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    Wyświetlanie 1-4 z 4
    Tytuł:
    Współczesne teledetekcyjne metody inwentaryzacji stanu lasu po huraganie
    Autorzy:
    Mozgawa, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1023546.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    szkody w lesie
    metody badan
    szkody huraganowe
    lasy
    teledetekcja satelitarna
    lesnictwo
    inwentaryzacja szkod
    system IACS
    remote sensing
    aerial photography
    high−resolution satellite imagery
    inventory of forest damage
    windstorm
    iacs system
    Opis:
    Forest areas suffering acute damage from wind storms can be successfully monitored by applying remote sensing techniques using special panchromatic aerial photography and available traditional colour satellite imagery with a terrestrial resolution not less than 5 m. Orthophotomaps and satellite images collected for the needs of the IACS system provide important information about forest damage caused by heavy storms. It is essential to create spatial information system for the efficient collection, processing and access to spatial environment and forest−related information about areas affected by the disaster.
    Źródło:
    Sylwan; 2004, 148, 02; 52-60
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Warunki meteorologiczne powstania szkód wiatrowych w dniach 11-12 sierpnia 2017 roku w lasach środkowo-zachodniej Polski
    Meteorological conditions of the occurrence of wind damage on August 11-12, 2017 in the forests of central-western Poland
    Autorzy:
    Chojnacka-Ożga, L.
    Ożga, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/986621.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy
    szkody w lesie
    szkody od wiatru
    warunki meteorologiczne
    wiatry
    Polska Srodkowo-Zachodnia
    mesoscale convective system
    wind gust
    forest damage
    Opis:
    Climate change, which was particularly marked at the turn of the 20th and 21st centuries, was accompanied by unfavourable weather phenomena. One of whose effects cannot be prevented is hurricane. Much of the most devastating storms (e.g. Kyrill in January 2007, Carmen in November 2010), which crossed over Poland, was associated with low pressure systems. The occurrence of high wind speeds in the cold season is a natural feature of Polish climate. Hurricanes in the summer are generally characterized by more complicated origin. The cause of the damage at this time of year may be squall fronts and tornados (e.g. July 4th, 2002 – Puszcza Piska; July 20th, 2007 – Częstochowa region). An important issue is to develop a category of winds for the forest district, which can have destructive effect on the stands. Current research shows that gusty winds exceeding 11 m/s may cause first damage to the trees, while blows with velocity exceeding 30 m/s result in severe damage. Knowing and monitoring the mechanisms that leads to strong winds, assessing their impact, and managing risk in the context of their effects is one of the important elements of a forest management strategy. On August 11th, 2017, after the influx of hot tropic air, much cooler polar air began to flow from the west. In the afternoon and evening storm cell and supercell began to form in the south−west of the country. Later on, they moved in the north direction forming a squall line. With a Mesoscale Convective System (MCS) moving to the north, there was a gusty wind exceeding 40 m/s in some places. A gust of wind occurred around 18.30 (EET) in Dolny Śląsk (SW Poland) and after about 2 hours in Pomerania (N Poland). The pressure tendency during the transition reached 4−5 hPa. In the northern part of the country, gusts of wind were the largest and occurred several times in 2−3 hours. The system was accompanied by heavy precipitations, which in north Poland determine more than 60% of the average monthly rainfall. The effect of moving MCS was the damage of almost 80 thousand hectares of forests in Poland, which of more than 39 thousand hectares were classified to complete restoration.
    Źródło:
    Sylwan; 2018, 162, 03; 200-208
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Szacowanie szkód spowodowanych przez wiatr w drzewostanach przy wykorzystaniu zobrazowań satelitarnych i danych Systemu Informatycznego Lasów Państwowych
    Estimating the damage caused by the wind in the forest stands using satellite imagery and data from the State Forests Information System
    Autorzy:
    Ciesielski, M.
    Bałazy, R.
    Hycza, T.
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/989566.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy
    huragany
    szkody w lesie
    szkody od wiatru
    szacowanie szkod
    wiatrolomy
    wiatrowaly
    drzewa nieuszkodzone
    drzewa uszkodzone
    miazszosc drzew
    drzewostany uszkodzone
    wielkosc powierzchni uszkodzonej
    obrazy satelitarne
    System Informatyczny Lasow Panstwowych
    windthrows
    remote sensing
    satellite imagery
    state forests information system database
    growth model
    Opis:
    The aim of the study was to evaluate the area and volume of the windthrows caused by a downburst, which occurred early morning on July 8th , 2015 in the Międzylesie Forest District (south−western Poland). The wind velocity reached 270 km/h and the phenomenon caused damages similar to those observed after the hurricane. The most affected forest ranges included: Różanka, Nowa Wieś, Lesica, Goworów, Jodłów and Smreczyna. To evaluate the area of the windthrow in particular forest stands, the remote sensing data were used, whereas to estimate the total wood volume we applied the growth model and the average volume of the particular forest stands, gathered in the State Forests Information System (SILP) database. The volume of the windthrow evaluated by the forest rangers during some local investigation equaled 103 thousands m³, while one calculated using the SILP database – 161 thousands m³ and with the growth model – 168 thousands m³. The forest service estimations were underestimated. According to the model of the wind damage risk, most of the forest stands in the Międzylesie Forest District were highly or very highly endangered by the strong winds. The presence of the windtrhow is very dangerous either for people or the surrounding forest (due to the risk of pests outbreak). Therefore it demands immediate decisions and actions from the forest service, which need reliable and quickly accessible data. The information provided with the satellite imagery, the risk model and the growth model may accelerate the decision−making process and optimize the damage disposal. Satellite imagery also enables to estimate the amount of damage on the areas, which are hardly available for the foresters and their vehicles. Due to their high usefulness, growing availability and declining prices, these tools should be introduced to local forestry as quickly as possible.
    Źródło:
    Sylwan; 2016, 160, 05; 371-377
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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