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120511 iasi   danube - Mr Orhan Ibram
 

120511 iasi danube - Mr Orhan Ibram

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River restoration project in the Danuabe Delta

River restoration project in the Danuabe Delta

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    120511 iasi   danube - Mr Orhan Ibram 120511 iasi danube - Mr Orhan Ibram Presentation Transcript

    • Wetland restoration projects in the Danube Delta Biosphere Reserve/RomaniaRiver Restoration Seminar – Iasi, May 2012 1
    • HUMAN INDUCED CHANGES IN DANUBE DELTA Nitrogen: 300,000-400,000 t/year Phosphorous: 45,000-60,000 t/year Oil: 45,000-50,000 t/year DANUBE TULCEA HABITAT HABITAT REDUCTIONS ALTERATIONS A BY BY Black Sea DAMMING POLLUTION UPSTREAM FLOODPLAIN AND AND 22% OF THE DELTA DREDGING CHANNELS LEGEND AND Damming (22%) BUILDING BARRAGES Pollution AT KM 942 AND KM 863 New channels FROM RIVER MOUTHS 2SEE HydroPower - Seminar addressed to stakeholders of hydropower target groups in Romania, 18-19 May, Tulcea/Romania
    • DAMMING FLOODPLAIN UPSTREAM DELTA Catch sizes in the Romanian Danube Delta and Damming floodplain area of the adjacent lakes Danube river 18000 x1,000 ha 16000 500 14000 12000 400 tons 10000 Cyprinus Carpio 8000 Total 300 6000 4000 200 2000 0 1948 1954 1956 1960 1961 1964 1968 1974 1950 1952 1958 1966 1970 1972 100 0 1949 1952 1956 1960 1962 1966 1975 Siret Damming period Calmatui <1960 Iron Gate I 1960-1965 Ialomita 1965-1970 Jiu >1970 Iron Gate II Arges Olt 3
    • DAMMING AND CHANNEL EXCAVATIONDan ub e Dan ub e Legend Legend Excavation period 1880-1902 Bu ilding period 1903-1916 1930-1940 1960-1970 1941-1951 1971-1980 1952-1960 > 1960 1981-1989 4
    • Channelsblocking 5
    • CHANGES OF HYDROLOGY AND WATER CHEMISTRYDANUBE RIVER DELTA ECOSYSTEMS Before 1960 1971-1980 1980-1989 2003-2005Water inflow (cm/s) 309 359 620 700 P(PO4) (mg/l) <0,01 0,06 0,07 0,05 N(NO3) (mg/l) 0,4 1,5 1,5 0,6 P(PO4) inflow 1400 1100 tons/year 100 700 N(NO3) inflow 13500 tons/year 4000 17000 29300 7SEE HydroPower - Seminar addressed to stakeholders of hydropower target groups in Romania, 18-19 May, Tulcea/Romania
    • Restoration Works in the Danube Delta In 1994 - Babina (2,100 ha), - agricultural polder - in 1996 - Cernovca(1,580 ha) - agricultural polder - in 2000 - Popina(3,600 ha) - fishpond - in 2002 - Fortuna (2,115 ha) - - agricultural polder - in 2006 - SF. Gheorghe arm’s meanders (687 ha) In 2008 - Holbina - Dunavat(5,630 ha) - fishponds - TOTAL: 15,712 8
    • BABINA-CERNOVCA PILOT PROJECT Babina Cernovca (2,100 ha) (1,580 ha)Research 1991 - 1994 1991 - 1996Design 1994 1996Implementation 1994 1996Monitoring 1995 - 2003 1997 - 2003 fully fully implemented implementedProject status reverted to reverted to wetland wetland since 1994 since 1996 a mosaic of water types, clear to turbid waterPresent status systems, depending on the connectivity to the river 9
    • A management master plan that have been elaborated ina first phase for DDBRcomprised a number of areas tobe restored. Preparative studies were conducted from1991 10
    • BEFORE FLOODING 11
    • 2 YEARS AFTER FLOODING 12
