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what’s the problem with danube delta? liviu giosan what’s important - largest wetland in Europe - 2nd largest compact reedbed in the World -species: ~300 birds; ~90 fish Established as Biosphere Reserve in 1998 – shared by Romania (~80%) and Ukraine Populated since Neolithic Exploited by Greeks, Romans, Byzantines, Ottomans Black Sea what’s important NIDD, 2005 the delta - evolution Giosan et al., 2006 the delta - morphology Giosan et al., 2005 global influences sea level climate sea level (subsidence) Giosan et al., 2006 van der Hoeven et al., 2006 Cazenave et al., 2002 climate - river Giosan et al., in prep. climate - basin Vespremeanu-Stroe et al., 2007 regional influences upstream: discharge deforestation dam irrigation pollution basin: morphodynamics salinization the river the river – water and sediment discharge Water and Suspended Sediment Discharge 1945-2005, CEATAL IZMAIL 10000 3500 9000 3000 R (kg/s) 8000 7000 2500 Q (m3/s) 6000 2000 5000 4000 1500 3000 1000 2000 500 1000 0 0 1993 1987 1975 1978 1981 1966 2002 2005 1996 1990 1984 1969 1972 1963 1951 1954 1945 1999 1957 1960 1948 the river – dams the basin – ecosystems Humborg al., 1997 the basin – waves, currents sediment transport Giosan et al., 2005 the basin – shelf morphodynamics Giosan, Constantinescu et al., in prep. the basin – river mouth morphodynamics Giosan et al., 2005 the basin – river mouth morphodynamics the basin – coast morphodynamics Time 1 Time 2 Time 3 Ashton and Giosan, in prep. the basin – coast morphodynamics 2003 Giosan et al., in 2005 local human perspective: urbanization agriculture-fishing tourism transport population property issues hazards: inundation erosion shoaling (sediment routing across delta) the delta – water and sediment routing Chilia St. George Sulina Bondar, 2003 the delta – fishing NIDD, 2005 the delta – water and sediment routing NIDD, 2005 the delta – transport the problems DD evolved in stable sea level regime – now sea level rise accelerated DD evolved in stable? sediment regime – now sediment less than half DD evolved in a natural coastal regime – now engineered DD escaped heavy development – now at the horizon indus delta: what do we know? liviu giosan climate Bookhagen et al., 2006 evolution (climate, sea level, subsidence) Giosan et al., in prep. largest irrigation system Inam et al., in press salinization, desertification the shelf Giosan et al., 2006 the coast 1 11 21 31 41 51 61 71 81 91 101 111 121 131 141 151 161 200 150 Advance 100 50 1855-1954 0 1978-2000 -50 -100 -150 Retreat 1 Shoreline Change Rate (m/year) -200 Profile Number 36 115 145 Giosan et al., 2006 Thank You ! .

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