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WATER BALANCE OF SLOVENIA 1971 2000

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Environmental Agency of the Republic of Slovenia ... KARST, DINARIC. ADRIATIC. MAJOR WATERSHEDS. SAVA. DRAVA. MURA. SOCA. REST ADRIA. WATER BALANCE 71-00 ... – PowerPoint PPT presentation

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Title: WATER BALANCE OF SLOVENIA 1971 2000


1
WATER BALANCE OF SLOVENIA 1971 2000
Peter Frantar mag. Marjan Bat Mojca Dolinar Bla
Kurnik Environmental Agency of the Republic of
Slovenia Ljubljana, Slovenia
2
INTRO
  • WHY WATER BALANCE 1971 2000 ???
  • CLIMATE CHANGES
  • MORE ACCURATE DATA (as 61-90)
  • USE OF GIS TOOLS
  • BASE FOR YEARLY WB
  • UNDERSTANDING OF PROCESSES ...

3
GEO LOCATION POSITION
4
GEOGRAPHICAL VARIETY
PANONIAN
ALPS
KARST, DINARIC
ADRIATIC
5
MAJOR WATERSHEDS
MURA
DRAVA
SAVA
SOCA
REST ADRIA
6
WATER BALANCE 71-00
INPUT OUTPUT 0 BASIC EQUATION P E Q
dS USED EQUATION P E Q PREPOSITON The
water withdrawals and the storage changes can be
neglected due to long term period and small
amounts compared to overall water quantities.
7
CLIMATE MONITORING (RR, ETP)
8
PRECIPITATION
  • CORRECTED PRECIPITATION FOR DIFFERENT SLOVENIAN
    GEOREGIONS
  • DATA ALSO FROM NEIGHBOUR STATES

Relative frequency distribution of precipitation
measuring sites and DEM according to altitude
classes
9
PRECIPITATION 1971 - 2000
800 mm
3500 mm
1300 mm
2700 mm
1000 mm
10
EVAPOTRANSPIRATION
  • ONLY FEW DIRECT MEASUREMENTS
  • CALCULATED VALUES

11
EVAPOTRANSPIRATION 71-00
750 mm
lt 500 mm
gt 800 mm
gt 800 mm
12
RUNOFF
  • runoff data is considered the most reliable and
    accurate data
  • procedure selection of water gauging stations
    (monthly average discharge), correlations of
    missing values,...
  • selection of hydrometrical units
  • calculation of specific discharge

13
HYDROLOGICAL MONITORING
ALL STATIONS - gt 700
14
HYDROLOGICAL MONITORING
WORKING STATIONS cca. 200
15
HYDROMETRICAL UNITS
SELECTION
16
SPECIFIC RUNOFF
lt 10 lt/s
gt 60 lt/s
17
WATER BALANCECONCLUSIONS
  • IMPORTANT INTERDEPENDENCE OF ALL MAJOR WB
    ELEMENTS
  • PRECIPITATION
  • EVAPORATION
  • RUNOFF

18
WHATS NEXT...
  • COMPARISON OF ALL ELEMENTS
  • DEFINITIONS OF ERRORS AND CORRECTIONS
  • DETAILED STUDIES
  • PUBLICATION
  • YEARLY WATER BALANCE CALCULATIONS

19
... MORE INFO IN THE ARTICLE and on
internet www.arso.sigov.si THANK YOU
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