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林业资源管理 ›› 2023, Vol. 0 ›› Issue (2): 104-110.doi: 10.13466/j.cnki.lyzygl.2023.02.014

• 技术应用 • 上一篇    下一篇

基于高分遥感数据的阿尔泰山乔木林地上生物量预测

张绘芳(), 朱雅丽, 张景路, 高健, 地力夏提·包尔汉   

  1. 新疆林业科学院现代林业研究所,乌鲁木齐 830000
  • 收稿日期:2023-02-20 修回日期:2023-04-24 出版日期:2023-04-28 发布日期:2023-06-26
  • 作者简介:张绘芳(1980-),女,陕西大荔人,研究员,硕士,主要从事森林资源监测与遥感技术应用等方面的研究工作。Email:396930128@qq.com
  • 基金资助:
    新疆维吾尔自治区公益性科研院所基本科研业务费专项“新疆山区森林乔木层碳储量动态变化研究”(KY2019043);新疆维吾尔自治区公益性科研院所基本科研业务费专项“天山西部天然乔木层碳潜力研究”(KY2020019)

Above-Ground Biomass Prediction of Arbor Forest in Altay Mountain Area Based on High-Resolution Remote Sensing Data

ZHANG Huifang(), ZHU Yali, ZHANG Jinglu, GAO Jian, DILIXIATI·Baoerhan   

  1. Modern Forestry Research Institute of Xinjiang Academy of forestry,Urumqi 830000,China
  • Received:2023-02-20 Revised:2023-04-24 Online:2023-04-28 Published:2023-06-26

摘要:

为了在区域尺度上精准和便捷地估测森林生物量,以高分遥感数据和实地调查数据为基础,通过提取植被指数、纹理等遥感特征变量,并运用最近邻算法(k-NN)构建乔木林地上生物量预测模型。结果表明,运用k-NN进行区域尺度上乔木林生物量遥感定量估测,当k值为2,特征为B1(波段1)、SR(简单植被指数)、NDVI(归一化植被指数)、B4(波段4)时,研究区乔木林生物量估测结果最优。通过分析可知:乔木林生物量整体表现不高,地上生物量为803.90万t,单位面积生物量均值为82.15 t/hm2;乔木林主要龄组是成熟林时,其面积和生物量占比均最大;在海拔1 500~2 400 m范围,乔木林单位生物量较高。

关键词: 乔木林, 地上生物量, 最近邻算法(k-NN), 遥感反演, 特征选择

Abstract:

In order to accurately and conveniently estimate forest biomass at the regional scale,remote sensing characteristic variables such as vegetation index and texture were extracted based on high-resolution remote sensing data and field survey data,and the nearest neighbor algorithm (k-NN) was used to construct a forest aboveground biomass prediction model.The results showed that using k-NN to quantitatively estimate the biomass of tree forests at the regional scale,when k value was 2 and the characteristics were B1 (band 1),SR (simple vegetation index),NDVI (normalized vegetation index) and B4 (band 4),the forest biomass estimation results were optimal.The above ground biomass was 8 039 000 tons,and the average biomass per unit area was 82.15 t/hm2.When the main age group of arbor forest wasmature forest,its area and biomass ratio werethe highest.The unit biomass of arbor forest was higher in the altitude range of 1 500 ~ 2 400m.

Key words: arbor forest, above-ground biomass, nearest neighbor algorithm (k-NN), remote sensing inversion, feature selection

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