transboundary coordination according to the fd …transboundary coordination according to the fd...
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"Transboundary coordination according to the FD
Directive in the shared river basins of Greece”
Katerina Triantafyllou, ECOS Consulting S.A.
Technical Consultant, Special Secretariat for Water
Hellenic Ministry of Environment, Energy and
Climate Change
Workshop on Transboundary Issues
Budapest
March 31st April 1st
Greek territory is divided into 14
RBDs, 5 of these are identified
as International
International RBDs are with
Albania, Former Yugoslav
Republic of Macedonia, Turkey
(non-EU countries) and
Bulgaria a MS of EU
International River Basin Districts and
Transboundary River Basins in Greece (1/3)
International River Basin Districts and
Transboundary River Basins in Greece (2/3)
Greek international RBDs are:
GR05 “EPIRUS ” : RB of Aoos/Vjosa river, shared with Albania
GR09 “WESTERN MACEDONIA”: sub-basin of lakes Prespa
(shared with FYROM and with Albania) and part of the upstream
catchment of Axios/Vardar river, shared with FYROM
GR10 “CENTRAL MACEDONIA”: downstream part of the RB of
Axios/Vardar river, shared with FYROM
GR11 “EASTERN MACEDONIA” : downstream part of the RB
Strymon/Struma, shared with Bulgaria (RBD BG 4000)
GR12 “THRACE” : RB of Nestos/Mesta, shared with Boulgaria,
and RB of Evros/Maritza/Meric, shared with Boulgaria (RBD BG
3000) and Turkey
International River Basin Districts and
Transboundary River Basins in Greece (3/3)
Aoos river basin: no
APSFR, catchment on
the Greek side located
upstream
APSFR in transboundary River Basins in
Greece (1/6)
Prespa lakes sub basin a
riparian area on the East of
the lakes
Axios river basin :
upstream (GR09) the
lowlands of the basin
downstream (GR10) almost
the entire Axios catchment on
the Greek side
APSFR in transboundary River Basins in
Greece (2/6)
Strymon river basin
all the lowlands of the
catchment on the Greek
side from the border up to
the mouth of the river
Nestos river basin the
lower parts of the
catchment
APSFR in transboundary River Basins in
Greece (3/6)
Evros river basin all the
lowlands along the river from
the border with Bulgaria to the
mouth of the river
APSFR in transboundary River Basins in
Greece (4/6)
We note that:
In all the cases of APSFR shared catchments with other
countries are located upstream and only in Evros river
basin shared catchments (with Turkey ) are also side by
side
Greek transboundary river basins shared with Member
States of the EU are those of Strymon, Nestos and Evros,
shared with Bulgaria which cover the upstream part of the
river basins
In the case of Axios, Strymon and Evros identified APSFR
are extended up to the border line. In the case of Nestos
APSFR are far away from the border. According to FD
(Article 8.1) Member States shall ensure coordination
for Flood Risk Management Plans at International
River
APSFR in transboundary River Basins in
Greece (5/6)
APSFR in transboundary River Basins in
Greece (6/6)
Coordination for FD with Bulgaria 2010 Joint
Declaration Joint Expert Working Group for the
cooperation on water and environment in
transboundary basins Joint Sub Working Group for the
exchange of technical data and experience on the
implementation of the requirements of Directives
2000/60/EC and 2007/60/EC
Cooperation also with Turkey in the management of the
transboundary river of Evros 2010 Joint Declaration
Joint Committee for the cooperation for the Evros river
Joint Working Group for exchange of information and
data on the river Evros
Coordination according to the Floods
Directive 2007/60/EC
Exchange of views on data, applied methodologies, criteria
for risk evaluation and identified APSFR
Exchange of data. Greece submitted to Bulgaria texts
uploaded to CIRCA in English and shape-files with historical
flood events and APSFR
Very limited available time for coordination. Analysis to
finish by the end of 2011 and data to CIRCA by March 2012
Preliminary Floods Risk Assessment (1/4)
Different criteria for risk classification non corresponding
APSFR at the border
Greece conservative approach all urban settlements and
almost all cultivated land of high risk in case of flooding;
Bulgaria risk classification for each flood location after
public consultation
Greek side identified 4 APSFR at the border with Bulgaria in
the river basins of Evros and its tributaries Ardas and
Erythropotamos and in the river basin of Strymonas.
