| |
| Web URL(s): | http://www.sciencedirect.com/science/article/pii/S0378377400001049
Last checked: 05/30/2013
Access conditions: Item is within a limited-access website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Wesström, Ingrid;
Messing, Ingmar;
Linnér, Harry;
Lindström, Jan |
|---|
| Author Affiliation: | Department of Soil Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden |
|---|
| Title: | Controlled drainage - effects on drain outflow and water quality |
|---|
| Source: | Agricultural Water Management. Vol. 47, No. 2, March 2001, p. 85-100. |
|---|
| Publishing Information: | [Amsterdam]: Elsevier Scientific Pub. |
|---|
| # of Pages: | 16 |
|---|
| Keywords: | TIC Keywords: Drainage; Water quality; Hydrology; Environmental effects; Risers; Subsurface drainage; Precipitation; Soil temperature; Air temperature; Water management; Nitrogen; Phosphorus; Leaching; Nitrate nitrogen
|
|---|
| Abstract/Contents: | "A field experimental project was set up in southern Sweden to assess the effects of controlled drainage on hydrology and environment. Controlled drainage makes it possible to vary the drainage intensity with the variation in drainage requirement during season by controlling the height of a riser in the drain outlet and thus to a certain degree control the amount of outflow of solutes via the drainage system. During periods with low drainage demand, the riser in the drain outlet can be raised and the groundwater level in field will rise up to the level of the riser before the discharge takes place. Three plots, each with an area of 0.2 ha (40mx50m) were installed on a loamy sand. One plot was drained by conventional subsurface drainage (CD) and two plots were drained by controlled drainage (CWT). The plots contained four lateral drain tubes, at 10 m spacing and placed at 1 m depth. Each plot was isolated by a double layer of plastic sheeting placed in the back-filled trenches to a depth of 1.6 m to prevent lateral leakage and subsurface interactions. Measurements of precipitation, drain outflow and soil and air temperatures were carried out hourly. Groundwater levels were measured and samples of drain outflow were collected twice a month for nitrogen and phosphorus analyses. Mineral nitrogen contents in soil were measured three times a year. Controlled drainage had a significant hydrological and environmental effect during the 2 years of measurement (1996-1998). Compared with CD, the total drain outflow from CWT was 79% less in Year 1 and 94% in Year 2. The total reduction in nitrate losses with CWT corresponded to the reduced outflow rates. Compared with CD, the total amounts of nitrate in drain outflow were 78% less in Year 1 and 94% in Year 2. The highest concentrations of nitrate were measured at the time of the largest outflow rates. The phosphorous losses were 58% less for CWT as compared to the CD values in Year 1 and 85% less in Year 2. The reduction in nitrogen content in the soil profile during the winter season was 60-70% less in CWT than in CD." |
|---|
| Language: | English |
|---|
| References: | 30 |
|---|
| Note: | Figures
Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wesström, I., I. Messing, H. Linnér, and J. Lindström. 2001. Controlled drainage - effects on drain outflow and water quality. Agric. Water Manage. 47(2):p. 85-100. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=107657 |
| If there are problems with this record, send us feedback about record 107657. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://www.sciencedirect.com/science/article/pii/S0378377400001049
Last checked: 05/30/2013
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: S 494.5 W3 A34 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
