Sökning: "semi arid"

Visar resultat 11 - 15 av 45 avhandlingar innehållade orden semi arid.

  1. 11. Vegetation dynamics in relation to livestock grazing in a semi-arid steppe in inner Mongolia

    Författare :Wei Zhang; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  3. 12. Land-use and land-cover dynamics and rural livelihood perspectives, in the semi-arid areas of Central Rift Valley of Ethiopia

    Författare :Efrem Garedew; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Global environmental changes in climate, land-use and bio-diversity are increasingly on top of scientific and political agenda. The impacts of climate change are manifested on all dimensions of food security: availability, accessibility, utilization and stability. LÄS MER

  4. 13. Impacts of land use change on river streamflow and water quality in a semi-arid catchment : assessment of a catchment under rapid and uncontrolled urbanisation

    Författare :Benjamin Gossweiler; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : The ongoing degradation of water quality and streamflow in rivers and streams worldwide is mainly due to human action through global land use change, particularly urbanisation. Population growth and economic development are major drivers of urbanisation, which causes environmental problems such as high water demand and solid waste and wastewater generation. LÄS MER

  5. 14. Sustainability of irrigated agriculture under salinity pressure – A study in semiarid Tunisia

    Författare :Fethi Bouksila; Avdelningen för Teknisk vattenresurslära; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : In semiarid and arid Tunisia, water quality and agricultural practices are the major contributing factors to the degradation of soil resources threatening the sustainability of irrigation systems and agricultural productivity. Nowadays, about 50% of the total irrigated areas in Tunisia are considered at high risk for salinization. LÄS MER

  7. 15. Urban Origins in Southern Sri Lanka

    Författare :Raj Somadeva; Paul Sinclair; Sunil Gupta; Uppsala universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Archaeology; Archaeology; Sri Lanka; Kirindi Oya; urbanism; ceramics; beads; historical archaeology; settlement archaeology; inscriptions; Land Unit classification; satellite image; Arkeologi; Archaeology subjects; Arkeologiämnen; arkeologi; Archaeology;

    Sammanfattning : This study focuses upon the development of urbanisation in southern Sri Lanka during the proto, early and late historical periods c. 900 BC onwards. The following research themes are addressed:(a). Why did the southern semi-arid zone become a focus of urbanism?(b). LÄS MER