In wintertime, a large amount of snow falls on roads, streets and parking lots in Gävle. Snow from urban areas may contain pollutants from sources such as atmospheric contamination, traffic emission and de-icing chemicals. These pollutants accumulate in the snow during the winter and are released when the snow melts in the spring and summer. Besides logistic and traffic safety, snow-handling strategies are an important issue for the municipal organization in terms of environmental effects from the melt water. Today, snow plowed in urban areas of Gävle are being transported to a snow deposit in the harbor of Gävle, Gävle hamn. In the future, the current location are going to be used by Gävle hamn. Therefore, the municipality of Gävle are looking at five different alternatives for localization of snow deposit. To determine which of the five alternative locations are suitable for construction of snow deposit in terms of environmental conditions, this study examines the different locations in terms of recipient, geology, biological consequences, land use and surroundings. If one large snow deposit, designed similar to the current one in Gävle hamn, is chosen to solve the snow handling in the future, location number 3 Ersbo syd would be the best option. Location 1 Fredriksskans, 2 Duvbacken and 5 Kungsbäck, has god potential to alone and/or in combination with another location, serve as area for snow deposit. Location number 4, Ersbo telepylon, should not be considered as an alternative location for a snow deposit. There are possibilities for unconventional solutions, such as district cooling or even use the snow to infiltrate in the ridge, the chance to reverse the snow-handling problem to a resource is great. Creative solutions could be a possibility to cover and prepare for the eventual environmental challenges the future may bring. / Under vintern faller nederbörd som snö i Gävle. När snömängden överstiger den volym som kan förvaras i anslutning till vägsystemen krävs bortforsling och deponering av snön. Den nuvarande snödeponin i Gävle ska i framtiden nyttjas av Gävle hamn, därmed ska lokalisering för ny plats för snödeponi utredas. Då snö från urbana miljöer innehåller förorenande ämnen är det av stor vikt att utreda depotentiella platsernas miljöförutsättningar. Syftet med denna studie är att undersöka hur olika miljöförutsättningar påverkar ett områdes lämplighet för anläggande av en ny snödeponi. Målet är att utifrån kunskap om miljöförutsättningar utvärdera och jämföra fem av Gävle kommun utpekade platser. Utifrån miljöförutsättningarna geologi, påverkan på recipient, biologiska konsekvenser, markanvändning och omgivning har de fem föreslagna platserna undersökts och slutligen jämförts. Resultatet visar att plats 3 Ersbo syd är bäst lämpad att ensam utgöra snödeponi i Gävle. Plats 1 Fredriksskans, 2 Duvbacken och 5 Kungsbäck bedöms ha potential att ensamma och/eller i kombination med annan plats utgöra snödeponi i Gävle. Resultatet visar också att plats 4 Ersbo telemast inte bedöms lämplig för anläggande av snödeponi. Framtiden kommer innebära utmaningar med exempelvis vattenbrist och ökade vatten- och energibehov. Därför bör kombinationen nya verksamheter och lösningar på sådana problem alltid övervägas. I avsnitt 6.1 diskuteras huruvida deponering av snö skulle kunna ses som en resurs istället för ett problem, och på så sätt inte bara lösa snöomhändertagandet.

The purpose of this study has been to use Birkland’s (2009) theory about crisis induced learning to see how the collective learning process has worked for the three actors Stockolms Stads Trafikkontor, Trafikverket and Stockholms länsstyrelse after the two large cases of snow falls 2012 and 2016. I found that there was a need for this study as there are very few studies done that focus on how collective learning works in collaborating organisations despite of the fact that it is an important factor for a strong crisis management capability. I have done this through both creating my own data by use of qualitative interviews and then analysing this with written material in forms of evaluations and annual reports. After applying Birkland’s (2009) theory I identify that an important factor for change to occur as a result of the necessary learning processes he has identified has been through collaboration. 2016 there was more change that happened in contrast to 2012 and the main difference was the level of collaboration as this was higher and more evolved after 2016.

The study has consisted of creating a place for snow storage with a connecting storm water facility. This is based on findings regarding concentrations of pollutants in Luleå's snow storages in combination with Luleå's standards for design of these storages. For Luleå Municipality, the stormwater issue is relevant as the number of floods will increase as Luleå expands. This results in a greater ratio of hard-made surfaces with increased surface runoff that create risks of flooding and property damage, something that will intensify even further with climate change. Besides this, the runoff concentration of pollutants that are transported out into recipients also increases. The study has been carried out in Luleå, via Luleå Municipality and LTU. The purpose of the study was to answer the following questions:"What concentrations of pollutants are found in Luleå's meltwater?", "What does Luleå' smanagement of snow storage look like, and why?", "Where can a snow storage be placed in Luleå to enable year-round recreation?” and "Which stormwater solution should be chosen to filter pollutants from this snow deposit?". This was answered via seven different means of gathering data: literature studies, field studies/observations, meetings/interviews & E-mail exchanges, selection of a stormwater facility, calculations, simulations, and conceptual design. Through these means, the study concluded that the concentrations of pollutants in meltwater are generally greater than in stormwater, that there are recommendations regarding the size, location and safety of Luleås snow storages, that any snow storage should preferably be located where motor traffic is not present and that its space should be usable year round with regard to recreation, and that a wetland is the most suitable facility for filtering the pollutants in the meltwater from this deposit. Overall, the results conveys that the spaces set aside for snow and meltwater treatment should enable year-round recreation, in addition to their technical functions. However, does the results show nothing in terms of management of extreme cases of rainfall nor any types flooding preventions relating to stormwater management. This paper does not provide any suggestions for a snow storage site nor a stormwater treatment facility for cities with a similar or different climate. The reason that onlyr ecreation and pollution treatment were considered is because these are the most relevant in this context, firstly since toxins are more prevalent in meltwater than in stormwater, and because recreation associated with snow is a given aspect of usage. Thus were a suitable frame of question and suitable means used to generate reasonable and acceptable results.