    • AGRICULTURAL POLDER IN DANUBE DELTA 13
    • Babina-Cernovca area (satellite images) 1993 1993 1996 1996 14
    • BIOLOGICAL FILTERING CAPACITY OF THE PALUSTRIAN AND AQUATIC VEGETATIONStudies based on the model proposed by ConstantinescuAnd Bakkum (2001)-on proccesses occuring in reed covered areasIncluding nitrate and phosphorus cycles (model DANUBS_WQ)334kg/ha/year mineral nitrogen and 14.5 kg/ha/year totalphosphorus 15
    • CONTACT OF CLEAN WATER FROM RESTORED AREA WITH DANUBE WATER RICH IN SEDIMENTS Positive effect – reduced eutrophication 16
    • CONTROL FISHING RESULTS IN RESTORED AREAS INDICATES THE PRESENCE OF BOTH REPRODUCERS AND YOUNG FISHESFish diversity (more than 29 sp.)Reproduction areasFeeding and raising ground for juvenile and adult fishRefuge areas 17
    • POPINA PROJECT• S = 3,600 ha, fish ponds -Research: 1996-1999 -Implemented since 2000 -Status: permanentwetland connected to the river I NA PI PO CHIL d oa iR be IA Arm m Dâ ok Bro O p e n in g 860641 433283 EC 21 Po p ina M onk Po p in a Ca EC 22 na l h nc Bra ura M us Cardon Canal Canalul Cardon 18
    • FORTUNA PROJECT• S = 2,115 ha -Former polder for forestry -Research: 2000-2002 -Present status: implementated 2002 Fortuna Lake Danube 19
    • HOLBINA-DUNAVAT PROJECTS = 5,630 ha, former fish farmsResearch: 1993-1996Result: Restoration strategyImplementation status: Implemented 2010Evolution: water systemreverted from turbid plankton- dominated state to clearmacrophytes - dominated one (!) 20
    • Hydrological connectivity restorationMEANDERS PROJECT S= 687 ha 3 islands - created as a result of rectification ofDanube arm - were proposed to be connected to river 21
    • BENEFITS OF ECOLOGICAL RESTORATIONBABINA&CERNOVCA PILOT PROJECTS - S=3,600HA UNSUSTAINABLE / ABANDONED POLDERS WETLAND REHABILITATION FILTERING ECOLOGICAL VALUESECONOMICAL RESULTS NUTRIENT REMOVAL FISH: 34 KG/HA/YEAR - 15 KG PHOSPHORUS/HA/YEAR REED: 1-2 TONES/HA/YEAR - 335 KG NITROGEN/HA/YEAR PASTURE: 0,5 UVM/HA/YEAR SEDIMENT RETENTION - 11 TONES/HA/YEAR 50-100 EURO/HA/YEAR with low costs instead subsidies HABITAT FOR BIRDS AND FISHES AESTHETIC VALUES WATER STORAGE 22
    • ECONOMICAL INDICATOR: MAXIMUM COST/BENEFIT RATIO BABINA&CERNOVCA PILOT PROJECTS - S=3,600HA COSTS: COSTS RESEARCH, DESIGN & IMPLEMENTATION: 100,000 EURO BENEFITS: FISH YIELD: 3,600HA x 34KG x 0.5EURO/KG = 60,000EURO/YEAR REED HARVEST: 3,600HA x 1T/HA x 16EURO/T = 60,000EURO/YEAR TOURISM: 10TURISTS x 100DAYS/YEAR x 10EURO/DAY = 10,000EURO/YEAR CATTLE: 100HA x 0.5UVM/HA x 100KG x 2EURO/KG = 10,000EURO/YEAR TOTAL VALUE : 140,000 EURO/YEAR at low labour costs 23
    • SUCCESSES &DANUBEDELTABIOSPHERERESERVEAUTHORITY 24
    • CONSTRAINTS ECONOMIC INTEREST POLITICAL DECISION PUBLIC AWARENESS STAKEHOLDERS LEGISLATIVE FRAMEWORK PARTICIPATIONWATER FUN CTIONAL WETLAND RESTORATION INTEGRITYQUALITY IRREVERSIBLE GAPS IN KNOWLEDGE MAN MADE CHANGES (after Staras, 2000) 25
    • (after Staras, 2000) 26
    • THANK YOU 27
    • Orhan IbramHydrobiology Lab.Danube Delta National Institutefor Research and Development165 Babadag street820112 Tulcea / ROMANIAPhone 0040 240 524546Fax 0040 240 533547Contact: orhan@indd.tim.ro 28