1. hydro-meteorological network
Asian MONSOON YEAR 2008 (amy08) Workshop
Bali, Indonesia, September , 2007
hydro-meteorological network
of Vietnam in AMY08
Nguyen Thi Tan Thanh
National Hydro – Meteorological Service of Vietnam (VNHMS)

2. CONTENT Introduction Network of Stations in AMY08
Operational H-M Models in NCHMF
4. Collaboration in MAHASRI

3. 1. Introduction
Up to now, Vietnam H-M network has more than 1200 stations and gauging places.
Very limited number of stations are in the GBSN or RBSN: 25 synoptic stations, 03 upper – air stations are sending TA and TB, 02 PILOT stations.
Need to know the standard data requirement for AMY08, which can contribute by all countries.
Improving the operational H-M forecasting system is a strong demanding to VNHMS

4. 2 – Network of Stations in AMY08
2.1. Meteorological station network
8obs/day, all Met.elements, except Solar Radiation.
- AWS in Danang city
- 57 class I
- 7 class II
Among this:
- 25 International reported stations
- 39 National synoptic reported Stations

5. 2 – Network of Stations in AMY08 (cont.)
2.2. Upper – Air Station Network:
- 5 radiosounding stations: 2obs./day at 00Z and 12Z, only 3 stations international reported TA, TB, TC, TD + 2 new stations + higher spatial resolution.
- 8 PILOT stations: 00Z
2.3. Weather Radar Network
- 3 conventional weather radar stations in the Northern part of VN: 3 PPI – 256 km scans at 0.5, 1.5, 2.5deg. in 10min
- 3 DWSR in the Southern part of VN: 14 elevations volume scan in 240km

7. 2 – Network of Stations (cont.)
2.4. Marine H-M Station Network
- 11 stations on island
5 coastal stations
- 1 Research vessel: 2 campaigns/year in 4 months

8. JEPP-Indochina Network
1 AWS on 900m mountain area, 30km from Danang
34 automatic rain-gauges in the Middle part of Vietnam
9 automatic water level sensors in 03 river systems

9. 3. Operational H-M Models in NCHMF of Vietnam

10. 3.1. International GTS channels
HaNoi - MOSCOW: 100 bps
HaNoi -Bejing: 75 bps
HaNoi - Bangkok: 1200bps
PCVSAT: HaNoi - Bejing: 9600bps

11. 3.2. NWP models
Run operationally HRM (28 km) since 5/2002, (14km) since 7/2004.
ETA model run (22 km) in experimental mode since June 2005, semi-operational (May, 2006)
Barotropic models for TC tracking (BARO & BAR) for typhoon season 2003, 2004, 2005, 2006
Post processing (display & diagnostic output): GSM(JMA), TLAPS (BoM), AVN(NCEP), NOGAPS, ECMWF ...
Other software to serve as tools for forecasters

12. PC-based LINUX-OS 4 nodes (8 CPU) Ftp- Server NCHMF RHMC (Archive GME)
FLOW CHART OF THE OPERATIONAL GME-HRM MODEL
at NCHMF
Ftp- Server NCHMF
(Archive GME)
RHMC
Output
LAN-NCHMF
Internet
WEB site
Input
Output
PC-based
LINUX-OS
4 nodes (8 CPU)
Run_Gme2hrm
Initial & Boundary data (GME) taken from DWD(~165 MB/1 run)
Run_ Hrm
Output
(Grib, ASCII)
Graphics
Other models (WAM, Storm Surge)
Hydrological Model

13. Hydrologic Model FIRR using 4 combined methods:
3.3. Hydrological Forecast
Hydrologic Model FIRR using 4 combined methods:
Unit Hydrograph, Duhamel Integral, Kinematic Wave vµ Reservoir Regulation.
FIRR
FIRR
Ad river
Thao river
Lo river
Rainfall
Rainfall
Rainfall
Yªn B¸i
Tuyªn Quang
Reservoir Regulation
HoaBinh R.
Hµ Néi
Inflow forecast into Hoa Binh Reservoir on Da River; flow at YenBai on Thao River, at TuyenQuang on Lo River and HoaBinh reservoir regulation.

14. Observed and forecasted rainfall
Distributed Model MARINE (France) with DEM và GIS, rainfall-runoff forecast inflow into Hoa Binh Reservoir on Da River
Observed and forecasted rainfall
DEM
Forest Coverage Map
MARINE MODEL
Out put Q~t

15. Short-term flood forecasting software for the Red River system with lead time 6 – 48hours; using rainfall-runoff, related water level/discharges methods, SSARR model and step multi-regression
Main menu of the Software
Icons of zoom in, zoom out, move screen
Coordinates of mouse pointer
Check box to display/hide Hydro-Met stations
Map of river network, hydromet stations, diverge, retard areas
Forecasting year
Flood forecasting scheme for upstream Red River
Tools to zoom in. zoom out, move screen
Popup menu

16. 4. International Collaboration
To develop a National Data Integration System
Higher temporal resolution of data can be conducted with the financial support.
Implementation of 4D - Data Assimilation.
4. To improve the operational numerical models in NCHMF of Vietnam
5. To improve HM operational forecasting technology, especially the forecasts of weather disturbances, floods and flash floods
6. Capacity building: training, workshop, education, exchange scientists etc...

17. Thank you very much for your attention!