The need for knowledge about operation and maintenance of stormwater ponds increases as the number of stormwater ponds in the country increases and the ponds get older. It is partly about how ponds can be managed in a cost-effective way, partly how operation and maintenance efforts should be planned and how they affect the values […]
Författare
Jesper Persson, Jonas Andersson, Robert Jönsson, Astrid Berglund
Nyckelord (Keyword)
stormwater; pond; maintenance; operation; cost; pond design
Årgång
2022
Nummer
4
Utgåva
Placing water tanks or water pipes under water has the advantage that the walls are subjected to a much lower pressure difference. An underwater tank, where the walls are made from a flexible material like canvas, instead of metal or concrete, can adjust its volume to exactly the volume to be stored inside. Tennis tents […]
Författare
Jan-Erik Nowacki
Nyckelord (Keyword)
Underwater storage, pipe, canvas, Gotland
Årgång
2022
Nummer
4
Utgåva
Flowing water impacts bridges over rivers primarily in two ways: (1) hydrodynamic forces that directly impact the structure and (2) scouring at piers and abutments, including contraction scour. The design prin-ciples for bridges in Sweden, including both impacting forces and local scour, are relatively simplistic. The purpose of this paper is to examine the impact […]
Författare
Assad Tahir, Fainaz Inamdeen, and Magnus Larson
Nyckelord (Keyword)
Extreme river flow, River hydraulics, Bridge scour, HEC RAS, Ljungby, Lagan
Årgång
2022
Nummer
4
Utgåva
The electricity prices in Sweden and Europe during 2022 have reached very high levels. The main reason for this being the war in Ukraine, which has led to a decreased availability for gas. During summer, the electricity prices reached extreme levels when meteorological and hydrological factors worsened the situation on the electricity market. The highest […]
Författare
Stefan Söderberg, Magnus Persson
Nyckelord (Keyword)
electricity prices, hydrology, hydrological balance, low flow
Årgång
2022
Nummer
4
Utgåva