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Identifiering av problem samt förslag på åtgärder
… In the Santiago region the air is seriously contaminated and most of the rivers are classified as heavily polluted. The aim of this thesis is to survey the industrial fluid waste situation in the Santiago region and to make suggestions on technological improvements or process …
I have done a follow up study of the restoration of two rivers, Röälven and Grundan, in order to evaluate the effects of the restoration on the endemic population of trout. Both rivers have been used for timber floating during many years throughout the 20th century, and because …
… of spawning and growing habitats caused by logging activities in many swedish rivers. The knowledge of the spawning migration and the habitat use of the seatrouts and salmon are limited. This study analyse the upstream spawning migration of Atlantic salmon and sea-running brown …
… The large contribution of nutrients to the Sea is caused by emission from the rivers within the drainage basin. For the total emission of nutrient into the Sea the retention process in the rivers has big influence. This process in the river system has been assumed as a not …
… give rise to precipitation in Sweden, which will cause more floods in Swedish rivers. Many of the Swedish rivers are regulated and have lots of hydro-electro power plants. Higher floods in the rivers will give greater water loads on the dams, which mean that a higher discharge …
undersökning av fosforhalter
… works is approximately 9 kg per year. 2. Does Lerbodaälven differ from other rivers nearby? Water samples from ten other rivers close to Lerbodaälven have been collected and analysed two times during the spring 2010: one time during high water flow and one time during normal …
… results and the nitrogen levels are still the same. Data from small forest rivers and small rivers in agriculture land are showing a much more clear result. Agriculture land is in these measurements showing a slightly decrease in nitrogen levels. Forrest rivers are on the other …
… and public opinions, I have noticed a common interest to turn this riverside into an outdoor recreation area. Its centralized location makes it accessible for inhabitants, allowing for the increased involvement of this open space in their daily lives. My approach is to create …
… (BOD = biological oxygen demand) and should not be led out directly into rivers or lakes because the retting products that are still left in the water will be degraded by microorganisms, who use oxygen and make the water free from oxygen if there is too much degradable material …
Regulation of rivers by dams and reservoirs is a good example where anthropogenic impact could be considerable both in the local environment, but also has major implications upstream and downstream. This study was accomplished as a literature study of the river Nile, which is …
en analys av orsaker och effekter
… the lake as the bird paradise it once was. A variability study of the ditches, rivers and lakes is also made based on paper maps from 1869, 1934, 1974 and 1997, in showing the changes that have been done. The length of the streams doubled between 1869 and 1975, but then …
en metodstudie i föroreningsmodellering
… called ”KadmiumKalkylatorn” has been performed to model cadmium pollution in rivers in Skåne, Sweden. The water runoff has been multiplied with cadmium standard concentrations based on membership in landuse classes. The result is based on, and reported for, watersheds and river …
… have been thought to be the main contributors to elevated nitrogen levels in rivers and lakes. The amount of nitrogen that leaches depends on the fraction of the total nitrogen in the soil that consists of nitrate, since nitrate is easily transported through the soil. Nitrogen …
… The GIS input data consist of maps with soil type, land-use, lakes, rivers and a digital elevation model. The model is a hybrid between a conceptual and a physical model. The snow routine uses the degree-day method, the evapotranspiration routine uses the Blainey-Criddle …
… by Mälarenergi Vattenkraft AB. The total system consists of 4 different main rivers with 24 hydropower stations and several dams. The total installed power in the system is 43.75 MW. Most of the hydropower stations are regarded as small scale hydropower stations and thus …
