| dc.description.abstract | Climate change has led to more frequent and faster precipitation events, which create major
challenges in stormwater. the wiring is outdated and undersized and the urbanized area consists
mainly of dense surfaces, which do not infiltrate the rainwater, as a result, there have been greater
flooding and flooding problems. To reduce the harmful effect of this, climate-adapted measures,
such as reopening streams. By reopening streams, one will be better equipped for future
precipitation events. Open water mirrors increase opportunities for outdoor activities and beleaguer
public health while strengthening the aquatic environment and biodiversity.
Grimstad municipality intends to reopen the stream over Tønnevoldsjordet, in connection with
strengthening stormwater management and creating an open-air area. This task describes how
reopening the stream can contribute as a resource to the area. The purpose has been to look at the
possibilities of stream reopening, park solutions, and local stormwater management to relieve the
existing pipeline network. The zoning plan for the area was used to see how future developments
could affect the stream opening. The calculation was then carried out before and after development,
with a return period of 5 and 25 years. In addition, a water meter was placed, which measured water
flow, for 2 months. The calculations were further assessed and used to dimension a digestion pond
to handle the volumes of water from the area. The area around the stream was designed for the park
and tour area, to create a hub that would offer something for everyone. The measures chosen for
the area have been chosen to reduce stormwater issues and make the park a resource for users. | |