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Journal of Mountain Science

, Volume 2, Issue 3, pp 218–224 | Cite as

Changing rainfall and its impact on landslides in Sri Lanka

  • Uditha Ratnayake
  • Srikantha Herath
Article

Abstract

During the recent past the rainfall pattern in Sri Lanka has shown a noticeable change. This paper describes the effect of this change on the occurrence of landslides and their impacts to eco systems. This study shows that most of the landslides occurring in Sri Lanka during northeast monsoons, southwest monsoons and second inter-monsoon were located in three distinctively separated areas. Analysis of rainfall time series shows a trend of increased lengths of dry periods along with an increasing trend of rainfall intensity, especially after the late seventies. A strong relation is obtained between the location of landslides and the spatial distribution of areas where rainfall intensity is increased.

Keywords

Rainfall landslides Sri Lanka 

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References

  1. Amaratunnga G.K. 1994. Negative Impact of Landslides on Environment.Proceedings, National Symposium on Landslide in Sri Lanka Volume 01, National Building Research Organization, Colombo, Sri Lanka, Pp. 207–210.Google Scholar
  2. Brunetti, M., Buffoni, L., Mauger, M., Nanni, T. 2001a. Precipitation Intensity Trends in Northern Italy.International Journal of Climatology 20: 1017–1031.CrossRefGoogle Scholar
  3. Brunetti, M., Mauger, M., Nanni, T. 2001b. Changes in Total Precipitation, Rainy Days and Extreme Events in Northeastern Italy.International Journal of Climatology 21: 861–871.CrossRefGoogle Scholar
  4. Dissanayake A.K. 1998. A Study of Geotechnical Aspects of some Sri Lankan Landslides. A Master of Philosophy Thesis, Department of Civil Engineering, University of Peradeniya, Peradeniya, Sri Lanka.Google Scholar
  5. Domroes, M., Ranatunga, E. 1993. Analysis of Inter-station Daily Rainfall Correlation During the Southwest Monsoon in the Wet Zone of Sri Lanka.Geografiska Annaler 75A (3): 137–148.CrossRefGoogle Scholar
  6. Groisman, P.Y., Karl, T.R., Easterling, D.R., Knight, R.W., Jamason, P.F., Hennessy, K.J., Suppiah, R., Page, C., Wibig, M., Fortuniak, J., Razivaev, K., Douglass, V.N., Forland, A., Zhai, E.J. 1999. Changes in the Probability of Heavy Precipitation: Important Indicators of Climatic Change.Climate Change 42: 243–283.CrossRefGoogle Scholar
  7. Herath S. and Ratnayake, U.R. 2004. Monitoring Rainfall Trends to Predict Adverse Impacts—a Case Study from Sri Lanka (1964–1993).Global Environmental Change 14: 71–79.CrossRefGoogle Scholar
  8. Houghton, J.T., Meira Filho, L.G., Callander, B.A., Harris, N., Kattenberg, A., Maskell, K. (eds.). 1996. IPCC Climate Change.The IPCC Second Assessment Report. Cambridge University Press, New York.Google Scholar
  9. Kotapola J. 1994. Landslides in Sri Lanka in the 21st Century.Proceedings, National Symposium on Landslide in Sri Lanka Volume 01. National Building Research Organization, Colombo, Sri Lanka, Pp. 161–168.Google Scholar
  10. Manton, M.J., Della Marta, P.M., Haylock, M.R., Hennessy, K.J., Nicholls, N., Chambers, L.E., Collins, D.A., Daw, G., Finet, A., Gunawan, D., Inape, K., Isobe, H., Kestin, T.S., Lefale, P., Leyu, C.H., Lwin, T., Maitrepierre, L., Ourprasitwong, N., Page, C.M., Pahalad, J., Plummer, N., Salinger, M.J., Suppiah, R., Tran, V.L., Trewin, B., Tibig, I., Yee, D. 2001. Trends in Extreme Daily Rainfall and Temperature in Southeast Asia and the South Pacic: 1961–1998.International Journal of Climatalogy 21: 269–284.CrossRefGoogle Scholar
  11. Ministry of Forestry and Environment of Sri Lanka. 2001.National State of the Environment (SoE) of Sri Lanka in 2001. UNEP report, Colombo, Sri Lanka.Google Scholar

Copyright information

© Institute of Moutain Hazards and Environment, Chinese Academy of Sciences and Science Press 2005

Authors and Affiliations

  • Uditha Ratnayake
    • 1
  • Srikantha Herath
    • 2
  1. 1.Department of Civil EngineeringUniversity of PeradeniyaPeradeniyaSri Lanka
  2. 2.Environment and Sustainable Development ProgramUnited Nations UniversityTokyoJapan

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