, Volume 57, Issue 3, pp 159–168

Water resource impacts of climate change in southwestern Bulgaria

  • Heejun Chang
  • C. Gregory Knight
  • Marieta P. Staneva
  • Deyan Kostov


This study assesses the regional impact of climate change on runoff in a mountainous region of southwestern Bulgaria. A GIS-based distributed hydrologic model and two climate change scenarios – HadCM2 and CCC – were employed for years around 2025 and 2085. Results from both scenarios demonstrate the basin's sensitivity of runoff to climate change, which produce significant spatial and temporal changes in the basin's water yield with maximum runoff shift into early spring and further decreases in summer runoff. There could be no reduction in mean annual runoff, except under the Hadley scenario by 2085. Changes in the magnitude of mean monthly and peak flow are associated with early snowmelt and a reduction in snow cover in spring. Increases in spatial variability of runoff reflect the basin's complex physiographic characteristics. The increase of spatial and temporal variability in runoff points to different strategies for future water resource management.

Bulgaria climate change runoff spatial and temporal variability GIS 


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  1. Alexandrov V.A., 1997: Vulnerable agronomic systems in Bulgaria.Climatic Change 36(1/2): 135–149.CrossRefGoogle Scholar
  2. Arnell N.W. 1992: Factors Controlling the Effects of Climate Change on River Flow Regimes in a Humid Temperate Environment.Journal of Hydrology 132: 321–342.CrossRefGoogle Scholar
  3. Arnell N.W., 1996:Global warming, River Flows, and Water Resources.Wiley, New York.Google Scholar
  4. Arnell N.W., 1998: Climate Change and Water Resources in Britain.Climatic Change 39: 83–110.CrossRefGoogle Scholar
  5. Arnell N.W., 1999: The effect of climate change on hydrological regimes in Europe: A continental perspective.Global Environmental Change 9: 5–23.CrossRefGoogle Scholar
  6. Avila A., Neal C., Terradas J. 1996: Climate change implications for streamflow and streamwater chemistry in a Mediterranean catchment.Journal of Hydrology 177: 99–116.CrossRefGoogle Scholar
  7. Bergström S., 1998: Requirements on Climate Scenarios for Water Resources Impact Studies-A Nordic Perspective, inProceedings of the Second International Conference on Climate and Water, August 1998, Espoo, Finland, pp. 114–123.Google Scholar
  8. Bergström S. and Lindström G., 1998: A Swedish Perspective on Climate Change and Flood Risks, inSecond International RIBAMOD Workshop on Impact of Climate Change on Flooding and Sustainable River Management, IH Wallingford, 26-27 FebruarGoogle Scholar
  9. Bergström S., Carlsson, B., Gardelin, M., Lindstrom, G., Pettersson, A., and Rummukainen, M., 2001: Climate change impacts on runoff in Sweden-Assessments by global climate models, dynamical downscaling and hydrological modelling.Climate Research 16(2): 101–112.Google Scholar
  10. Bultot F., Gellens D., Schadler B. and Spreafico M., 1994: Effects of Climate Change on Snow Accumulation and Melting in the Broye Catchment (Switzerland).Climatic Change 28: 339–363.CrossRefGoogle Scholar
  11. Chang, H., Evans, B.M. and Easterling, D.R., 2001: The Effects of Climate Change on Stream Flow and Nutrient Loading.Journal of American Water Resources Association 37(4): 863–985.CrossRefGoogle Scholar
  12. Cohen S.J., 1995: An interdisciplinary assessment of climate change on northern ecosystems: the Mackenzie Basin Impact Study. In: Peterson D.L. and Johnson D.R. (eds),Human ecology and climate change: People and resources in the Far North. Taylor and Francis, Washington D.C. pp. 301–316.Google Scholar
  13. Doherty E.R., Mearns L.O., 1999:A comparison of simulations of current climate from two coupled atmosphere-ocean global climate models against observations and evaluation of their future climates. Report to the National Institute for Global Environmental Change (NIGEC), National Center for Atmospheric Research, Boulder, CO.Google Scholar
