Snösmältning och avrinning från gröna extensiva tak
Green roofs are a popular way to include nature in an urban environment. How is runoff from green roofs in the cold and snow-covered part of the year, when growth media freeze, plants are dormant and covered with melting snow? This paper investigates 11 years of runoff from three green extensive roofs in Oslo, Norway. […]
Debatt: klimatrelaterad havshöjning: ett problem för Sverige?
Large changes are planned and implemented to meet the negative effects of the global warming forecasted by IPCC (Intergovernmental Panel on Climate Change). For example, some municipalities in Sweden have plans for protection walls against future rising sea levels and decisions have also in some cases been taken to build walls. All these measures and […]
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 […]