Title: WATER BALANCE OF SLOVENIA 1971 2000
1WATER BALANCE OF SLOVENIA 1971 2000
Peter Frantar mag. Marjan Bat Mojca Dolinar Bla
Kurnik Environmental Agency of the Republic of
Slovenia Ljubljana, Slovenia
2INTRO
- WHY WATER BALANCE 1971 2000 ???
- CLIMATE CHANGES
- MORE ACCURATE DATA (as 61-90)
- USE OF GIS TOOLS
- BASE FOR YEARLY WB
- UNDERSTANDING OF PROCESSES ...
3GEO LOCATION POSITION
4GEOGRAPHICAL VARIETY
PANONIAN
ALPS
KARST, DINARIC
ADRIATIC
5MAJOR WATERSHEDS
MURA
DRAVA
SAVA
SOCA
REST ADRIA
6WATER 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.
7CLIMATE MONITORING (RR, ETP)
8PRECIPITATION
- CORRECTED PRECIPITATION FOR DIFFERENT SLOVENIAN
GEOREGIONS - DATA ALSO FROM NEIGHBOUR STATES
Relative frequency distribution of precipitation
measuring sites and DEM according to altitude
classes
9PRECIPITATION 1971 - 2000
800 mm
3500 mm
1300 mm
2700 mm
1000 mm
10EVAPOTRANSPIRATION
- ONLY FEW DIRECT MEASUREMENTS
- CALCULATED VALUES
11EVAPOTRANSPIRATION 71-00
750 mm
lt 500 mm
gt 800 mm
gt 800 mm
12RUNOFF
- 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
13HYDROLOGICAL MONITORING
ALL STATIONS - gt 700
14HYDROLOGICAL MONITORING
WORKING STATIONS cca. 200
15HYDROMETRICAL UNITS
SELECTION
16SPECIFIC RUNOFF
lt 10 lt/s
gt 60 lt/s
17WATER BALANCECONCLUSIONS
- IMPORTANT INTERDEPENDENCE OF ALL MAJOR WB
ELEMENTS - PRECIPITATION
- EVAPORATION
- RUNOFF
18WHATS 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