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Water Pollution


Newspaper article to the Otago Daily Times. Organic farming: Sifting through the evidence. 2 September 2019.

Newspaper article to the Otago Daily Times. Tackling Lake Hayes’ water quality. 6 September 2018.

Selvarajah, S. 2020. Central government management of the freshwater under the Resource Management Act – An RMA practitioner’s perspective. In: Nutrient Management in Farmed Landscapes. (Eds. C.L. Christensen, D.J. Horne and R. Singh). Occasional Report No. 33. Farmed Landscapes Research Centre, Massey University, Palmerston North, New Zealand. 16 pages.

Selvarajah, S. 2015. Effective human wastewater management in rapidly growing towns in sensitive receiving environment- A perspective on Queenstown-Lakes District area. KEYNOTE PAPER. New Zealand Land Treatment Collective Conference, Wanaka, New Zealand March 25-27, 2015.

Selvarajah, S. 2015. Can the RMA toolbox provide effective tools to manage the impact of farming on freshwater quality? In: Moving farm systems to improved nutrient attenuation. (Eds L.D. Currie and L.L. Burkitt). Occasional Report No. 28. Fertilizer and Lime Research Centre, Massey University, Palmerston North, New Zealand. 15 pages.

Selvarajah, S. 2011. Key wastewater discharge consents granted in the Otago Region in the past decade. Otago Regional Council Committee Paper. 

McLay, C.D.A., Dragten, R., Sparling, G., and Selvarajah, N. 2001. Predicting groundwater nitrate concentrations in a region of mixed agricultural land use: a comparison of three approaches. Environmental Pollution, 115 (2001) 191-204.

Barkle, G.F, Brown, T.N, Singleton, P.L, Selvarajah, N and Painter, D.J. 1998. Impact of controlled drainage on nitrogen leaching and solute behaviour. In Drainage in the 21st century: Food production and the Environment, (Ed Brown, L.C), American Society of Agricultural Engineers, Orlando, Florida, U.S.A. pp 638-648.

Selvarajah, N. 1998. Management of grazed dairy pasture to minimise impacts on lake water quality. In The RMA the best practicable options!?$, Resource Management Law Association of New Zealand Inc 6th Annual Conference, 24-27 September 1998.

Boothroyd, I., Crush, J.R., Ledgard, S.F., Huser, B. and Selvarajah, N. 1997. Impacts of nitrogen flows from agricultural production environments on biodiversity of non-agricultural ecosystems in the Waikato region, New Zealand. ABSTRACT. In: Conservation in production environments. Nature Conservation 5.

Ray, D.E., Balks, M., Barkle, G.F. and Selvarajah, N. 1997. Why do dairy farm effluent ponds leak? Proceedings of the New Zealand Water and Wastes Association Conference, Rotorua, New Zealand. pp 273-278.

Selvarajah, N. 1996. Dairy farm effluent treatment pond performance in the Waikato Region: A preliminary review of the regional survey. In Tertiary treatment options for dairyshed and piggery watsewaters workshop. Department of Agricultural Engineering, Massey University, Palmerston North.

Ledgard, S.F., Selvarajah, N., Jenkinson, D., and Sprosen, M.S. 1996. Groundwater nitrate levels under grazed dairy pastures receiving different rates of nitrogen fertiliser. In Recent developments in understanding chemical movements in soils: Significance in relation to water quality and efficiency of fertiliser use. (Eds L D Currie and P Loganathan). Occasional report No. 9. Fertilizer and Lime Research Centre, Massey University, Palmerston North. pp 229-236.

Ray, D.E., Barkle, G.F., Selvarajah, N., McLeod, M., and Balks, M.R. 1995. Seepage from dairy farm effluent treatment ponds. New Zealand Waste and Water Association Conference Proceedings. pp 141-144.

Selvarajah, N., Maggs, G.R., Crush, J.R. and Ledgard, S.F. 1994. Nitrate in ground water in the Waikato region In: The Efficient Use of Fertilisers in a Changing Environment: Reconciling productivity with sustainability. (Eds. L D Currie and P Loganathan). Occasional Report No. 7. Fertiliser and Lime Research Centre, Massey University, Palmerston North, New Zealand. pp 160-185.