hydro-meteorological network Asian MONSOON YEAR 2008 (amy08) Workshop Bali, Indonesia, September 03 - 04, 2007 hydro-meteorological network of Vietnam in AMY08 Nguyen Thi Tan Thanh National Hydro – Meteorological Service of Vietnam (VNHMS) ktcaokhong@hn.vnn.vn

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

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

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

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

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

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

3. Operational H-M Models in NCHMF of Vietnam

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

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

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

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.

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

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

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...

Thank you very much for your attention!