Quantitative Assessment of the Nitrogen Fixation by Forest Vegetation in the Nagara River Basin Using Landsat TM Data

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Other Title
  • ランドサットＴＭデータを用いた長良川流域における森林の窒素吸収機能の定量的評価

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Description

An approach to use satellite data for quantitative estimation of the fixation of nitrogen by different vegetation types over river basin ecosystems was proposed and applied to a mountainous area located in the upper reach of Nagara river basin (Gifu Prefecture, Japan) covered predominantly with multiple vegetation types. In addition to satellite data, this approach also involved the use of census data, statistics data and previous results available in literature as supporting materials. With this approach, the annual amounts of nitrogen absorbed by different categories of forest vegetation classified in terms of species and ages using the satellite data were estimated. Validation tests were performed by comparing the satellite data-based estimations (Ndsatellite) with estimations from a budget model (Ndmodel) and statistics data (Ndrecord), respectively. It was found that the estimated NdsatelliteN (100.8-111.7kg ha-1y-1 for broadleaved forest, 35.4-71.4kg ha-1y-1 for evergreen coniferous forest, 91.4kg ha-1y-1 for mixed forest) coincided well with the values of Ndmodel (96.0-100.4kg ha-1y-1 for broadleaved forest, 48.0-74.0kg ha-1y-1 for evergreen coniferous forest, 82.3kg ha-1y-1 for mixed forest) and were somewhat larger than those of Ndrecord although the values of Ndsatellite and Ndrecord were all in the same order of magnitude for respective vegetation types classified.

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Details 詳細情報について

  • CRID
    1390282679054031872
  • NII Article ID
    130004372195
  • DOI
    10.4287/jsprs.42.2_12
  • ISSN
    18839061
    02855844
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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