13 uppsatser
förslag till anläggning för ekologisk hantering samt metodöversikt
Stormwater in urban areas has been treated as a problem for a long time. The large proportion of impermeable surfaces inhibits the water from infiltrating in the ground to the same extent that it does in nature. This causes intensive surface flow during rain, which in turn …
en simuleringsstudie med modellen SEWSYS
… to protect the water. However, there is a lot of contribution of untreated stormwater to Göta Älv within the protection area. Göteborg Water and Sewage Works commissioned this thesis where two areas, Tagene industrial area and Kärra residential area, with untreated stormwater …
Lösningsförslag för Eurostop köpcentrum i Halmstad
Stormwater from trafficked areas often contains high pollution levels. In traditional stormwater management design, stormwater is first transported away through piped networks, and then in most cases passes through oil separators before finally reaching the recipients. While …
En kartläggning av Vallentuna tätorts dagvattenhantering utifrån dess tillsynsbehov
… to ensure good water quality in Europe's water bodies. Discharge of polluted stormwater into receiving waters can be a threat to their ecological and chemical status. Municipalities are responsible for supervision of the environmental quality standards (EQS) and therefore need …
Stormwater run-off from surfaces such as roads or rooftops is often polluted with heavy metals and nutrients. Many of these substances can cause great damage in biota if they end up in the recipient. In Sweden constructed wetlands and ponds for treatment of stormwater are …
med studie av Osbäcken
… watercourse when restorations are made. To apply an ecological approach to the stormwater management, only 125 hectare of pond area is required for the urban environment in Gothenburg. In the most urban areas most ponds are needed, but there is a lack of space. The space, for an …
… of sensitivity and unceartainty analysis have been applied to the operative stormwater- and recipient model StormTac. The study area is the watershed of lake Flaten in the municipality Salem. StormTac’s submodels for stormwater, pollutant transport and the recipient are …
In times of increased flooding, enhanced by climate change, polluted stormwater poses an increased threat to the environment through contaminated water entering waterways. Bioretention utilizes natural processes in soil and vegetation to treat pollutants and combat this threat …
Inmätning av Karlbergsån i Grums kommun
… and to counteract flooding. Grums Municipality was also interested in survey stormwater discharges which may affect the water level in the stream. The requirement for measurement accuracy must be reached is less than 0.1 m in height with the maximum of 10 m between the measured …
Ett utredande förslag
Som följd av den pågående urbaniseringen har de naturliga förutsättningarna för regn och smältvattnet att infiltrera i marken och återgå till sitt kretslopp på naturlig väg försvunnit i städerna. I Stockholm leds ungefär hälften av dagvattnet via VA-nätet direkt och orenat till …
en studie med flödesproportionell provtagning
Dagvatten kallas det regn- och smältvatten som rinner av från hårdgjorda ytor i stadsmiljön. Detta vatten för ofta med sig stora mängder av föroreningar som tungmetaller, näringsämnen och oljerelaterade ämnen, vilka kan göra stor skada om de når recipienter. För att rena …
I Jönköping har problemet med översvämningar, erosion och materialtransport varit ett stort problem i Strömsbergsbäcken i Jönköpings kommun. Detta har tillviss del orsakats av ett ökat dagvattenutsläpp i bäcken, vilket skapar kraftigaflödestoppar då den ursprungliga fåran inte …
Kväve- och fosforrening i anlagda våtmarker.
… consistedof process water from manufacturing and water used for cleaning, no stormwater or sewagewater entered the system. Tests were taken three times a month from October 2013 ?til April2014. The mean influent concentrations from wastewater directly from the factory were2,606 …
