Examining biofilm growth and metabolism of Escherichia coli at laboratory scale using geoelectrical methods
To link geophysical field data to specific biological phenomena, controlled laboratory experiments are needed for the understanding of the response of geophysical parameters to changes in biological conditions. In this study, suspensions of bacteria were mixed with sand to create a biofilm growing on a surface and these mixtures were monitored using the geoelectrical spectral […]
Regn i Båstad
On 18 August 2022, an extremely very local 45 minutes storm fell over Båstad. There are several observations close to or more than mm. In the summer 1937 there was a famous long-lasting rain, for which the daily value was 150 mm. During the summer 2007, there were many large rainstorms of around 75 mm. […]
Slamförsök på åkermark i Skåne – 40 års erfarenheter av slamspridning
In this article, we present experiences from 40 years of field studies in Scania, southern Sweden, of sewage sludge application on arable land. The field studies have been conducted with the same trial plan at two locations outside the cities of Malmö and Lund, respectively. The trial plan includes nine combinations of sludge application and […]
Algae and hydropower. Attached algal vegetation as indicator of disturbances of the lotic ecosystem
The aim of this article is to present an approach (modus operandi) for producing recommendations regarding potential hydropower development. A study of attached algae in 27 streams in mid Sweden according to extension of hydropower or not was carried out. The samples were taken already in 1982 and some of the streams and parts of […]
Hydrologiska aspekter på de höga europeiska elpriserna i augusti 2022
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 […]
Impact of extreme flows on bridges. A case study from Lagan river, Ljungby
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 […]
Storage and transport of water under water
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 […]
Kostnader vid anläggning, drift och underhåll av dagvattendammar
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 […]