The Degree of Success in Environmental Mitigation Measures of Development Projects in Sri Lanka with Special Reference to Peraru Water Supply and Sanitation Project


  • Asmi Mohammed Centre for Environmental Studies and Sustainable Development, The Open University of Sri Lanka, Nawala, Nugegoda
  • Tamara K. Weerasinghe Faculty of Natural Sciences, The Open University of Sri Lanka, Nawala, Nugegoda. E-mail:



Human life and element of nature is well connected. Man-made activities can destroy the natural system which sustains the human life. In many parts of the world, economic development projects directed at improving levels of material comfort have had unintended detrimental effects on people and natural resources. Water, land, and air have been degraded to the point where they can no longer sustain existing levels of development and quality of life. Economic development in developing countries has been focused on immediate economic gains environmental protection has not been a priority because the economic losses from environmental degradation often occur long after the economic benefits of development have been realized.

Environmental Management Plans (EMP) are used in development projects to mitigate the anticipated impacts due the project intervention. EMP is monitored periodically using performance indicators shown in the Environmental Monitoring Plan (EMoP). As per National Environmental Act, all the mega development activities must have an   EMP. Some development projects effectively implement the EMP but there are cases that the implementation is not being practiced as per the EMP. This study assessed   how effectively EMP was implemented in Per Aru Water Supply and Sanitation Project. A structured interview guideline was used to collect and obtain information from the target group. The study analysed impact and mitigation on key environmental factors such as air, water, land, fauna and flora.

Throughout the study, it was found that the implementation of EMP was successful. Project had planted around 176,972 plants for removing 1600 trees; Followed enough mitigation measures riprap and turfing to control the erosion in the bund; less mobile species were translocated to similar habitat area; no degradation occurred to the water body surrounding the project area; however project had failed to take enough mitigation measures on dust, translocating the flora and releasing the environmental flow. It is recommended to release the environmental flow, form a grievance redress mechanism to solve environmental related peoples’ complains and grievances, improve the community consultation, increase the project approving agencies monitoring on the implementation of EMP, and control the invasive plants Muntingia calabura (Jam fruit tree). Further, recommended to donor agencies to evaluate the successfulness of the implemented EMP after project completion


(1) Asian Development Bank (ADB), (2018a). TA-9050 REG: Strengthening Capacities to Design and Implement Smart Urban Infrastructure - The Small Towns and Rural Arid Areas Water Supply and Sanitation Project, Final Report.

(2) Asian Development Bank (ADB), (2018b). Impacts of Dams on Fish in the Rivers of Nepal, 44-46pp.

(3) Dharmasena, P.B., (2003). Soil erosion and conservation – A case study in the dry zone of Sri Lanka. Tropical Agricultural Research and Extension, 6, 2003. p 128-131.

(4) Diana, V. (2018). Daily Financial Times, Moragahakanda Mega Irrigation Project to boost rice production,

(Accessed 29 April 2019)

(5) Donnelly, A., Dalal-Clayton, B. and Hughes, R. (1998), A Directory of Impact Assessment Guidelines, London, International Institute for Environment and Development, 2nd edition

(6) Environmental Impact Assessment (EIA), (2012a). Environmental Impact Assessment on the Proposed Surface Water Extraction from a Reservoir Across Per Aru, Vavuniya District. May 2012

(7) Environmental Impact Assessment (EIA), (2012b). Environmental Impact Assessment on the Proposed Surface Water Extraction from a Reservoir Across Per Aru, Vavuniya District. November 2012.

(8) Environmental Monitoring Reports (EMoR), (2015-2016), Semi Annual Environmental Monitoring Reports.

(9) Gopal, B. (2013). Environmental flows: An introduction for water resource managers. National Institute of Ecology, New Delhi.

(10) IUCN, (2007). Biodiversity assessment of the Moragahakanda agriculture development project. Support to implement EIA recommendations of the Moragahakanda Agricultural Development Project (MADP) and Kalu Ganga Reservoir and Agricultural Extension Project (KR&AEP)

(11) King. J.M., Tharme, R.E. and Villiers, M.S. (2008). Environmental Flow Assessment for Rivers: Manual for the Building Block Methodology. Water Research Commision, Republic of South Africa.

(12) Kupolati. W.K., (2010). Environmental Impact Assessment of Civil Engineering Infrastructure Development Projects. OIDA International Journal of Sustainable Development 02:04 (2010) 57-66, Available at

(13) Lawrence. S.F, (2011). Guidelines for Community Noise Impact Assessment and Mitigation. I-INCE Publication Number: 11-1

(14) Lee, N. (2000). ‘Integrating appraisals and decision making’, in N. Lee and C. George (eds.) Environmental Assessment in Developing and Transitional Countries, Chichester, John Wiley and Sons

(15) Lohani, B., Evans.J,W., Ludwig.H., Everitt.R.R., Richard A. Carpenter, and Tu.S.L., (1997). Environmental Impact Assessment for Developing Countries in Asia.Volume 1 – Overview, 1-13 pp.

(16) Richter, B.D., Baumgartner, J.V.B., Wigington, R. and Braun, D.P. (1997). How much water does a river need?. Fresh water Biology.

(17) Subhendu, G., Sumanta, B. and Chumki, M., (2018). Impact of Maithon Dam – A Micro Level Study on Salanpur Block of Paschim Bardhaman District, West Bengal, International Journal of Computational Engineering Research (IJCER), Volume 08

(18) Wasantha, S.W., (2018). The Island newspaper article, Fish Ladders to preserve Sri Lankan Culture. Available from: (Accessed 16 Feb 2019)

(19) Wickramasinghe, L.A. and Premalal. R, (1988) Development of a rainstorm erosivity map for Sri Lanka. Proc. of the 5th International Soil Conservation Conference. (Ed.) Sanam Rimwanich. Bangkok, Thailand

(20) Wilbanks, T. J., Hunsaker, D. B., Jr., Petric, C. H., and Wright, S. B. (1993). ‘Potential to transfer the US NEPA experience in developing countries’, in S. G. Hildebrand and J B Cannon (eds.) Environmental Analysis: the NEPA Experience, Lewis, Boca Raton, FL.

(21) Wood, C. (2003). Environmental Impact Assessment in Developing Countries: An Overview, EIA Centre, School of Planning and Landscape, University of Manchester, Manchester M13 9PL.




How to Cite

Mohammed, A., & Weerasinghe , T. K. (2021). The Degree of Success in Environmental Mitigation Measures of Development Projects in Sri Lanka with Special Reference to Peraru Water Supply and Sanitation Project. European Journal of Applied Sciences, 9(1), 174–194.