Alsó -Tisza vidéki Környezetvédelmi és Vízügyi Igazgatóság

Experiences of the continuous water balance Experiences of the continuous water balance assessment in Hungaryassessment in Hungary

UNECE WorkshopUNECE Workshop1-2. July 2008.1-2. July 2008.

AmsterdamAmsterdam

Alsó-Tisza vidéki Környezetvédelmi és Vízügyi IgazgatóságAlsó-Tisza vidéki Környezetvédelmi és Vízügyi IgazgatóságDIRECTORATE FOR ENVIRONMENTAL PROTECTION AND WATER MANAGEMENT OF LOWER TISZA DISTRICTDIRECTORATE FOR ENVIRONMENTAL PROTECTION AND WATER MANAGEMENT OF LOWER TISZA DISTRICTUMWELTSCHUTZ- UND WASSERWIRTSCHAFTDIREKTION NIEDER TISZA TAL UMWELTSCHUTZ- UND WASSERWIRTSCHAFTDIREKTION NIEDER TISZA TAL

H-6720 Szeged, Stefánia 4. e-mail: H-6720 Szeged, Stefánia 4. e-mail: [email protected]


Postacím: H-6720 Szeged, Stefánia 4. Telefon: 62 / 599-500 * e-mail: Postacím: H-6720 Szeged, Stefánia 4. Telefon: 62 / 599-500 * e-mail: [email protected]

1. Where do we 1. Where do we s stand….tand….

1. Where do we stand: what is the issue?

Hungary:

• Situated in the Carpatian basin.


Postacím: H-6720 Szeged, Stefánia 4. Telefon: 62 / 599-500 * e-mail: Postacím: H-6720 Szeged, Stefánia 4. Telefon: 62 / 599-500 * e-mail: [email protected]



Hungary:

• More than 90% of the surface waters come from aboard.


Postacím: H-6720 Szeged, Stefánia 4. Telefon: 62 / 599-500 * e-mail: Postacím: H-6720 Szeged, Stefánia 4. Telefon: 62 / 599-500 * e-mail: [email protected]@atikovizig.hu



Hungary – serious drought events:

• During the last century on average in 3-4 years:

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1011121314151617181920

1931

1934

1937

1940

1943

1946

1949

1952

1955

1958

1961

1964

1967

1970

1973

1976

1979

1982

1985

1988

1991

1994

1997

2000

2003

Years

PAI (°C/100mm)

PAI values on Kecskemét neighbourhood

PAI values national averages

Mov ing av erage

1990





Hungary – serious drought events:

• During the last century on average in 3-4 years:

Damages:• 1990 – 50 billion HUF• 1992 – 30 billion HUF• 1993 – 50 billion HUF• 2000 – 30 billion HUF• 2003 – 40 billiion HUF

1992199320002003



2. What are the implemented solutions?2. What are the implemented solutions?

2. What are the implemented solutions?

Hungary – continuous water balance assessment:

2 parts:

1. General overview:

• Precipitation : average values, differences from the averages,

• Air temperatue : extereme values, average values,

• Soil moisture,

• Ground water: actuall levels, differences form the averages,

• Excess water status: inundated area by excess waters.






2 parts:

2. Forecasts:

2.1. Meteorological: cooperation with Hungarian Meteorological Service,

2.2. Water balance conditions: Continuous Water Balance Index (CWBI),

2.3. Drought forecast: PAI – PDI

2.4. Excess water forecast.






2.2. Continuous Water Balance Index (CWBI):

depends on:

• Increase the CWBI: Previous 12 month precipitation summary,

• Decrease the CWBI: evapotranspration (calculated value).

Evaluation of CWBI:

• If the CWBI < 1 => dry period

• If the CWBI < 1 => wet period.






2.3. Drought forecast: PAI – PDI: 60 stations

depends on:

Evaluation of PAI-PDI:

• 6-9 => mild,

• 8-10 => medium,

• 10-12 => heavy,

• 12< => extereme

PDI=ct*cp*cgw*PDIo



3. What are the ilessons learned?3. What are the ilessons learned?

3. What are the lessons learned?

What was the main goals?

To give background for the preparedness to the forecasted changes of water balances OK !!!

To assure the cheap and widely access OK !!!



3. What are the ilessons learned?3. What are the ilessons learned?

3. What are the lessons learned?

What is still unsolved?

Increase the density of the monitoring network. Assessment on local level

To assure the connection with other land-use database (land coverig)

Increase the „sensitivity” of the forecasts.

To assure the background for prevention measures (water sharing between basins, irrigation, water retention…)

Prevention and elimination of the drought’s damages.



Thanks for your attention !Thanks for your attention !

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Alsó -Tisza vidéki Környezetvédelmi és Vízügyi Igazgatóság