Sökning: "Actual evapotranspiration"

Hittade 5 avhandlingar innehållade orden Actual evapotranspiration.

  1. 1. Changes of evapotranspiration and water cycle in China during the past decades

    Författare :Ge Gao; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Potential evapotranspiration; Actual evapotranspiration; Spatial and temporal characteristic; Trend; Controlling factors; Water cycle; Thornthwaite water balance; China;

    Sammanfattning : Evapotranspiration is the second largest quantity in the water cycle and an important indicator for climate changes. Accurate estimations and better understanding of evapotranspiration are required in hydrologic studies and water resources modelling under stationary and changing climate conditions. LÄS MER

  3. 2. Modelling water resources despite data limitations in Tanzania’s Kilombero Valley

    Författare :William Senkondo; Steve W. Lyon; Chong-Yu Xu; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hydrological modelling; Recession analysis; Remote sensing; Water resources; Evapotranspiration; Transmissivity; SWAT model; Kilombero Valley; Physical Geography; naturgeografi;

    Sammanfattning : Water is a vital resource for survival on the Earth. Sustainable management of water resources is therefore required for the wellbeing of present and future generations. A cornerstone of water resources management is scientific guidance supported by relevant data (in terms of quantity and quality). LÄS MER

  4. 3. Land Use and Cover or Precipitation? : Changes on Hydrological Response of the Upper Paraná River Basin

    Författare :Sameh Adib Abou Rafee; Avdelningen för Teknisk vattenresurslära; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The Upper Paraná River Basin (UPRB) has undergone extensive Land Use and Cover Changes (LUCC) in thelatest decades, due to rapid population growth and economic development. Furthermore, variation in precipitationpatterns was observed across the basin mainly after the 1970s Climate shift. LÄS MER

  5. 4. Forests and Water - Friends or Foes? : Hydrological implications of deforestation and land degradation in semi-arid Tanzania

    Författare :Klas Sandström; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Water in nature and society; Vatten i natur och samhälle;

    Sammanfattning : This is a study of landscape hydrology; a type of hydrology which focuses on large sca1e implications of hydrologica1 processes as a function of hydroclimate, surface and sub-surface land properties, and the effect of human activities. The focus of the thesis is groundwater recharge and dry season flow following deforestation and land degradation. LÄS MER

  7. 5. Dry spell mitigation to upgrade semi-arid rainfed agriculture : Water harvesting and soil nutrient management for smallholder maize cultivation in Machakos, Kenya

    Författare :Jennie Barron; Carl Folke; Theib Oweis; Stockholms universitet; []
    Nyckelord :;

    Sammanfattning : Improvements in on-farm water and soil fertility management through water harvesting may prove key to up-grade smallholder farming systems in dry sub-humid and semi-arid sub-Sahara Africa (SSA). The currently experienced yield levels are usually less than 1 t ha-1, i.e. LÄS MER