  14. Eastman J.R., 1997: IDRISI for Windows Version 2.0. Clark Labs for Cartographic Technology and Geographic Analysis, Clark University, Worcester, Massachusetts, (c) 1987–1997.Google Scholar
  15. Europe's Environment, 1995:Statistical Compendium for the Dobris Assessment.Office for Official Publications of the European Community for Eurostat, the European Environment Agency Task Force, DG XI and PHARE European Commission, UN Economic Commission for Europe, Organization for Economic Cooperation and Development, and World Health Organization, Luxembourg 1995.Google Scholar
  16. Field C.B., Jackson R.B. and Mooney H.A., 1995: Stomatal responses to increased CO2: Implications from the plant to the global scale.Plant Cell Environment 18: 1214–1225.CrossRefGoogle Scholar
  17. Flato G.M., Boer G.J., Lee W.G., McFarlane N.A., Ramsden D., Reader M.C. and Weaver A.J., 2000: The Canadian Centre for Climate Modelling and Analysis Global Coupled Model and its Climate.Climate Dynamics 16: 451–467.CrossRefGoogle Scholar
  18. Gellens D. and Roulin F., 1998: Streamflow Response of Belgian Catchments to IPCC Climate Change Scenarios.Journal of Hydrology 210: 242–258.CrossRefGoogle Scholar
  19. Gerasimov S., Nikolova, N., and Davidov, D. 2000: Water Resources and Hazards. In Staneva, M.P., C.G. Knight, T.N. Hristov, D. Mishev (eds).Global Change and Bulgaria. pp. 199–227. National Coordination Center for Global Change, Bulgairan Academy of Sciences, Sofia, Bulgaria.Google Scholar
  20. Gleick P.H., 1987a: The Development and Testing of a Water Balance Model for Climate Impact Assessment: The Sacramento Basin.Water Resources Research 23: 1049–1061.CrossRefGoogle Scholar
  21. Gleick P.H., 1987b: Regional hydrologic consequences of increases in atmospheric CO2 and other trace gases.Climatic Change 10: 137–161.CrossRefGoogle Scholar
  22. The IPCC Data Distribution Center, 2000: Downloading Scenarios and Climate Data from the DDC cru-data/datadownload/download-index.html accessed on April 20, 2000.Google Scholar
  23. Ivanov N.N. 1957:Mirovaya karta isparyaemosti (World map of evaporation). Leningrad: Gidropmeteoizdat (in Russian).Google Scholar
  24. Jones J.A.A., Liu C.M., Woo M.-K. and Kung H.-T. (eds), 1996:Regional Hydrological Response to Climate Change. Kluwer, Dordrecht, The Netherlands.Google Scholar
  25. Jones J.A.A., 1999: Climate change and sustainable water resources: Placing the threat of global warming in perspective.Hydrological Sciences Journal 44(4): 541–557.Google Scholar
  26. Kwadijk J. and Rotmans J., 1995: The impact of climate change on the River Rhine: A scenario study.Climatic Change 30: 397–425.CrossRefGoogle Scholar
  27. Knight C.G., Chang H., Staneva S. and Kostov D., 2001: A Simplified Basin Model for Simulating Runoff: The Struma River GIS,The Professional Geographer 53(4): 533–545.CrossRefGoogle Scholar
  28. Knight C.G. and Staneva M.P., 1996: The water resources of Bulgaria: An overview.GeoJournal 40(4): 347–362.Google Scholar
  29. Knight C.G., Velev S.B. and Staneva M.P., 1995: The Emerging Water Crisis in Bulgaria: An overview.GeoJournal,35(4): 415–423.CrossRefGoogle Scholar
  30. Leavesley G.H., 1994: Modelling the Effects of Climate Change on Water Resources-A Review.Climatic Change 28: 159–177.CrossRefGoogle Scholar
  31. Legates D.R.1988 A Climatology of Global Precipitation.Publications in Climatology401.University of DelawareGoogle Scholar
  32. Limbrick K.J., Whitehead P.G., Butterfield D. and Reynard N., 2000: Assessing the potential impacts of various climate change scenarios on the hydrological regime of the River Kennet at Theale, Berkshire, south-central England, UK: An application and evaluation of the new semi-distributed model, INCA.The Science of the Total Environment,251/252: 539–555.CrossRefGoogle Scholar
  33. Loukas A. and Quick M.C., 1999: The effect of climate change on floods in British Columbia.Nordic Hydrology 30: 231–256.Google Scholar
  34. Mansell M.G., 1997: The effect of Climate Change on Rainfall Trends and Flooding Risk in the West of Scotland.Nordic Hydrology 28: 37–50.Google Scholar
