|
|
|
|
|
| Koskiaho, Jari; Kivisaari, Simo; Vermeulen, Stephan; Kauppila, Raimo; Kallio, Kari; Puustinen, Markku. |
| Reduced tillage was compared with traditional ploughing in terms of erosion and phosphorus (P) and nitrogen (N) losses in an experimental field in southern Finland. One part of the field has been ploughed (treatment PF) and the other part harrowed (treatment NPF) every autumn since 1986. Flow volume and water quality data was collected separately from surface runoff and subsurface drainage waters during 1991-1995 (surface runoff volume since 1993). Erosion was higher in PF (on average 234 kg ha-1yr-1 in drainage flow and 479 kg ha-1 yr-1 in surface runoff) than in NPF (158 kg ha-1yr-1 in drainage flow and 160 kg ha-1yr-1 in surface runoff). Total N loss in drainage flow was also higher in PF (7.2 kg ha-1yr-1) than in NPF (4.6 kg ha-1yr-1). Total P losses... |
| Tipo: Journal paper |
Palavras-chave: Environmental aspects. |
| Ano: 2002 |
URL: http://orgprints.org/16825/1/koskiaho.pdf |
| |
|
|
| Koskiaho, Jari. |
| Main purpose of the CWs (constructed wetlands) for the treatment of runoff from agricultural areas is to reduce nutrient loading to surface waters and hence combat eutrophication. The most important single design parameter controlling retention effectiviness of a CW is its area in relation to the catchment area. Input concentrations, catchment properties(soil type!), hydraulic efficiency and CW soil properties also have a significant influence on the effectiviness. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2005 |
URL: http://orgprints.org/16058/1/wetlands1.pdf |
| |
|
|
|
