Sökning: "pollutant transport"

Visar resultat 6 - 10 av 52 avhandlingar innehållade orden pollutant transport.

1. 6. Long-term development, modeling and management of nutrient loading to inland and coastal waters

   Författare :Amelie Darracq; Georgia Destouni; Andrea Rinaldo; Stockholms universitet; []
   Nyckelord :Nutrients; catchments; environmental management; climate change; population and lifestyle development; subsurface-surface water interactions; long-term simulations; nutrient retention; modeling; hydrology; transport processes; biogeochemistry; scaling; transport and reaction rates; Physical Geography; geografi med naturgeografisk inriktning;

   Sammanfattning : Environmental and water system protection and restoration require accurate knowledge and quantification of waterborne pollutant transport, retention-release and transformation processes taking place in the subsurface, river, lake and sea water systems, and at the interfaces between these systems. This thesis investigates the importance of spatial model resolution for such quantification and the possible long-term nutrient load development under different human perturbations and nutrient source management scenarios in the Swedish Norrström drainage basin, based on simulations with the GIS-based dynamic nutrient transport-attenuation model POLFLOW. LÄS MER

3. 7. Roadblocks to Implement Electric Freight Transports : Challenges for Commercial Vehicle Manufacturers and Hauliers

   Författare :Jorge Gutiérrez Chiriboga; Magnus Blinge; Maria Huge-Brodin; Uni Sallnäs; Lisa Govik; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The freight transport industry is crucial for the global economy and a key element of all supply chains and logistics systems. The demand for freight is expected to more than double over the next three decades. Freight transport’s externalities and negative impact on the environment have been highlighted in previous research and reports. LÄS MER

4. 8. Simulating water and pollutant transport in bark, charcoal and sand filters for greywater treatment

   Författare :Susanna Ciuk Karlsson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : A septic tank combined with a sand filter is the most common onsite wastewater treatment system worldwide, since it is a simple, lowcost and reliable treatment method. Alternatives to sand in filters could be advantageous in terms of availability of material and enhanced treatment properties. LÄS MER

5. 9. Water in roads: Flow paths and pollutant spread

   Författare :Hedi Rasul; B. Olofsson; Helen Kristine French; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; De-icing salt; Road; Tracer test; ERT; Water content; Road pollutants; Flow pathways; Land and Water Resources Engineering; Mark- och vattenteknik;

   Sammanfattning : For better road construction and maintenance while minimising damage to the environment and groundwater, it is essential to monitor and model hydrological impacts on roads and consider pollution of groundwater. Water content in unbound material in road layers changes continuously and water flow usually occurs along pathways that are the main corridors for pollutant spread to groundwater. LÄS MER

7. 10. Evaluating the transport and composition of gully pot sediments : Under changing anthropogenic activities and rainfall regimes

   Författare :Haoyu Wei; Lian Lundy; Maria Viklander; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; VA-teknik; Urban Water Engineering; Centre - Centre for Stormwater Management DRIZZLE ; Centrumbildning - Centrum för dagvattenhantering DRIZZLE ;

   Sammanfattning : Gully pots are a fundamental runoff quality and quantity control measure installed in urban catchments around the world. However, their ubiquitous use in urban catchments also incurs a substantial resource demand in terms of routine maintenance if their continuous performance is to be assured. LÄS MER