Essays about: "drought propagation"

Found 5 essays containing the words drought propagation.

  1. 1. Exploring patterns in risk factors for bark beetle attack during outbreaks triggered by drought stress with harvester data on attacked trees: A case study in Southeastern Sweden

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Nikolaos Kouskoulis; [2023]
    Keywords : Geography; GIS; Geographic Information Science; Forest ecosystems; Bark beetle outbreak; Southeastern Sweden; Predisposing factors; Triggering factors; Drought stress; Earth and Environmental Sciences;

    Abstract : ABSTRACT Raising temperatures and climate variability have intensified extreme weather events worldwide. These extremes can enhance and trigger possible pest outbreaks. Bark beetle attacks have become a major concern in regions with extensive spruce forest areas. Southeastern Sweden has faced repeated outbreaks resulting in widespread tree loss. READ MORE

  3. 2. Influence of forest mires on wildfire : a landscape analysis of the 2014 Västmanland forest fire

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Andreas Souropetsis; [2022]
    Keywords : Forest fire; Mires fuel composition; Aerial photo interpretation;

    Abstract : Forest fire is a major natural disturbance that influence forest ecosystem structure and composition at both the stand and landscape level. In boreal Fennoscandia fire frequency has been very low over the last c.150 years due to effective fire suppression, although occasionally high-intensity fires escape initial attack and grow big. READ MORE

  4. 3. HYDROLOGICAL DROUGHTS IN SWEDEN: Mapping of historical droughts and identificationof primary driving climate variables andcatchment properties

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Hugo Rudebeck; [2018]
    Keywords : hydrological droughts; drought propagation; drought indices; SSI; threshold index; SPI; catchment properties and drought events; hydrologisk torka; propagering av torrperioder; torkindex; SSI; tröskelvärdes index; SPI; avrinningsområdesegenskaper och torrperioder;

    Abstract : This study investigated the relationship between hydrological, and to some extent, meteorological droughts, and meteorological variables and catchment characteristics in 235 Swedish catchments between 1983 and 2013. This was done in order to investigate what factors affect the drought sensitivity in Swedish catchments and to map the occurrence of droughts in Sweden between 1983 and 2013. READ MORE

  5. 4. The effects of trinexapac-ethyl on Pinus sylvestris and Picea abies

    University essay from SLU/Department of Plant Biology (from 140101)

    Author : Emil Bengtsson; [2018]
    Keywords : GA; gibberellin; Norway spruce; PGR; phytohormone; Picea abies; Pinus sylvestris; plant growth regulator; Scots pine; trinexapac-ethyl;

    Abstract : The use of so-called micro-plant propagation have become a well-adapted cultivation technique in Swedish forestry nurseries. Although this production method has many advantages, a commonly occurring problem is that the young plants, after trans- plantation in the nursery, have an underdeveloped root system when the shoot part have reached desired length. READ MORE

  6. 5. BIOGAS DEVELOPMENT SCENARIOS TOWARDS 2020 IN RWANDA: The contribution to the energy sector and socio-economic and environmental impacts

    University essay from Akademin för teknik och miljö

    Author : JEAN DE LA CROIX SINARUGULIYE; JEAN BAPTISTE HATEGEKIMANA; [2013]
    Keywords : Anaerobic digestion; biogas; biomass; dissemination; scenario;

    Abstract : Access to modern energy is essential to achieve sustainable development and poverty reduction. However, with about 321 kWh per capita, Rwanda is ranked among the countries that have a lower consumption of primary energy in the world. READ MORE