Sökning: "drainage network"

Visar resultat 21 - 25 av 39 uppsatser innehållade orden drainage network.

  1. 21. Forest drainage effects on tree growth in Northern Sweden : developing guidelines for ditch network maintenance

    Master-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Hanna Glöd; [2018]
    Nyckelord :ditch cleaning; ditch network maintenance; drainage effect; forest drainage; indicators; dikningseffekt; dikesrensning; dikesunderhåll; indikatorer; skogsdikning;

    Sammanfattning : At present, there are no clear guidelines for when and where ditch network maintenance (DNM) should be performed in Sweden. Recently there have been attempts to create tools that indicate the need for DNM, one of these tools is the Ditch Flow Tracker (DFT). LÄS MER

  3. 22. Watershed delineation for runoff estimations to culverts in the Swedish road network : a comparison between two GIS based hydrological modelling methods and a manually delineated watershed

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Iris Behrens; [2017]
    Nyckelord :GIS; hydrological modelling; watershed: single flow direction algorithm; multiple flow direction algorithm; climate change adaption; Earth and Environmental Sciences;

    Sammanfattning : The anticipated climate changes are predicted to alter the precipitation patterns in Sweden. Increased episodes of intense short-duration rainfall and higher intensities of day long-duration rainfall are expected. Road sections are often a target of flooding, causing impassable roads, due to the lack of capacity of drainage systems. LÄS MER

  4. 23. Vägskador och sprickor på det statliga vägnätet : En förstudie om beläggningsskadors typ, omfattning och orsaker

    M1-uppsats, KTH/Byggteknik och design

    Författare :Semunegus Kassahun; Vincent Rivethorne; [2017]
    Nyckelord :;

    Sammanfattning : Idag finns det behov av mer kunskap om vilka skador på vägarna som leder till underhållsåtgärder. En bättre förståelse för orsakerna för att minimera behovet av underhåll genom rätt dimensionering av vägar och optimerade underhållsstrategier. LÄS MER

  5. 24. A case study of runoff coefficients for urban areas with different drainage systems

    Master-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Christine Thomas; [2017]
    Nyckelord :1D Hydraulic modelling; avloppsteknik; environmental engineering; stormwater; vattenförsörjningsteknik; water Engineering; Runoff Modelling; SuDS; Urban Runoff; Effective Impervious Area; Technology and Engineering;

    Sammanfattning : According to the United Nations, half of humanity now lives in cities. In recent years, many countries have seen a rise in the number of and intensity of heavy rainfall events due to the effects of climate change. The consequences of urban flooding in such a context can vary between just causing mild discomfort to tremendous devastation. LÄS MER

  7. 25. Hydrological modeling enhancement using GIS : An improved topographic wetness index for wetland detection

    Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Patricia Rull; [2016]
    Nyckelord :Blue spots; digital dams; culverts; hydrologically enforced DEM; topographic wetness index; TWI; soil-topographic wetness index; STI; wetland detection;

    Sammanfattning : Hydrological modeling, like runoff modelling for flood prevention, is based on digital elevation models (DEMs). The fact that the DEMs do not represent existing road culverts can lead to considerable hydrological misinterpretations. LÄS MER