Resmi.P, Preethi.T. K and Harikumar P.S , Development of a Water Quality Index appropriate to tropical countries 21 st Kerala Science congress , 2009, Kollam

Harikumar P S, Nasir U P and Madhavan K, Environmental Assessment of Vembanad Lake in the Southwest Coast of India12th International Conference on Integrated Diffuse Pollution Management (IWA DIPCON 2008). Research Center for Environmental and Hazardous Substance Management (EHSM), Khon Kaen University, Thailand ; 25-29 August 2008.

Jisha T S, Prajitha K and Harikumar P S, Water Quality assessment of Kadalundi-Tirur Basin, 18th Swadeshi Science Congress, RGCB, 2008,Thiruvanthapuram

Mujeebu Rahman, Sumesh,K and Harikumar P S, Characterisation of leachate from two municipal solid waste landfill sites of Kerala, Indian Analytical Science Congress 2008,Munnar.

Nasir .U .P and Harikumar .P .S Geochemistry of Core Sediments and Study of Sedimentation Rate of Vembanad Lake Proc. XX Kerala Science Congress, Thiruvananthapuram 2008

Sheena P S, Nasir .U .P, Mujeebu Rahman M P and Harikumar P S, Removal of Lead by Phytoremediation techniques Using Amaranthus Spinosus and Ludergia Peruviana, Indian Analytical Science Congress Nov. 21-22, 2008, Munnar

Harikumar P S and Maheesan P M (2007). Performance of a Constructed Wetland for Domestic Wastewater Treatment, Symposium on Biological Methods of Waste Treatment and Management In South India, February 15th 2007, Chennai.

Nirmala.E, K.N.Remani, P.Jayakumar and M.Beeran(2002). ‘Improvement of the health status of the tribal of the Kerala with special reference to water quality management’, Proc.National conference on modern trends in water resources development and environmental management, Dept. of Civil Engineering, Vellore Institute of Technology, Vellore, 7 - 8 March 2002.

Jalaja.T.K, Nirmala.E, Jayakumar.P and Remani.K.N(2000), Implementation of a Mini Water Supply Scheme through peoples participation. National Symposium on Environmental Crisis and Security in the New Millennium ,Organised by School of Ecology , Pondicherry University, Pondicherry and sponsored by ICMR , CSIR and NESA, New Delhi . 14 -16 December 2000.

Shiny K.J., Nirmala E, Jalaja.T.K, & Remani.K.N. (2000) Improvement of Water Quality Using Cyprinid Fishes Proc. of the 10th World Water Congress, Melbourne.