Search for dissertations about: "Hydropower related thesis"

Showing result 1 - 5 of 34 swedish dissertations containing the words Hydropower related thesis.

2. 1. Graphene as Solid Lubricant in Polymer Composites : With Application in Hydropower Bearings

   Author : Julian Somberg; Nazanin Emami; Jan Ukonsaari; Gil Gonçalves; Sergei Glavatskih; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Graphene; Solid Lubricant; Polymer Composite; Friction; Hydropower; Machine Elements; Maskinelement;

   Abstract : With a rising global demand for green energy production, hydropower plays a key role in securing a reliable and sustainable energy supply. Hydropower is the largest and most efficient renewable energy source, with an ever-increasing capacity. READ MORE

4. 2. Impact of hydropower regulation on river water geochemistry and hyporheic exchange

   Author : Dmytro Siergieiev; Hjalmar Laudon; Luleå tekniska universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; regulated river; hyporheic zone; hydraulic conductivity; clogging layer; Applied Geology; Tillämpad geologi;

   Abstract : Hydropower regulation of rivers exhibits a threat to the riverine ecosystems. Fragmentation of flow, landscape disturbances, and water retention are key features of regulated catchments, resulting in reduced floods and geochemical tr¬ansport, non-natural water level fluctuations, and thus disturbed exchange between the river and the aquifer. READ MORE

5. 3. Greenhouse gas emission from tropical reservoirs : Spatial and temporal dynamics

   Author : Annika Linkhorst; Sebastian Sobek; Frédéric Guérin; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; methane; carbon dioxide; climate; carbon cycle; lake; limnology; inland water;

   Abstract : The emission of methane (CH4) and carbon dioxide (CO2) from reservoirs has been estimated to make up for about 1.3% of the global anthropogenic greenhouse gas emission. The impoundment of a river leads to the accumulation of sediment that is brought in from inflowing rivers, and the sediment organic matter is degraded to CH4 and CO2. READ MORE

6. 4. Environmental considerations in the planning of large dam projects : a study on Environmental Impact Statements and the Southeastern Anatolia Project

   Author : Anna Brismar; Jan-Olof Lundqvist; Linköpings universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Atatürk Dam. EIA; ecosystem services; environmental impact; Euphrates River; GAP; hydropower; river system; sustainable development; Tigris River; Turkey; Dammar; Miljöaspekter; Tigris; Turkiet; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

   Abstract : Large dam projects have played a key role in supporting societal development in the past and continue to be launched, primarily in developing countries. However, large dam projects also cause extensive environmental impacts in the river system, which may reduce the river system's capacity to provide goods, services, and other values apart from those generated by the project. READ MORE

7. 5. Mobilization of metals from mining wastes and the resuspension of contaminated sediments

   Author : Lan Thuy Nguyen; Bo Svensson; Gunnar Jacks; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Acid Rock Drainage; hydropower plant; metal contamination; mining wastes; storm-wind; resuspension; sediment; Environmental chemistry; Miljökemi;

   Abstract : In some environmental situations, environmental effects caused by elevated metals resulting from past mining and smelting activities can be observed in nearby receiving water bodies several decades after mine and smelter closure. There is a growing need for managing the hazardous solid wastes such as mining wastes as well as for assessing water quality and for sustainable management of sediment quality. READ MORE