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Översvämningskartering av Vombs ängar

Göthe, Astrid (2002) In Lunds universitets Naturgeografiska institution - Seminarieuppsatser
Dept of Physical Geography and Ecosystem Science
Abstract
Vomb meadows is an area well knows for its rich bird life. During the 19:th
century until mid 20:th century, the meadows were flooded annually in order to
increase the hay yield. The river Klingavälsån situated along the west side of the
meadows, used to be a shallow river, meandering across the landscape. In the
1940’s the river was straightened and made deeper. This was done in purpose of
draining the area around the river, thus enabling agriculture. The effects were that
Vomb meadows dried up, and many of the popular bird species disappeared from
the area.
Today the meadows are flooded again. The municipality of Lund has in a project
during 1999 and 2000, re-dug part of the river. It has through this regained the
former... (More)
Vomb meadows is an area well knows for its rich bird life. During the 19:th
century until mid 20:th century, the meadows were flooded annually in order to
increase the hay yield. The river Klingavälsån situated along the west side of the
meadows, used to be a shallow river, meandering across the landscape. In the
1940’s the river was straightened and made deeper. This was done in purpose of
draining the area around the river, thus enabling agriculture. The effects were that
Vomb meadows dried up, and many of the popular bird species disappeared from
the area.
Today the meadows are flooded again. The municipality of Lund has in a project
during 1999 and 2000, re-dug part of the river. It has through this regained the
former shallow bottom and the meandering shape; now flooding at 3 m3/s instead
of the earlier 6 m3/s. As a consequence, the groundwater level has also been
raised.
The result of the project has been evaluated by mapping the extent of the flooding
and comparing these maps with the flow in Klingavälsån. Three maps have been
made and the flow has been measured on five different occasions.
The spring of 2002 had a lot of precipitation and the meadows were flooded
during long periods. The floods were relatively evenly distributed over the
meadows. Water was mainly concentrated around ditches and in the northern part
of the meadows where the ground level is flatter and lower. The flooding varied
with the flow in Klingavälsån, thus depending on the precipitation. The high
flows have also created erosion in the brinks of Klingavälsån, creating good
possibilities for a continuing natural meandering of the river. The flows of the
magnitude that took place this year in Klingavälsån are calculated to occur around
every ninth year.
There are other measures to increase the flooding of Vomb meadows. To decrease
the groundwater gradient, dams can be built in the river. Big stones and rocks
placed in the river channel decrease the velocity of the river and therefore also its
drainage capacity, thus leaving more water standing on the ground surface.
Channels can be dug from the river in to the meadows, increasing the supply of
water when the level of the river is high enough. (Less)
Please use this url to cite or link to this publication:
author
Göthe, Astrid
supervisor
organization
year
type
H1 - Master's Degree (One Year)
subject
keywords
naturgeografi, climatology, cartography, Vomb meadows, flooding, physical geography, mapping, pedology, geomorphology, marklära, geomorfologi, kartografi, klimatologi
publication/series
Lunds universitets Naturgeografiska institution - Seminarieuppsatser
report number
93
language
Swedish
additional info
Ann Åkerman, Lunds kommun.
id
1333047
date added to LUP
2005-10-24 00:00:00
date last changed
2011-12-07 10:52:06
@misc{1333047,
  abstract     = {{Vomb meadows is an area well knows for its rich bird life. During the 19:th
century until mid 20:th century, the meadows were flooded annually in order to
increase the hay yield. The river Klingavälsån situated along the west side of the
meadows, used to be a shallow river, meandering across the landscape. In the
1940’s the river was straightened and made deeper. This was done in purpose of
draining the area around the river, thus enabling agriculture. The effects were that
Vomb meadows dried up, and many of the popular bird species disappeared from
the area.
Today the meadows are flooded again. The municipality of Lund has in a project
during 1999 and 2000, re-dug part of the river. It has through this regained the
former shallow bottom and the meandering shape; now flooding at 3 m3/s instead
of the earlier 6 m3/s. As a consequence, the groundwater level has also been
raised.
The result of the project has been evaluated by mapping the extent of the flooding
and comparing these maps with the flow in Klingavälsån. Three maps have been
made and the flow has been measured on five different occasions.
The spring of 2002 had a lot of precipitation and the meadows were flooded
during long periods. The floods were relatively evenly distributed over the
meadows. Water was mainly concentrated around ditches and in the northern part
of the meadows where the ground level is flatter and lower. The flooding varied
with the flow in Klingavälsån, thus depending on the precipitation. The high
flows have also created erosion in the brinks of Klingavälsån, creating good
possibilities for a continuing natural meandering of the river. The flows of the
magnitude that took place this year in Klingavälsån are calculated to occur around
every ninth year.
There are other measures to increase the flooding of Vomb meadows. To decrease
the groundwater gradient, dams can be built in the river. Big stones and rocks
placed in the river channel decrease the velocity of the river and therefore also its
drainage capacity, thus leaving more water standing on the ground surface.
Channels can be dug from the river in to the meadows, increasing the supply of
water when the level of the river is high enough.}},
  author       = {{Göthe, Astrid}},
  language     = {{swe}},
  note         = {{Student Paper}},
  series       = {{Lunds universitets Naturgeografiska institution - Seminarieuppsatser}},
  title        = {{Översvämningskartering av Vombs ängar}},
  year         = {{2002}},
}