Indeks vlažnosti tal Pomurja: primer uporabe podatkov satelita Landsat 8
Povzetek
V prispevku obravnavamo uporabo metode računanja vlažnosti tal s satelitskimi podobami na primeru Pomurja. Predstavljen indeks vlažnosti tal je derivat temperature površja in vegetacijskega indeksa NDVI, pri tem so uporabljeni spektralni pasovi, zaznani z optičnim in termičnim senzorjem satelita Landsat 8. Dobljene vrednosti indeksa vlažnosti tal zavzemajo vrednosti med 0 (nizka vlažnost tal) in 1 (visoka vlažnost tal). V nadaljevanju preverjamo razlike v vlažnosti tal gleda na intenzivno ali bolj ekstenzivno kmetijsko rabo. Izračunane ocene vlažnosti tal v Pomurju se gibljejo med 0,06–0,99, pri tem se pojavljajo statistično signifikantne razlike med višjimi vrednostmi v gozdovih ter nižjimi vrednostmi na njivah in drugih izbranih zemljiških kategorijah. Tovrstni pristop k oceni vlažnosti tal je uporaben za monitoring in načrtovanje kmetijskih in okoljevarstvenih dejavnosti na regionalni ravni hkrati pa omogoča prognozo vpliva podnebnih sprememb na vlažnostne razmere v danem prostoru.
Prenosi
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