Sökning: "change and release management"

Visar resultat 1 - 5 av 24 avhandlingar innehållade orden change and release management.

1. 1. Casting for Knowledge and Landing Understanding : Exploring the management of Swedish recreational fisheries as social-ecological systems

   Författare :Samuel Blyth; Patrik Rönnbäck; Malgorzata Blicharska; Stian Stensland; Shannon D. Bower; Anssi Vainikka; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Recreational Fisheries; Fisheries Management; Catch Release; Social-ecological System; Angler Behaviour; Fish Behaviour; Fish Welfare; Stakeholder Engagement; Natural Resources and Sustainable Development; Naturresurser och hållbar utveckling;

   Sammanfattning : The successful management of recreational fisheries must balance ecological, and social goals; select from and implement a range of management tools; operate under often complex governance structures; and contend with diverse human stakeholders’ expectations, desires, and actual behaviour in response to management activities. This complexity also means that there are many knowledge and research gaps regarding the information needed to meet the requirements of specific fisheries. LÄS MER

3. 2. 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

4. 3. Navigating towards environmental impact assessment of shipping

   Författare :Anna Lunde Hermansson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; DAPSIR; scrubbers; metals; polycyclic aromatic hydrocarbons; marine environment; ship pollution;

   Sammanfattning : The shipping sector exert multiple pressures on the environment, affecting climate change, human health and the marine environment. From a policy perspective, shipping is usually assessed based on the emissions to air (e.g. LÄS MER

5. 4. On direct hydrogen fuel cell vehicles : modelling and demonstration

   Författare :Kristina Haraldsson; Per Alvfors; Dougal J. Nelson; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical engineering; direct hydrogen; Proton Exchange Membrane; PEM; fuel cell; fuel cell vehicle; fuel cell hybrid vehicles; on-board hydrogen storage; Kemiteknik; Chemical engineering; Kemiteknik;

   Sammanfattning : In this thesis, direct hydrogen Proton Exchange Membrane (PEM) fuel cell systems in vehicles are investigated through modelling, field tests and public acceptance surveys. A computer model of a 50 kW PEM fuel cell system was developed. The fuel cell system efficiency is approximately 50% between 10 and 45% of the rated power. LÄS MER

7. 5. Ecosystems in the Anthropocene: the role of cropland management for carbon and nitrogen cycle processes

   Författare :Stefan Olin; Institutionen för naturgeografi och ekosystemvetenskap; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Carbon; Nitrogen; DVM; Ecosystem modelling; Cropland; Management; Yields;

   Sammanfattning : Through deforestation and conversion of natural ecosystems to croplands and pastures, have humans released vast amounts of carbon (C) dioxide (CO2) into the atmosphere. Roughly one third of the cumulative anthropogenic emissions until today stem from these practices, the remainder being mostly due to fossil fuel combustion. LÄS MER