WG 228'Inf'07 TDA
Total Page:16
File Type:pdf, Size:1020Kb
UNEP(DEC)/MED WG.228/Inf.7 31 July 2003 ENGLISH MEDITERRANEAN ACTION PLAN ASSESSMENT OF TRANSBOUNDARY POLLUTION ISSUES IN THE MEDITERRANEAN SEA UNEP Athens, 2003 Table of Contents MEDITERRANEAN ACTION PLAN ....................................................................................1 1 Introduction.....................................................................................................................1 2 Executive Summary......................................................................................................2 3 The Mediterranean region...........................................................................................6 3.1 Environmental characteristics..................................................................................... 6 3.2 Socio-economic aspects ........................................................................................... 11 3.3 Management and regulatory mechanisms ............................................................... 14 3.4 References ................................................................................................................ 17 4 The nature and sources of transboundary problems and issues..................18 4.1 Airborne deposition ................................................................................................... 18 4.2 Rivers ........................................................................................................................ 38 4.3 Agriculture runoff ....................................................................................................... 63 4.4 Fishery and mariculture............................................................................................. 78 4.5 Urban centres .......................................................................................................... 103 4.6 Industrial activity ...................................................................................................... 120 4.7 Ports and maritime transport................................................................................... 138 4.8 Exploitation of sea bed and subsoil ........................................................................ 160 4.9 References .............................................................................................................. 166 5 Assessment of the impacts of transboundary elements................................179 5.1 Living marine resources .......................................................................................... 179 5.2 Biodiversity and ecosystem changes...................................................................... 188 5.3 Critical habitats ........................................................................................................ 195 5.4 Land use and tourism.............................................................................................. 201 5.5 Human health risks ................................................................................................. 208 5.6 Coastal zone management (CZM) .......................................................................... 221 5.7 References .............................................................................................................. 225 6 Future perspectives of development in the region and potential impacts on the transboundary issues...............................................................................................229 6.1 Demography and urban settlements....................................................................... 229 6.2 Agriculture ............................................................................................................... 234 6.3 Industrial activity ...................................................................................................... 236 6.4 Free Trade............................................................................................................... 240 6.5 References .............................................................................................................. 245 7 Overview of the applicability of burden sharing principles for land-based pollution reduction in the Mediterranean ...................................................................247 7.1 Fairness and equity in multilateral environmental agreements (MEA) .................. 248 7.2 Burden sharing within the Barcelona Convention .................................................. 260 7.3 Conclusions and prospects for future research...................................................... 278 7.4 References .............................................................................................................. 278 8 Conclusions and recommendations....................................................................281 8.1 Gaps of knowledge ................................................................................................. 281 8.2 Reduction of pressures ........................................................................................... 285 8.3 Management and regulatory mechanisms ............................................................. 289 8.4 Identification of needs, in particular for regional co-operation ............................... 290 8.5. Needs and future interventions for CZM................................................................. 291 List of tables Table 1 Major polluted sources................................................................................................2 Table 2 Perceived major problems..........................................................................................3 Table 3 Root causes................................................................................................................4 Table 4 Proposed actions........................................................................................................5 Table 3.1 Major sub-basins of the Mediterranean Sea............................................................7 Table 3.2 Variation of species according to depth zones.......................................................10 Table 3.3 Population density and development in the Mediterranean countries....................11 Table 4.1 Country based emissions of NOx and NH3 in the Mediterranean region.................20 Table 4.2 Sector based emissions of NOx in the Mediterranean region......................................................................................................................................21 Table 4.3 Summary of nitrogen deposition fluxes in the Mediterranean basin.......................................................................................................................................21 Table 4.4 Average deposition fluxes of nitrogen species to Mediterranean sub- regions...................................................................................................................................23 Table 4.5 Nitrogen deposition load to Mediterranean............................................................23 Table 4.6 Deposition of N species to Med sub-regions calculated by modelling...................23 Table 4.7 Comparison of inputs of nitrogen to the Mediterranean Sea sub-bassins through riverine contributions and by atmospheric deposition .............................................25 Table 4.8 Median values of metal concentrations measured in the Mediterranean region and Europe............................................................................................................................26 Table 4.9 1999 Emissions of Pb, Hg, Cd, Cu and Zn in the Mediterranean countries..........28 Table 4.10 Measured and calculated median total, wet and dry deposition fluxes in the Mediterranean region............................................................................................................30 Table 4.11 Deposition fluxes of Cd, Pb and Zn to Mediterranean sub-regions calculated by Modelling..........................................................................................................................31 Table 4.12 Total deposition load of metals to the Mediterranean Sea..................................32 Table 4.13 Atmospheric and riverine inputs of Cd, Cu, Pb and Zn to North-western Mediterranean Sea................................................................................................................32 Table 4.14 Different estimates of POP emissions in the Mediterranean region....................34 Table 4.15 Deposition fluxes of selected POPs in the Mediterranean region........................36 Table 4.16 Deposition loads of select POPs in to the Mediterranean Sea............................36 Table 4.17 Discharge trends since 1960 in some Mediterranean rivers................................39 Table 4.18 Tentative budgets for the natural sediment delivery to the Mediterranean..........42 Table 4.19 The impact of reservoir construction on the sediment fluxes in some Mediterranean rivers...............................................................................................................43 Table 4.20 Average BOD, COD, DOC, POC and TOC values in some Mediterranean rivers ..............................................................................................................44 Table 4.21 Bacteriological water quality in some Mediterranean rivers.................................48 Table 4.22 Relative importance of the different nitrogen and phosphorus species