Grundprinzipien des dreidimensionalen analytischen Strahlungstransportmodells ESRT und dessen Anwendung bei der Simulation spektraler Kroneneigenschaften heterogener Wälder

  • role: First author第一作者
  • Affiliation:

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

    Key Laboratory of Forestry Remote Sensing and Information System, National Forestry and Grassland Administration, Beijing 100091, China

  • Email:xiaoyaoli@ifrit.ac.cn
  • Introduction:李骁尧,研究方向为林业遥感机理建模与应用。E-mail: xiaoyaoli@ifrit.ac.cn
LI Xiaoyao12,  
  • Affiliation:

    Northwest Surveying and Planning Institute of National Forestry and Grassland Administration, Xi'an 710048, China

    Key Laboratory of National Forestry and Grassland Administration on Ecological Hydrology and Disaster Prevention in Arid Regions, National Forestry and Grassland Administration, Xi'an 710048, China

RAO Yueming34,  
  • Affiliation:

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

ZHANG Zhuoli1,  
  • Affiliation:

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

WEI Shengrong1,  
  • Affiliation:

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

QIN Pengyao1,  
  • role: Corresponding author通信作者
  • Affiliation:

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

    Key Laboratory of Forestry Remote Sensing and Information System, National Forestry and Grassland Administration, Beijing 100091, China

  • Email:tan@caf.ac.cn
  • Introduction:谭炳香,研究方向为森林资源遥感监测、森林信息遥感提取。E-mail: tan@caf.ac.cn
TAN Bingxiang12*,  
  • Affiliation:

    Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

FU Liyong1

Resümee

Die komplexe räumliche Heterogenität in Waldszenen beeinflusst die Reflektionseigenschaften des Kronendachs, und der Umgang mit Heterogenitätsproblemen stellt eine Herausforderung im Bereich der Strahlungstransportmodellierung dar. Um die Genauigkeitsbeschränkungen klassischer analytischer Modelle aufgrund von Szenenvereinfachungen sowie die Effizienzbeschränkungen computergestützter Simulationsmodelle bei der Simulation großer Szenen zu überwinden, haben wir basierend auf der Theorie des stochastischen Strahlungstransports das dreidimensionale analytische Strahlungstransportmodell ESRT entwickelt. Die Anwendung des ESRT-Modells in verschiedenen komplexen Waldszenarien muss jedoch noch weiter erforscht werden und erfordert mehr Felddaten zur Validierung und Bewertung des Modells. Dieser Artikel stellt die Grundprinzipien des ESRT-Modells sowie Eingabe- und Ausgabeparameter vor und untersucht basierend auf Daten von 21 Mischwald-Stichprobenflächen und 50 durch Schädlinge belasteten Stichprobenflächen die Fähigkeit des Modells, unterschiedliche spektrale Kroneneigenschaften heterogener Wälder zu simulieren, und analysiert den Einfluss von Mischwaldanteil und Schädlingsbefall auf die Kronenspektren. Die Ergebnisse zeigen, dass das erweiterte ESRT-Modell im Vergleich zum ursprünglichen SRT-Modell eine bessere Übereinstimmung zwischen simulierten Kronenspektren von Mischwäldern und schädlingsbelasteten Waldparzellen und den vor Ort gemessenen Spektren aufweist; die Simulationsgenauigkeit nähert sich der von dreidimensionalen Computermodellen an; das Verhältnis von Nadel- zu Laubbäumen sowie die vertikale Verteilung geschädigter Blätter beeinflussen das Kronenspektralsignal. Das ESRT-Modell bietet einen Rahmen für die Strahlungstransportsimulation in verschiedenen heterogenen Waldszenarien, der die Simulationsgenauigkeit dreidimensionaler Modelle mit der Effizienz klassischer analytischer Modelle ausgleicht und besser für großmaßstäbliche Simulationen komplexer Waldstrukturen geeignet ist. Die Studie kann eine theoretische Grundlage für Monitoring-Anwendungen komplexer Waldszenarien mit dem ESRT-Modell bieten.

Schlüsselwort

Fernerkundung;Strahlungstransport;dreidimensionales analytisches Modell;heterogene Waldkronen;Mischwälder;Waldschäden durch Schädlinge

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