1. Hungarian remarks Zoltán Simonffy Ministry of Rural Development
Expert Group on Water Scarcity and Drought (EG WSD) 
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
Hungarian remarks
Zoltán Simonffy
Ministry of Rural Development
Hungary
Department of Sanitary and Environmental Engineering
Budapest University of Technology and Economics

2. of surface and groundwater resources
Expert Group on Water Scarcity and Drought (EG WSD) 
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
Separation
of surface and groundwater resources

3. Relevant spatial and temporal scales of water availability:
Expert Group on Water Scarcity and Drought (EG WSD) 
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
Relevant spatial and temporal scales of water availability:
Surface water: Groundwater:
Planning units
Surface catchment
Groups of GWBs
Subsurface catchment
Considerable differences in lowland,
however they can be treated together
Low flow period (August) Longterm annual average

4. Available water resources (HU):
Expert Group on Water Scarcity and Drought (EG WSD) 
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
Available water resources (HU):
For surface water bodies, in August (longterm, at least 10 years):
RWA_sw = Qaug80 + Inflow_upstr80 + ReleaseRes + Return – Envflow
For groundwater catchments, LTTA:
RWA_gw = Recharge + (Inflow - Outflow) + Return - WaterD_GWDE
Connection between surface and groundwater resources:
recharge to grw from surface waters (bankfltration, art. recharge)
inversely: baseflow,
retuned grw. abstraction to surface water

5. Water scarcity evaluation (HU):
Expert Group on Water Scarcity and Drought (EG WSD) 
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
Water scarcity evaluation (HU):
For surface water bodies, in August (longterm, at least 10 years):
Bal_ sw = RWA_sw – Demand_sw (~ TWA_sw_representative!!)
Since RWA_sw corresponds to 80% duration,
probability of water scarcity is 20%, if Bal_sw <0.
For groundwater catchments, LTTA:
Bal_gw = RWA_gw – TWA_gw - water scarcity if Bal_gw < 0 or
WEI_gw = TWA_gw/RWA_gw - water scarcity if WEI_gw < 1 (0.9)

6. Environmental flow Expert Group on Water Scarcity and Drought (EG WSD)
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
Environmental flow

7. Type of rivers (20 types in HU)
Expert Group on Water Scarcity and Drought (EG WSD) 
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
Environmental flow:
Water courses: ecological minimum flow
in lowflow period
Type of rivers (20 types in HU)
Diversity in flow:
meandering,
gurgles,
slugish stretches
Estimation of minimum flow by
hydrodynamical calculation (Chézy) for every river type
b = 0.45 – 0.6
WR_sw = b . Qlowflow

8. Groundwater dependent ecosystems - LTAA
Expert Group on Water Scarcity and Drought (EG WSD) 
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
Environmental flow:
Groundwater dependent ecosystems - LTAA
Springflow: WR_sw . c
Baseflow: WR_sw . c
c: quotient of LTAA and lowflow period
depends on the morphology and type of aquifer

9. acc. to required fluctuation
Expert Group on Water Scarcity and Drought (EG WSD) 
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
Environmental flow:
Groundwater dependent ecosystems - LTAA
Surplus of evapotranspiration from groundwater at the wetland
and in the surrounding area (too)
Wetlands, terrestrial ecosystems:
Swamp
Swamp-meadow
High water demanding marsh
Marsh-meadow
Wet salt-marsh
Dry salt-marsh
Riverside forest
Gw demanding forest
ETA needed from grw.
Critical depth
acc. to required fluctuation

10. 2003 (dry), 2006 (average), August 2003 (dry), August 2006 (wet)
Expert Group on Water Scarcity and Drought (EG WSD) 
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
WEI test in Hungary
2003 (dry), 2006 (average), August 2003 (dry), August 2006 (wet)

11. WEI test in Hungary No problem
Expert Group on Water Scarcity and Drought (EG WSD) 
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
WEI test in Hungary
No problem
Kapos shows more vulnerability than the country (medium catchment without transboundary connection).
August is more sensitive than the year.
Kettos-Koros is similar to national scale, annual evaluation (large catchment in abroad), but more sensitive in August (no considerable inlow from Romania).

12. Expert Group on Water Scarcity and Drought (EG WSD) 
1st Meeting of the Technical Working Group (TWG), Prague, December 2011.
WEI test in Hungary
Increasing WEI, but in the reality vulnerability does not increase due to cooling water and in situ water use.