" N
                 114o 20' 00.95" E
Status: Offline/uplifted
Notes: Some in-situ upgrade of software to be carried out
Levels:  1 - surface
                2 - 1m
                3 - 3 m
                4 - 5m
                5 - 7m
Mean water depth: 9m
Position: 22o 27' 47.13" N
                 114o 20' 03.36" E

Status: Offline/uplifted
Notes:
Levels:  1 - surface
                2 - 1m
                3 - 3 m
                4 - 5m
                5 - 7m
Mean water depth: 9m
Position: 22o 27' 51.04" N
                 114o 20' 01.12" E
Status: Offline/deployed
Notes: Owing to an unreliable data connection this data is intermittent. There is no data available between 25 June and 27 July 2008, as the broadband connection was unreliable during this period.
Position:  22o 27' 46.61" N
                 114o 20' 00.36" E

Status: Offline
Notes:
Position: 22o 27' 46.61" N
                 114o 20' 01.95" E


22 August 2008 23 August 2008 24 August 2008 25 August 2008
Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data
18 August 2008
19 August 2008
20 August 2008
21 August 2008
Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data
14 August 2008
15 August 2008
16 August 2008
17 August 2008
Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data
10 August 2008
11 August 2008
12 August 2008
13 August 2008
Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data
6 August 2008
7 August 2008
8 August 2008
9 August 2008
Buoy data
Weather data
 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data
2 August 2008
3 August 2008
4 August 2008
5 August 2008
Buoy data
Weather data
 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data
29 July 2008
30 July 2008
31 July 2008
1 August 2008
Buoy data
Weather data
 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data
25 July 2008
26 July 2008
27 July 2008
28 July 2008
Buoy data
Weather data
 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data



Older archived data
25 June
26 June
27 June
28 June
Buoy data
Weather data
 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data
21 June
22 June
23 June
24 June
Buoy data
Weather data
 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data
17 June
18 June
19 June
20 June
Buoy data
Weather data
 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data
13 June
14 June
15 June
16 June
Buoy data
Weather data
 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data
5 June 2008
6 June 2008
7 June 2008
8 June 2008
Buoy data
Weather data
 Buoy data
Weather data		 Buoy data
Weather data		 Buoy data
Weather data

The Hoi Ha Wan Databouy project is financed by the Environment and Conservation Fund, Environmental Protection Department. Government of Hong Kong SAR