Element balances and retention for wetlands in the forest environment : case study Bohyttan fen
The importance of water quality, protection of watersheds and restoration of aquatic ecosystems has steadily been gaining attention. Wetlands perform many functions that are beneficial to water quality, and also play an important role in forested landscapes. Peatlands in forested catchments act as b...
| Autor principal: | |
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| Formato: | L3 |
| Lenguaje: | Inglés sueco |
| Publicado: |
SLU/Dept. of Forest Soils
2007
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| Materias: |
| _version_ | 1855571923376799744 |
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| author | Lucci, Gina |
| author_browse | Lucci, Gina |
| author_facet | Lucci, Gina |
| author_sort | Lucci, Gina |
| collection | Epsilon Archive for Student Projects |
| description | The importance of water quality, protection of watersheds and restoration of aquatic ecosystems has steadily been gaining attention. Wetlands perform many functions that are beneficial to water quality, and also play an important role in forested landscapes. Peatlands in forested catchments act as both sinks and sources for different nutrients. The effects of leached nutrients from a forested catchment on a fen and the retention properties of the fen were investigated using data collected from the Bohyttan fen in the commune of Nora, Sweden. In addition, the effects of forestry management on nutrient loading and how the fen affects the flow of nutrients into the nearby lake were also investigated.
Runoff measurements into and out of the fen were calculated using v-notch weirs and water level recorders. Water samples were collected monthly and used to calculate nutrient balances and retention of different elements. The effects of different forest management practices on nutrient leaching were investigated using the calibration period and control area technique.
The peatland retention was obvious for nitrate (34%), ammonium (6%) phosphate (5%), potassium (8%) and sulfate (7%). Nitrate retention is beneficial for water quality and helps to mitigate the effects of nutrient leaching, however the peatland exported organic nitrogen (-6.5%) and iron (-9%). Results show that the effects of forestry practices like clear-cutting increased the transport of nitrate and potassium even six years after it was carried out. Ditching of a cleared forest stand lowered the groundwater and also caused a rise in the pH of nearby stream water.
Leaching from forest land showed a correlation between high water color, DOC and iron concentrations. These conditions furnish additional organic matter and lead to a deterioration in water quality. |
| format | L3 |
| id | RepoSLU11707 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés swe |
| publishDate | 2007 |
| publishDateSort | 2007 |
| publisher | SLU/Dept. of Forest Soils |
| publisherStr | SLU/Dept. of Forest Soils |
| record_format | eprints |
| spelling | RepoSLU117072017-11-23T12:20:07Z Element balances and retention for wetlands in the forest environment : case study Bohyttan fen Ämnesbalanser och retention för våtmarker i skogslandskapet : exempel Bohyttekärret Lucci, Gina retention element balances wetlands peatland water quality forestry The importance of water quality, protection of watersheds and restoration of aquatic ecosystems has steadily been gaining attention. Wetlands perform many functions that are beneficial to water quality, and also play an important role in forested landscapes. Peatlands in forested catchments act as both sinks and sources for different nutrients. The effects of leached nutrients from a forested catchment on a fen and the retention properties of the fen were investigated using data collected from the Bohyttan fen in the commune of Nora, Sweden. In addition, the effects of forestry management on nutrient loading and how the fen affects the flow of nutrients into the nearby lake were also investigated. Runoff measurements into and out of the fen were calculated using v-notch weirs and water level recorders. Water samples were collected monthly and used to calculate nutrient balances and retention of different elements. The effects of different forest management practices on nutrient leaching were investigated using the calibration period and control area technique. The peatland retention was obvious for nitrate (34%), ammonium (6%) phosphate (5%), potassium (8%) and sulfate (7%). Nitrate retention is beneficial for water quality and helps to mitigate the effects of nutrient leaching, however the peatland exported organic nitrogen (-6.5%) and iron (-9%). Results show that the effects of forestry practices like clear-cutting increased the transport of nitrate and potassium even six years after it was carried out. Ditching of a cleared forest stand lowered the groundwater and also caused a rise in the pH of nearby stream water. Leaching from forest land showed a correlation between high water color, DOC and iron concentrations. These conditions furnish additional organic matter and lead to a deterioration in water quality. Betydelsen av vattenkvalitet, skydd av vattentäkter och restaurering av akvatiska ekosystem har fått ökad uppmärksamhet. Våtmarker bidrar till många viktiga funktioner som är välgörande för vattenkvalitet och de spelar en viktig roll i skogslandskapet. Torvmarker i beskogade avrinningsområden fungerar både som näringsfällor och näringskällor. Effekterna av näringsläckage från skog på ett kärr och retentionsegenskaper av kärret undersöks med hjälp av data samlat från Bohyttekärret i Nora kommun. Dessutom har skogsbrukets effekter på näringsläckage samt hur kärret påverkar utflödet av näring till en intilliggande sjö undersökts. Vattenflödet till och från kärret beräknades med vattenföringsstationer. Vattenprover togs varje månad och användes för att beräkna närningsbalanser och retention av olika ämnen. Effekterna av skogsbruket på närningsutlakning undersöktes med kalibrering och kontrollmetoden. Torvmarkens retention var uppenbar för nitrat (34%), ammonium (6%), fosfat (5%), kalium (8%) och sulfat (7%). Nitrat retention förbättrar vattenkvalitet och bidrar till att minska näringsbelastningen, däremot exporterade våtmarken organiskt kväve (-6.5%) och järn (-9%). Resultat visade också att effekterna av avverkning ökade transporten av nitrat och kalium upp till sex år efter åtgärd. Dikning av en avverkad skogsmark sänkte grundvattennivån och orsakade en höjning av pH i närliggande bäckvatten. För utlakning från skogsmark noterades samband mellan hög vattenfärg, DOC och järnkoncentrationer. Detta visar på ökad mängd organiskt material och leder till försämrad vattenkvalitet. SLU/Dept. of Forest Soils 2007 L3 eng swe https://stud.epsilon.slu.se/11707/ |
| spellingShingle | retention element balances wetlands peatland water quality forestry Lucci, Gina Element balances and retention for wetlands in the forest environment : case study Bohyttan fen |
| title | Element balances and retention for wetlands in the forest environment : case study Bohyttan fen |
| title_full | Element balances and retention for wetlands in the forest environment : case study Bohyttan fen |
| title_fullStr | Element balances and retention for wetlands in the forest environment : case study Bohyttan fen |
| title_full_unstemmed | Element balances and retention for wetlands in the forest environment : case study Bohyttan fen |
| title_short | Element balances and retention for wetlands in the forest environment : case study Bohyttan fen |
| title_sort | element balances and retention for wetlands in the forest environment : case study bohyttan fen |
| topic | retention element balances wetlands peatland water quality forestry |