K.N.Remani, T.K.Jalaja and Jayakumar P (2010)“Impact of Coir Retting on the People and Ecosystem in Selected Areas in Kozhikode District of Kerala”Proc.3rd International Conference on Hydrology and Watershed Management,Hyderabad, Vol II pp 839-845

Manjula, P. and Unnikrishnan Warrier, C. (2010), Morphometric analysis of Thuthapuzha Sub Basin of Bharathapuzha, Young Environmental Researchers Conference, CWRDM (March 22-23, 2010) Abs. p 5

Soorya, V.C., Manjula, P., Unnikrishnan Warrier, C., Resmi, T. R. (2010), Geochemical Studies Of Groundwater In Thutha Sub Basin Of Bharathapuzha. Young Environmental Researchers Conference, CWRDM (March 22-23, 2010) Abs. Vol. p. 3

Harikumar P S Liquid Waste Management-Sectoral Inventory State Level Workshop on National Urban Sanitation Policy, WSP, LSG (GOK), Ministry of Urban Development, GOI, Thrissur, 23 Nov 2009 (key note paper)

Harikumar P S Water Quality Status of Kerala with Special Reference to Drinking Water Proc.of Kerala Environment Congress 2009, 19-21 August Thiruvanthapuram (invited paper),

Jisha T.S, Prajitha K and Harikumar P.S, Study of Seawater Intrusion in the Groundwater of Kadalundi River Basin Proc.of the National Seminar on Current Advances in Chemical Sciences, Kannur, Aug 21-22, 2009.

Litty Joseph, Madhavan Komath and P.S Harikumar(2009) Water quality assessment of groundwater sources of Kunnamangalam Grama Panchayat, Calicut, Kerala. Proceedings of 19th Swadeshi Science Congress held at Kerala Agricultural University, Thrissur during 10-12 December,2009

Moly A and Harikumar P S Water and Sediment Quality Assessment of Selected Reservoirs of Bharathapuzha River Basin, Proc.of the National Seminar on Current Advances in Chemical Sciences, Kannur, Aug 21-22,2009

Nasir U P and Harikumar P S Monitoring of heavy metal toxicity and its distribution by ecological risk assessment method and with isotopes - A case study of Cochin estuary Proc. XXI Kerala Science Congress, Kollam.2009

P S Harikumar, V P Dinesan and A B Anitha(2009) ‘Improving Quality of life through R & D Intervention and networking of Local Government and Community- a case study of Calicut City’ Workshop on ‘Innovations in the Water Sector’, January 20-23, 2009, Pune, United States –India Educational Foundation (USIEF) , Fulbright Indo-American Environmental Leadership Program

P.S.Harikumar, Dinesan,V.P and A.B.Anitha.(2009). Improving quality of life through R & D Intervention and networking of Local Government and Community-A Case study of Calicut City. Proc. Workshop on Innovations in the Water Sector, United States-India Educational Foundation (USIEF), 20-23, January,2009,pp.29.

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.