Rainfall variability in the wet-dry seasons. An analysis in Batticaloa District, Sri Lanka

• Autorzy: Mathanraj A.S. , Kaleel M.I.M.
• Języki publikacji: EN

Abstrakty

EN

Rainfall is of primary importance to both the physical and cultural landscape of any region. The objective of this study is to find the trends for rainfall variability on climate change in Batticaloa District of Sri Lanka, by analyzing 146 years of monthly data of rainfall received during the period 1869-2014 from the meteorological station of the Department of Meteorology. Some studies attribute extreme events to rainfall variability due to climate change induced by global warming. However, there is a dearth of climatological studies addressing the trends in rainfall over Sri Lanka in support of such attribution. In our study, statistical analysis such as linear and standard deviation for 3 year, 5 year, 11 year and 21 year periods were utilized to examine periodic rainfall changes in both annual and seasonal contexts. The study finds that the 3, 5 year moving average shows high drier seasons, but the 11, 21 years moving average show higher wet seasons during the period of study. The changes of rainfall are known to have led to disasters such as flood and drought. Annual rainfall varies from 864 mm to 3081 mm, the distribution of which has sight variation throughout the district.

• Wydawca: -
• Czasopismo: World News of Natural Sciences
• Rocznik: 2017
• Tom: 09
• Opis fizyczny: p.71-78,fig.,ref.

Twórcy

autor

Mathanraj A.S.

• Department of Geography, South Eastern University of Sri Lanka, Oluvil, Sri Lanka

autor

Kaleel M.I.M.

Bibliografia

• [1] L Chandrapala. Long term trends of Rainfall and Temperature in Sri Lanka, Co. Ltd, Ceylon, 1966.
• [2] Harzallah, J. O. Rocha de Aragao & R. Sadourny. Inter annual Rainfall Variability in North-East Brazil: Observation and Model Simulation. International Journal of Climatology, 16 (1996) 861-878.
• [3] R. A. Mendelsohn, Dinar, & A. Sanghi. The effect of development on the climate sensitivity of agriculture. Environment and Development Economics 6 (2001) 85-101.
• [4] M. Munasinghe. Sustainable development and climate change: applying the sustainomics transdisciplinarymeta-framework. International Journal of Global Environmental Issues 1 (2001) 13-55.
• [5] Yoshino, Masatoshi M., Suppiah, Ramasamy (1984). Rainfall and Paddy Production in Sri Lanka, pages 9-20.
• [6] S. Mathanraj, M. I. M. Kaleel, The Influence of Rainfall Variability on Paddy Production: A Case Study in Batticalloa District. World Scientific News 52 (2016) 265-275
• [7] M. B. Muneera, M. I. M. Kaleel, Emerging challenges of urbanization: a case study of Kalmunai municipal area in Ampara district. World Scientific News 59 (2016) 35-51
• [8] M. I. M. Kaleel, Pipe-borne water consumption and its wastage: A study based on Panandura Urban Area in Sri Lanka. World Scientific News 66 (2017) 250-262
• [9] Paul Laris, Moussa Koné, Sepideh Dadashi, Fadiala Dembele, The early/late fire dichotomy, Progress in Physical Geography, 2017, 41, 1, 68
• [10] Annegret Larsen, Jan-Hendrik May, Patrick Moss, Jorg Hacker, Could alluvial knickpoint retreat rather than fire drive the loss of alluvial wet monsoon forest, tropical northern Australia?, Earth Surface Processes and Landforms, 2016, 41, 11, 1583
• [11] Madeleine Nobbs, Sean J. Blamires, Making up for lost time: Biophysical constraints on the temporal abundance of two fiddler crabs in wet-dry tropical mangroves, Austral Ecology, 2016, 41, 7, 791
• [12] Emma Asbridge, Richard M. Lucas, Mangrove Response to Environmental Change in Kakadu National Park, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2016, 9, 12, 5612
• [13] CJ Davis, EG Hanna, Temperature and rainfall trends in northern Australia 1911-2013: implications for human activity and regional development, Climate Research, 2016, 71, 1, 1