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Stratigrafi och överplöjning i Bussjösjöområdet, Ystad

Thuning, Bengt and Linderson, Hans (1986) In Examensarbeten i geologi vid Lunds universitet
Department of Geology
Abstract
Summary: Lake Bussjö is an 0.3 hectare large kettle hole in a hummocky morain landscape four kilometers north of Ystad.
The purpose of this study is to investigate the stratigraphy and reconstruct the highest water level. Another task is to estimate the rate of farmland advance on earlier grazingland and swamps. Furthermore, to calculate the future development of the lake.
To make the stratigraphy clear, six sections have been made, including 59 sediment profiles, which six have been done earlier (Dearing et al 1986 unpublished). Mainly Russian sampler and helical auger were used to penetrate the ground. In the laboratory a minerogenic magnetic method, IRM, has been used to correlate some of the sediment profiles. Correlation has been... (More)
Summary: Lake Bussjö is an 0.3 hectare large kettle hole in a hummocky morain landscape four kilometers north of Ystad.
The purpose of this study is to investigate the stratigraphy and reconstruct the highest water level. Another task is to estimate the rate of farmland advance on earlier grazingland and swamps. Furthermore, to calculate the future development of the lake.
To make the stratigraphy clear, six sections have been made, including 59 sediment profiles, which six have been done earlier (Dearing et al 1986 unpublished). Mainly Russian sampler and helical auger were used to penetrate the ground. In the laboratory a minerogenic magnetic method, IRM, has been used to correlate some of the sediment profiles. Correlation has been completed with pollen analyses. Studying of maps is an important part of our work, not least in order to find out the advance of cultivated land during the last two centuries.
The results show that the highest water level of lake Bussjö has been three to four meters above the recent level during early postglacial.
Mainly fine detritus gyttja deposition is recorded. But the upper part has a considerable amount of minerogenic content, according to a higher erosion level since agricultural work has been developed. The lake is surrounded by carr peat depositions. According to the macrofossil content and the pollen analyses, these were formed in an alder swamp forest.
Farmer land is gradually moving over the former wet lands towards the lake, due to ploughing and water transport. This process is strongly varying in different conditions. In the lake Bussjö area the advance has a mean rate of about 0.4 meter/year. The sedimentation rate is estimated at 15 millimeters/year in recent time and is expected to increase in the future. Altogether, this means that the
lake will be filled and incorporated with ploughed land within 100-150 years. (Less)
Please use this url to cite or link to this publication:
author
Thuning, Bengt and Linderson, Hans
supervisor
organization
year
type
H1 - Master's Degree (One Year)
subject
keywords
georafi, geologi, stratigrafi, överplöjning, Bussjöområdet, Ystad
publication/series
Examensarbeten i geologi vid Lunds universitet
report number
15
language
Swedish
id
2371167
date added to LUP
2012-05-22 13:45:24
date last changed
2012-05-22 13:45:24
@misc{2371167,
  abstract     = {Summary: Lake Bussjö is an 0.3 hectare large kettle hole in a hummocky morain landscape four kilometers north of Ystad.
The purpose of this study is to investigate the stratigraphy and reconstruct the highest water level. Another task is to estimate the rate of farmland advance on earlier grazingland and swamps. Furthermore, to calculate the future development of the lake.
To make the stratigraphy clear, six sections have been made, including 59 sediment profiles, which six have been done earlier (Dearing et al 1986 unpublished). Mainly Russian sampler and helical auger were used to penetrate the ground. In the laboratory a minerogenic magnetic method, IRM, has been used to correlate some of the sediment profiles. Correlation has been completed with pollen analyses. Studying of maps is an important part of our work, not least in order to find out the advance of cultivated land during the last two centuries.
The results show that the highest water level of lake Bussjö has been three to four meters above the recent level during early postglacial.
Mainly fine detritus gyttja deposition is recorded. But the upper part has a considerable amount of minerogenic content, according to a higher erosion level since agricultural work has been developed. The lake is surrounded by carr peat depositions. According to the macrofossil content and the pollen analyses, these were formed in an alder swamp forest.
Farmer land is gradually moving over the former wet lands towards the lake, due to ploughing and water transport. This process is strongly varying in different conditions. In the lake Bussjö area the advance has a mean rate of about 0.4 meter/year. The sedimentation rate is estimated at 15 millimeters/year in recent time and is expected to increase in the future. Altogether, this means that the
lake will be filled and incorporated with ploughed land within 100-150 years.},
  author       = {Thuning, Bengt and Linderson, Hans},
  keyword      = {georafi,geologi,stratigrafi,överplöjning,Bussjöområdet,Ystad},
  language     = {swe},
  note         = {Student Paper},
  series       = {Examensarbeten i geologi vid Lunds universitet},
  title        = {Stratigrafi och överplöjning i Bussjösjöområdet, Ystad},
  year         = {1986},
}