Mrudulrag, S. K., Sui, A. S., Resmi, T. R and Shahul Hameed, A., 2012. Water Quality Variations in the Shallow Wells and Streams of Neyyar River Basin, Kerala, Proceedings of the National Seminar on ‘Sediments and sedimentary rocks: Resource potential Depositional processes, its Implications to the ecosystem and environmental changes’, December 18-21, Pondichery, India, p.121.

Shahul Hameed, A and Resmi T. R., 2012. Origin of pollutants in the coastal shallow aquifers of an urban environment–Investigation using ionic and isotopic ratios. Proceedings of the 2nd International Conference on Water Quality, WQ-2012, 19-21, September, HangZhou, China, pp.26-30.

Shahul Hameed, A., Resmi, T.R., Suraj, S.S., 2012. Estimation of groundwater by rain in a tropical river basin using stable isotope technique, Proceedings of the Vth International Groundwater Conference (IGWC 2012), 18-21 December, Aurangabad, India, pp.138.

Subhankar Karmakar and Harikumar P S Evaluation of water quality monitoring network: a multivariate statistical approach to Kabbini river catchment (India) IWA World Water Congress and Exhibition 2012 Korea

Unnikrishnan Warrier, C. and Manjula, P., 2012. Tracing river-groundwater Interaction of a Tropical Sub Basin of Bharathapuzha, Kerala, National Seminar on Applications of Isotopes and Radiation Technology for Societal Benefits (AIRTS-2012) June 21-23, 2012, Bangalore University. Abs.Vol. p 43.

Jalaja T K, Lazna V P, Sreevallabhan S, Jayakumar P and Jayakumar K V(2011), Biodiversity of insect fauna in selected ssacred groves of Kozhikode with special reference to soil and water conservation, Proc.3rdInternational Conference on Climate Change, Forest Resource and Environment(ICCFRE-2011), Kerala University, Thiruvananthapuram

Resmi T R (2011). Isotope Fingerprinting of a Tropical River Basin using Isotope Systematics. Proc. of the 23rd Kerala Science Congress, CESS, Thiruvananthapuram, pp.103.

Harikumar P S Water Quality Management of India-Issues and Challenges, Proc.of National Conference on Environmental Pollution, Coimbatore, March 31,2010 (key note paper)

K.N.Remani and T.K.Jalaja(2010)“Removal of Microbes from Wastewater using Wetland Plants”Proc. 3rd International Conference on Hydrology and Watershed Management Vol II pp 1197-1202

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.