Sökning: "älven"
Visar resultat 1 - 5 av 61 uppsatser innehållade ordet älven.
1. Kvillebäcken : analys och gestaltningsförslag - me[d]andra strukturer och processer
Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Urban and Rural DevelopmentSammanfattning : I byggandet av hållbara städer är utveckling av blågrön infrastruktur högaktuell, och inom detta faller stort fokus på utveckling av urbana vattendrags ekologi, vattenkvalitet, och förmåga att omhänderta konsekvenser av klimatförändringar. Få vattendrag uppnår miljökvalitetsnormerna, och platsspecifika utmaningar finns i varje vattendrag. LÄS MER
2. Effects of summer peaks on brown trout and Atlantic salmon growth and survival in hydropower-regulated Gullspång River
Kandidat-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)Sammanfattning : Daily demands for electrical power are met through sub-daily release of turbined water in the form of hydropeaking. Hydropeaking’s changes to stream flow are listed as a threat to biodiversity in river ecosystems as it causes rapid habitat alteration such as increased depth and velocity, affecting the species living downstream. LÄS MER
3. “It was a free and healthy job” : timber floating on the river Ångermanälven in the 20th century
Master-uppsats, SLU/Dept. of Forest Ecology and ManagementSammanfattning : The exploitation of northern Sweden's forests began in about the 1830s and continued expanding northwards over the following decades. A key factor that enabling the exploitation of these forests was the natural infrastructure, such as the network of rivers, creeks and flooding during the summer, which made it possible to float timber from the forests to the sawmills on the coast. LÄS MER
4. Miljöåtgärders påverkan på vattenkraftens elproduktion och reglerförmåga
Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : Hydropower is predicted to have a continued significant role in the future energy system thanks to itsfossil-free electricity production and ability to regulate production according to demand. However,there is a conflict between hydropower plants and the surrounding ecosystems. LÄS MER
5. The end of the timber frontier in northern Sweden : early logging, natural forests and the frontier concept
Master-uppsats, SLU/Dept. of Forest Ecology and ManagementSammanfattning : The Fennoscandian forests experienced drastic changes in the 19th century. The high demand for timber during the European industrialization pushed the timber companies towards increasingly remote forest landscapes for resource extraction. LÄS MER