  35. Mather J.R., 1997: Water budget climatology. In: Hanson S. (ed.),10 Geographic Ideas that Changed the World, pp. 108–124. Rutgers University Press, New Brunswick, NJ.Google Scholar
  36. May W., Shea D.J. and Madden R.A., 1992:The Annual Variation of Surface Temperatures over the World. NCAR Technical Note NCAR/TN-372+STR, Boulder, Colorado, 134 pp.Google Scholar
  37. McCabe Jr. G.J. and Wolock D.M., 1992: Effects of climate change and climate variability on the Thornthwaite moisture index in the Delaware River basin.Climatic Change 20: 143–153.CrossRefGoogle Scholar
  38. McCabe Jr. G.J. and Hay L.E., 1995: Hydrological effects of hypothetical climate change in the East River basin, Colorado, USA.Hydrological Sciences Journal 40(3): 303–318.Google Scholar
  39. Middelkoop H., Daamen K., Gellens D., Grabs W., Kwadijk J.C.J., Land H., Parmet B.W.A.H., Schadler B., Schulla J. and Wilke K., 2001: Impact of climate change on hydrological regimes and water resources management in the Rhine Basin.Climatic Change 49(1–2): 105–128.CrossRefGoogle Scholar
  40. Mimikou M.A., Kanellopoulou S.P. and Baltas E.A., 1999: Human implication of changes in the hydrological regime due to climate change in Northern Greece.Global Environmental Change 9: 139–156.CrossRefGoogle Scholar
  41. Mimikou M.A., Baltas E., Varanou E. and Pantazis K., 2000: Regional impacts of climate change on water resources quantity and quality indicators.Journal of Hydrology 234: 95–109.CrossRefGoogle Scholar
  42. Neff R., Chang H., Knight C.G., Najjar R., Yarnal B. and Walker H., 2000: Impact of Climate Variation and Change on Mid-Atlantic Region Hydrology and Water Resources.Climate Research 14: 207–218.Google Scholar
  43. Panagoulia D., 1992: Impacts of GISS-modelled Climate Changes on Catchment Hydrology.Hydrological Science Journal 37: 141–163.CrossRefGoogle Scholar
  44. Schmel D., 1996: Radiative Forcing of Climate Change,Climate Change 1995: The Science of Climate Change. Cambridge University Press, Cambridge.Google Scholar
  45. Schreider S.Y., Jakeman A.J., Pittock A.B. and Whetton P.H., 1996: Estimation of possible climate change impacts on water availability, extreme flow events and soil moisture in the Goulburn and Ovens basins, Victoria.Climatic Change 34: 513–546.CrossRefGoogle Scholar
  46. SemÁdeni-Davies A.F., 1997: Monthly snowmelt modelling for largescale climate change studies using the degree day approach.Ecological Modelling 101: 303–323.CrossRefGoogle Scholar
  47. Thornthwaite G.W. and Mather J.R., 1955:The Water Balance. 8, Laboratory of Climatology, Centerton, NJ.Google Scholar
  48. Thornthwaite G.W. and Mather J.R., 1955:The Water Balance. Laboratory of Climatology, Centerton, NJ.Google Scholar
  49. U.S. National Assessment Synthesis Team, 2000}:Climate Change Impacts on the United States: The Potential Consequences of Climate Variability and Change. US Global Change Research Program. Cambridge University Press.Google Scholar
  50. U.S. Soil Conservation Service, 1986:Urban Hydrology for Small Watersheds. Technical Release No. 55. U.S. Soil Conservation Service, Washington, DC.Google Scholar
  51. Watson R.T., Zinyowera M., Moss R.H. and Dokken D.J. (eds), 1996:Climate Change 1995: Impacts, Adaptations and Mitigation of Climate Change, Scientific Technical Analyses, Contribution of Working Group II to the Second Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, New York.Google Scholar
  52. Wigley T.M.L. and Jones P.D., 1985: Influences of precipitation changes and direct CO2 effects on streamflow.Nature 314: 149–152.CrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Heejun Chang
    • 1
  • C. Gregory Knight
    • 2
  • Marieta P. Staneva
    • 3
    • 4
  • Deyan Kostov
    • 5
  1. 1.Department of GeographyPortland State UniversityPortlandUSA
  2. 2.Department of GeographyPennsylvania State UniversityUSA
  3. 3.Pennsylvania State University (Altoona Campus)AltoonaUSA
  4. 4.Center for Integrated Regional AssessmentPennsylvania State UniversityUSA
  5. 5.Independent ScholarStara ZagoraBulgaria

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