According to Bulletin No. 60DB/TVBBO and Bulletin No.48DB/TVTNBO, issued by the Vietnam Hydro-meteorological Service in Hanoi at 16:00, 27 July 2004
1. Flood Damage Potential:
Low in the northern, central and southern river systems.
2. Situation Analysis of Flood on Rivers in Vietnam:
NORTHERN RIVER SYSTEMS:
Red River System:
The flood water levels on the Red River System are decreasing. At 7:00 on 27 July 2004, the flood water level on the Red River at the Hanoi Gauging Station was at 8.87 meters.
Forecast:
The downstream flood water level on the Red River at the Hanoi Gauging Station will continue to recede rapidly. In the morning of 29 July 2004, the flood water level at the Hanoi Gauging Station will likely be at 7.50 meters.
Thai
The flood water levels on the Thai Binh River System are lowering. At 7:00 on 27 July 2004, the flood water level at the Pha Lai Gauging Station was at 5.19 meters, that at the Dap Cau Gauging Station at 5.57 meters, that at the Phu Lang Thuong Gauging Station at 5.43 meters, and that at the Luc Nam Gauging Station at 5.24 meters (alla below Alarm Levels III).
The flood water levels on the Thai Binh River System will continue to decrease. By 19:00 on 28 July 2004, the flood water level at the Pha Lai Gauging Station will be at 4.30 meters.
CENTRAL RIVER SYSTEMS:
- Ma River (Giang Gauging Station-Thanh Hoa Province): 0.91 meter (much lower than Alarm Level I = 3.50 meters),
- Ca River (Nam Dan Gauging Station-Nghe An province): 3.98 meters (1.42 meter below than Alarm Level I = 5.40 meters),
- La River (Linh Cam Gauging Station): 0.91 meter,
- Ca Ty River (Muong Man Gauging Station): 3.16 meter,
- La Nga River (Ta Pao Gauging Station-Binh Thuan Province): 119.49 meter (0.49 meter above Alarm Level I = 119.00 meter),
- Serepok River (Ban Don Gauging Station-Dak Lak Province): 169.02 meter (0.58 meter lower than Alarm Level I = 169.60 meter).
On 28 July 2004, the flood water levels on rivers in Thanh Hoa Province and in the Central Highlands will be fluctuating slightly; the flood water levels on rivers in Binh Thuan Province and the downstream flood water levels on rivers in the provinces of Nghe An and Ha Tinh will continue to increase slowly.
SOUTHERN RIVER SYSTEMS:
The upstream flood water level on the Mekong River is increasing slowly. On July 26, 2004, the highest flood water level on the Tien River at the Tan Chau Gauging Station was at 1.95 meter and that on the Hau River at the Chau Doc Gauging Station was at 1.57 meter.
The upstream flood water level on the Mekong River will continue to increase. By 29 July 2004, the flood water lever at the Tan Chau Gauging Station will likely be at 2.10 meters; and that at the Chau Doc Gauging Station at 1.70 meter.
3. Next information: The next information from the Standing Office of the Central Committee for Flood and Storm Control is expected at 15:00, Wednesday, July 28, 2004.
4. More in-depth information: URL: http://www.undp.org.vn/dmu/index.html
5. Times: All times are given in Vietnamese Standard Time (GMT+7).
Translated by Ngo Quang Minh (DMU); Edited by M. Silver (STA)
DISTINCTION OF 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.
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