Essays about: "environmental hazard"

Showing result 16 - 20 of 57 essays containing the words environmental hazard.

  1. 16. Understanding discourses on technological interventions to tackle soil salinity : a case study from Khuzestan, Iran

    University essay from SLU/Dept. of Urban and Rural Development

    Author : Berangere Gramaccioni; [2020]
    Keywords : soil salinity; leaching; irrigation; irrigation management; technological development; critical discourse analysis;

    Abstract : Soil salinity is an environmental hazard in arid and semi-arid regions in the world, diminishing crops growth and, hence, affecting agricultural production. One scientifically accepted solution to contrast the problem is the practice of leaching, consisting in the application of an extra amount of water, in addition to that used for irrigation, which can remove salts from the root zone, washed away through drainage. READ MORE

  3. 17. Methods for Evaluating Dewatering Properties of Sewage Sludge

    University essay from Lunds universitet/Kemiteknik (CI)

    Author : Nadia Abdalla; [2019]
    Keywords : sludge dewatering; sewage sludge; laboratory scale sludge treatment; dewatering sludge; dewatering sewage sludge; CST; capillary suction time test; centrifuge; lab-centrifuge; rheology; polymers conditioning; sludge conditioning; centrifuge on lab scale; evaluation of lab experiments; CST evaluation; mechanical de-watering evaluation; sludge dewatering at lab; lab scale dewatering process; sludge dewatering methods at lab; Chemical engineering; Lab centrifuge; Capillary Suction Time CST ; Mechanical sludge dewatering evaluation; Polymers conditioning of sludge; sewage sludge dewatering; methods for sludge dewatering at lab; water engineering; environmental engineering; vattenförsörjningsteknik; avloppsteknik; Chemistry;

    Abstract : After the sewage wastewater is collected from different households and directed to the treatment plants, it goes through several processes, which are physical, chemical and biological. The different processes remove the contaminant, and produce a semi-solid material named sludge. Sludge has a huge amount of liquid. READ MORE

  4. 18. Life cycle analysis on phase change materials for thermal energy storage.

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Elin Johansson; Filip Norrman; [2019]
    Keywords : ;

    Abstract : Sustainable energy sources and utilization is a large area of interest and the developments are moving fast. Recently, thermal energy storage in the form of phase change materials other than water have caught more interest and a need of analysis for the entire life cycle of the materials have appeared. READ MORE

  5. 19. The Nordic Prediction Method For Railway Traffic Noise : Improvements of the current corrections forrailway bridges, switches and crossings

    University essay from KTH/Byggnadsmaterial

    Author : KRISTÍN HELGADÓTTIR; RAGNHEIÐUR BJÖRNSDÓTTIR; [2019]
    Keywords : The Nordic Prediction Method; Railway traffic; Railway noise; Noise measurements; Acoustics; Steel bridges; Concrete bridges; Switches; Railway crossings; Correction factor; Correction for track condition;

    Abstract : Railway noise is a very important and growing health hazard in today´s society.Railway systems pass through towns and cities and create noise. When trainsride through or over railway bridges, switches and crossings the noise increasessubstantially, causing great annoyance to the residents in the area. READ MORE

  6. 20. Impact of environmental variables on tundra vegetation onset of flowering explained by survival modelling

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Hanna Jonsson; [2019]
    Keywords : Flowering; Phenology; Cox proportional hazard model; Tundra; International tundra experiment; Climate change; Physical Geography and Ecosystem analysis; Earth and Environmental Sciences;

    Abstract : Timing of phenological events are highly related to climate and is one of the first signs of ecosystem responses to the climate change. Timing of flowering phenology is an important trait influencing the distribution and fitness of plants species. READ MORE