About this book
Nutrient enrichment of water resources by inputs of nitrogen and phosphorus, which can lead to eutrophication is still a water quality problem in agriculturally dominated watersheds around the world. Internationally, wetlands both constructed and natural are increasingly being used to help reduce both point and non-point source nutrient and contaminant loss from agricultural practices. This publication contains papers presented at the international symposium on "Nutrient Management in Agricultural Watersheds: A Wetlands Solution," which was held during May, 2004 in Wexford, Ireland.
These proceedings cover aspects of water quality within agricultural watersheds; management practices to mitigate contaminant and nutrient loss from agriculture; wetland biogeochemistry; wetland functions and values within agricultural dominated landscapes; case studies of wetlands used to retain nutrient and contaminant loss from agriculture; and finally some management and policy issues concerning wetlands are presented. This book provides a good interdisciplinary synthesis of international experiences both in Europe and the USA on the use of wetlands within agricultural watersheds.
Organising Committee 11; Sponsors 11; 1. Introduction; Introduction 13; 2. Diffuse loss of nutrients and contaminants from agriculture; Water quality in Ireland - diffuse agricultural eutrophication - a key problem 15; M. McGarrigle; Soil hydrology as a factor in diffuse phosphorus pollution 18; C. O'Reilly, W.L. Magette, K. Daly and O.T. Carton; Flow effects on phosphorus loss in overland flow 23; D. Doody, I. Kurz H. Tunney and R. Moles; Effects of runoff from agricultural catchments on fishpond water chemistry: A long-term study from Trebon fishponds 28; L. Pechar, J. Bastl, M. Hais, L. Kropfelova, J. Pokorny, J. Stichova and J. Sulcova; Assessment of landscape efficiency in matter retention in submontane agricultural catchments of the Czech Republic 34; L. Pechar, J. Prochazka, M. Hais, E. Pecharova, M. Eiseltova, L. Bodlak. J. Sulcova and L. Kropfelova; 3. Functions and values of wetlands within agricultural landscapes; Wetlands of Ireland - An overview: diversity, ecosystem services and utilization 39; M.L. Otte; Wetland functions and values in agricultural watersheds: an American perspective 46; M.W. Clark; Wetland restoration within agricultural watersheds: balancing water quality protection with habitat conservation 55; A. Niedermeier, J.S. Robinson and D. Reid. Watershed management and Reelfoot Lake: The role of wetlands 71; P.M. Gale; Spatially distributed isolated wetlands for watershed-scale treatment of agricultural runoff 80; D.B. Perkins, A.E. Olsen and J.W. Jawitz; 4. Wetland biogeochemistry; Nitrogen cycling in wetland systems 93; P.G. Hunt, M.E. Poach and S.K. Liehr; Phosphorus biogeochemistry of wetlands in agricultural watersheds 105; E.J. Dunne and K.R. Reddy; 5. Wetlands, water quality and agriculture; Retention of soil particles and phosphorus in small constructed wetlands in agricultural watersheds 121; B.C. Braskerud; Constructed wetlands to remove nitrate 132; R.H. Kadlec; Constructed wetlands to retain contaminants and nutrients, specifically phosphorus from farmyard dirty water in Southeast Ireland 144; E.J. Dunne, N. Culleton, G. O'Donovan and R. Harrington; The use of constructed wetlands with horizontal sub-surface flow for treatment of agricultural drainage waters together with sewage 157; J. Vymazal; Wetlands for treatment of nutrient laden runoff from agricultural lands: models and stormwater treatment area 1W, as a case study for protection of the Everglades ecosystem, USA 161; J.R. White and M.A. Belmont; Treatment wetlands for removing phosphorus from agricultural drainage waters 167; T.A. DeBusk, K.A. Grace and F.E. Dierberg. 6. Integrated constructed wetlands in Ireland; The concept, design and performance of integrated constructed wetlands for the treatment of farmyard dirty water 179; R. Harrington, E.J. Dunne, P. Carroll, J. Keohane and C. Ryder; Integrated constructed wetlands: regulatory policy and practical experience in an Irish planning context 189; C. Ryder, P. Carroll, R. Harrington and J. Keohane; Integrated constructed wetlands for farmyard dirty water treatment: a site suitability assessment 196; J. Keohane, P. Carroll, R. Harrington and C. Ryder; Water treatment performance and environmental impact of integrated constructed wetlands in the Anne valley watershed, Ireland 207; P. Carroll, R. Harrington, J. Keohane and C. Ryder; 7. Constructed wetlands and water quality; The relationship between plant vigour and ammonium concentrations in surface waters of constructed wetlands used to treat meat industry wastewaters in Ireland 219; A. Harrington; A small-scale constructed wetland to treat different types of wastewaters 224; G. Garcia-Cabellos, M. Byrne, M. Stenberg, K. Germaine, D. Brazil, J. Keohane, D. Ryan and D.N. Dowling; Constructed wetlands for wastewater treatment in Europe 230; J. Vymazal; Microbiological studies on an integrated constructed wetland used for treatment of agricultural wastewaters 245; S. McHugh, K. Richards, E.J. Dunne, R. Harrington and V. O'Flaherty; 8. Policy and management of constructed wetland to treat single household and farm-scale wastewaters in Ireland; Wetlands for the management of soiled water: a perspective from the Department of Agriculture and Food, Ireland 251; C. Robson. Constructed wetlands for wastewater treatment in rural communities 255; M. Keegan and F. Clinton; Cost effective management of soiled water from agricultural systems in Ireland 260; N. Culleton, E. Dunne, S. Regan, T. Ryan, R Harrington and C. Ryder; 9. Final discussion; Panel summary and concluding remarks 271; Author index 281; Keyword index 283.