Bulgaria side identified only one APSFR close to the border
in the main branch of Evros river.
. FRMP shall be coordinated also in the case of non
corresponding APSFR at the border ?
Preliminary Floods Risk Assessment (2/4)
to :
Different methods for delineation of APSFR
Greece delineates ASFRP as polygons (broader areas
riparian to the river) ; Bulgaria as river stretches of water
bodies
Differences in the width of the identified area on both sides
of the river technical and not critical problem as flooded
areas are identified with accuracy at the stage of flood
hazard maps
Important to agree on the classification criteria for risk
evaluation and this is not easy as there are differences in
priorities between the two countries
Preliminary Floods Risk Assessment (3/4)
to :
Differences in public information and consultation
Both sides made PFRA data available to the public
Greece consultation of AFRP with authorities
Bulgaria open presentations of ARFRP to the public
Preliminary Floods Risk Assessment (4/4)
Exchange of views and information on flood scenario,
terrain data, hydrological data and analysis, flood routing
models, flood risk evaluation
Very limited available time for coordination. Analysis to
finish by the end of 2013 and data to CIRCA by March 2014
Elaboration of FHRM is a complicated new process no
previous experience difficulties to apply coordinated
approaches at least at the 1st cycle of FD implementation
Floods hazards and risk maps (1/6)
:
Differences in Hydrological Analysis
Return period of flood scenarios : high probability 50 years
in Greece, 20 years in Bulgaria; both return periods on the
border segment of Evros to be considered
Hydrological data and methods of analysis.
Greece synthetic flood hydrographs (rainfall data up 2011)
and runoff computation (models supported by GIS).
Discharge and river water level data model calibration (except in the case of Evros river where hydrometric measurements are used)
Bulgaria processing of hydrometric measurements (period
1961-1990)
Floods hazards and risk maps (2/6)
:
Differences in Hydrological Analysis
Different measurement stations, Different measurement
periods, Different methodologies Different flood events
on the border.
Need for future coordination on flood measurements (maybe
shared stations)
+
Maximum discharge spatial distribution and hydrographs
composition assumptions ?
+
Influence of upstream existing retention works on flood
hydrographs and peak discharge ? important in Ardas
tributary of Evros where three upstream dams exist on
Bulgarian territory
Floods hazards and risk maps (3/6)
:
Differences in Terrain Data
Greece existing DTM + bathymetrical measurements for river cross sections (except Evros river where DTM supplemented by satellites images) ;
Bulgaria DTM models based on LiDAR and geodetic surveys
Used cross-sections at the segment of the Evros river forming the borderline with Bulgaria will be exchanged between the two parties
Each country works according to relevant past investments and financial possibilities. It’s very difficult in the first cycle of FD implementation to adopt a common approach
Floods hazards and risk maps (4/6)
:
Differences in flood routing modeling
Greece quasi-2D hydraulic simulation models equivalent to LisFlood + scenarios with potential levees failure. Evros river
MIKE-FLOOD model of DHI
Bulgaria 1D and 2D models according to terrain slope
Establishment of Flood Risk Maps
Methodology for Flood Risk Maps under development very difficult to establish coordination before developing sufficient experience on the subject
Floods hazards and risk maps (5/6)
:
Case of Evros river basin
cooperation with Bulgaria (upstream) in line with the requirements and milestones of the Floods Directive
cooperation with Turkey (sharing river segment) with exchange of hydrometric measurements (both countries give much emphasis on jointly addressing the problem of floods)
Floods hazards and risk maps (6/6)
:
Floods Directive opportunity for common approaches in FRM on the level of international RBDs (concrete context and implementation schedule) risk reduction by coordinated measures
Greece 4 neighboring countries (1 Member State of EU) + coordination issues many and complex
1st cycle of FD implementation FRMPs for the parts of the International RBDs within its territory
+
coordination as far as possible at the level of the international RBDs
1st cycle of FD implementation in the shared
RBs basins (1/2)
:
Coordination crucial for flood risk reduction. Case of RB Evros activities in each part influence flood events and risk. Open issues:
upstream reservoirs operation
design standards of flood protection works
riparian lands and activities on flood plains
risk reduction priorities
1st cycle of FD implementation in the shared
RBs basins (2/2)
Thank you for your attention