Prefecture of Laconia Management of Climate changes in Evrotas River, Southern Greece Tzoraki O., Christodoulou A., Demetropoulou L., Gamvroudis Ch., Papadoulakis V. &. Nikolaidis N. 07 October 2009 Odense
Outline STATE OF THE ART FLOOD MANAGEMENT DROUGHT MANAGEMENT MEASURES
Temperature, oc Precipitation (mm) 20,5 20,0 19,5 19,0 18,5 18,0 17,5 17,0 16,5 16,0 1400,0 1200,0 1000,0 800,0 600,0 400,0 200,0 0,0 1973 1975 1973 1975 Annual Average Temperature - Rodos Station 1977 1979 1981 1983 1977 1979 1981 1983 1985 1987 1989 1985 1987 1989 Total Annual Precipitation Year 1991 1993 Annual Temperature 1991 Year y = 0,0349x + 18,389 1995 1997 1999 2001 2003 2005 Linear (Annual Temperature) 1993 1995 1997 1999 2001 2003 2005 Linear (Total Annual Precipitation) y = -0,7713x + 719,56 Ανάλυση Βροχόπτωσης 1973-1987 Average= 686 mm Standard Deviation= 129 mm 1988-2006 Average= 722 mm Standard Deviation= 272 mm
Precipitation in the last 50 years
A. RISK ASSESSMENT Identification of Risk Sources Identification of flash flood hazards Estimation of temporal and spatial river extremes Identification of Risk Pathways Morphological changes and sediment load estimation Flood inundation modeling Vulnerability (Receptors at Risk) Evaluation of socio-economic flood damage Evaluation of risk perception, community behaviour and societal
2006
2007-Extreme Flood events
Vordonia Τι είδε ο Γιαπωνέζος. Vrontamas
2007
Identification of Risk Sources
Περιορισμός της κοίτης με κατασκευές ΤΙ ΕΙ Ε Ο ΓΙΑΠΩΝΕΖΟΣ.
Τι είδε ο Γιαπωνέζος. Σπίτι πάνω σε ρυάκι.
Precipitation analysis. Possibility, P% Recurrence Interval, T Log Pearson III precipitation (mm) Gumbel precipitation (mm) Vrontamas Precipitation, mm 250 200 150 100 50 FREQUENCY CURVE LOG PEARSON III GUMBEL P80 (Τ=1,25y) 27 23 P50 (Τ=2y) 34 36 P10 (Τ=10y) 60 67 P5 (Τ=20y) 75 78 0 1 10 100 1000 Recurrence Interval, years Vrontamas station (1953-2003) P2 (Τ=50y) 98 93 P1 (Τ=100y) 121 105 P0.5 (Τ=200y) 147 116 P0.1 (Τ=500y) 232 131
High temporal variability Βροχομετρικός Σταθμός ΥΠΕΧΩ Ε - Βρονταμά Βροχόπτωση Βρονταμά, mm 350 300 250 200 150 100 50 0 Precipitation analysis. 1993 1995 1997 1999 2001 2003 2005 5 high floods have been happened into 15 years
Πλημμύρες Νοεμβρίου 2005 700 Βροχόπτωση 17-28/11/2005 600 500 400 300 200 100 0 Περιβολίων Βασαρά Έλος Ριβιώτισσα Σελλασία High spatial variability
Flood simulation of 2003, 2005 & 2006
HCMR ANALYSIS
Χαρακτηριστικά Επιμήκη προφίλ - Ενεργού Κλίσης Απόστασης Υψομέτρου Ενέργεια Χειμάρρου (STREAM POWER) STREAM POWER χείμαρρος Σκατιάς 2 (8) Stream power (w/m) 25000 20000 15000 10000 5000 0 0 5000 10000 15000 20000 Απόσταση (m) 21
Ascending of areas for intervention
Proposals Flood Risk Management Pre-flood Measures Technical Measures Regulatory Measures Financial Measures Communication Measures Flood Event Management Early Warning System Emergency Flood Management and Evacuation Planning Post-Flood Measures Relief Measures Repair of Damaged Infrastructure Review of Effectiveness of Flood Protection System
DROUGHTS PREVENTION c. drought Assessment 2006-7 Drought year
%of average precipitaton (1965-2009, 802mm) 1988-1989 56.0 1989-1990 55.4 2006-2007 60.8
2,00 1,50 1,00 0,50 0,00-0,50-1,00-1,50-2,00-2,50-3,00 Standardized Precipitation Index (SPI) Taking in considerations the precipitation heights of the first 3 or 6 months of each hydrologic year we can estimate the Standardized Precipitation Index (SPI). SPI allows us to forecast the incoming drought and to receive suitable measures. Σειρά1 1971-1972 1973-1974 1975-1976 1977-1978 1979-1980 1981-1982 1983-1984 1985-1986 1987-1988 1989-1990 1991-1992 1993-1994 1995-1996 1997-1998 1999-2000 2003-2004 2005-2006 ssss
Effects of 2006/2007 Droughts Surface water Springs Groundwater In August of 2007 the monthly average flow was recorded17% of average annual flow 2000-2008
Affect of Droughts on Vivaris springs 2006-7 Drought year
Water Level in Sentenikou well LRO Koniditsa Σ.Η. Μαϊου γεώτρησης Σεντενίκου Κονιδίτσας 0 Μαϊ-94 Μαϊ-95 Μαϊ-96 Μαϊ-97 Μαϊ-98 Μαϊ-99 Μαϊ-00 Μαϊ-01 Μαϊ-02 Μαϊ-03 Μαϊ-04 Μαϊ-05 Μαϊ-06 Μαϊ-07-2 -4-6 -8-10 -12-14 -16-18 2m Βάθος Στάθμης
Water Level in ΑΜ7Well LRO Amikles Σ.Η. Μαϊου γεώ τρησης ΑΜ7 Αμυκλώ ν Μαϊ-00 Νοε-00 Μαϊ-01 Νοε-01 Μαϊ-02 Νοε-02 Μαϊ-03 Νοε-03 Μαϊ-04 Νοε-04 Μαϊ-05 Νοε-05 Μαϊ-06 0-2 -4-6 -8-10 -12-14 Βάθος Στάθμης Νοε-06 Μαϊ-07 7m -16
Experience for the 1988/90 dry years. In contrast 2005/06 was wet There is experience and guidelines from previous Drought projects, guidelines from Ministry of Agriculture.
Proposals Drought Risk Management Pre-Drought Measures Technical Measures Regulatory Measures Financial Measures Communication Measures Drought Management Post-Drought Measures: Review of Effectiveness of Drought Protection System
COORDINATED ACTIONS FOR FLOOD AND DROUGHTS Construction of Dam in Kelefina Construction of closed reclamation projects in Magoula and Trinassou