1. Situation Analysis of the Tropical Depression:
At 07:00 on 10 December 1999 the centre of the tropical depression was situated at approximately 7.2o to 8.2o N latitude and 111.0o to 112.0o E longitude in the southern sea area of the Truong Sa Islands.
The strongest wind force near the centre of the tropical depression was measured at Beaufort Scale 6 (39 to 49 km per hour) with winds gusting to above Beaufort Scale 6.
Forecast: Over the next 24 hours, the tropical depression will move to west and west-south-west at a speed of 10 km per hour.
Due to the effects of the tropical depression, in the southern sea area of the Truong Sa Islands there will be cyclone at Beaufort Scale 6 with winds gusting to above Beaufort Scale 6. Sea will be very rough.
In addition, due to the effects of the tropical depression in combination with a zone of east winds, from this evening there will probably be medium-to-heavy rains in the Mid-Central, Southern Central, and Southern Central Highlands Provinces. The weather pattern will be happening very complicatedly.
2. Flood damage potential: HIGH
3. Situation Analysis of Floods on rivers in the Centre:
(According to Bulletin No. 181 DB/TV, issued by the Hydro-meteorological Service of Vietnam in Hanoi at 10:00 on 10 December 1999).
Flood water levels on rivers in the South-Central and Central Highlands Provinces are falling while remaining close to Alarm Level I, except the flood water level on the Kon River at Thach Hoa (above Alarm Level II). At 07:00 on 10 December 1999 the flood water level on the Huong River at Hue was at 0.85 m (0.35 m above Alarm Level I); the flood water level on the Thu Bon River at Cau Lau was as 1.85 m (below Alarm Level I); the flood water level on the Tra Khuc River at Tra Khuc was at 4.06 m (at Alarm Level III); the flood water level on the Kon River at Thach Hoa was at 6.87 m (0.37 m above Alarm Level II).
Tonight and tomorrow morning (11 December 1999) flood water levels on rivers in the provinces from Thua Thien-Hue to Binh Thuan will probably come up again.
4. Next information: The next information from the Standing Office of the Central Committee for Flood and Storm Control is expected at 14:30 PM, 12 December 1999.
5 More in-depth information: Contact the DMU Website at: URL: http://www.undp.org.vn/dmu/index.html
6 Times: All times are given in Vietnamese Standard Time.
2. Distinction of river flood alarm levels:
Alarm Level I Possible flood condition - River water level is high; threat to low height embankments; flooding of very low lying areas; infrastructure safe.
Alarm Level II Dangerous flood condition - Flood plane inundation expected; towns and cities still generally protected by flood defences; high velocity River flows pose danger of bank and dyke erosion; bridge foundations at risk from scour; infrastructure generally safe.
Alarm Level III Very dangerous flood condition - All low lying areas submerged, including low lying areas in cities and towns; safety of River protection dykes in jeopardy; damage to infrastructure begins.
Alarm Level III + Emergency flood condition - General and wide spread uncontrollable flooding; dyke failure a certainty and probably uncontrollable; damage to infrastructure severe.
3. Storm Control Activities of the Standing Office of the Central Committee for Flood and Storm: No new directives issued by the Standing Office of the CCFSC to DMU as of 10 December 1999.
English translation prepared by the UNDP Project VIE/97/002; 10 December 1999.
Note: Every effort has been made to provide a complete and accurate translation of this unofficial Ministry communication; however, in all cases, the original Vietnamese language document is the unofficial statement of the Ministry of Agriculture and Rural Development of the Socialist Republic of Vietnam.