杨静学, 黄本胜, 陈亮雄, 洪昌红. 基于PT-T和SBDART模型的桉树人工林蒸散量研究[J]. 华南师范大学学报(自然科学版), 2014, 46(4): 23. doi: 10.6054/j.jscnun.2014.06.118
引用本文: 杨静学, 黄本胜, 陈亮雄, 洪昌红. 基于PT-T和SBDART模型的桉树人工林蒸散量研究[J]. 华南师范大学学报(自然科学版), 2014, 46(4): 23. doi: 10.6054/j.jscnun.2014.06.118
Yang Jingxue, Huang Bengshen, Chen Liangxiong, Hong Changhong. Application of PT-T and SBDART model to estimate evapotranspiration of eucalyptus[J]. Journal of South China Normal University (Natural Science Edition), 2014, 46(4): 23. doi: 10.6054/j.jscnun.2014.06.118
Citation: Yang Jingxue, Huang Bengshen, Chen Liangxiong, Hong Changhong. Application of PT-T and SBDART model to estimate evapotranspiration of eucalyptus[J]. Journal of South China Normal University (Natural Science Edition), 2014, 46(4): 23. doi: 10.6054/j.jscnun.2014.06.118

基于PT-T和SBDART模型的桉树人工林蒸散量研究

Application of PT-T and SBDART model to estimate evapotranspiration of eucalyptus

  • 摘要: 本文基于PT-T蒸散发模型和SBDART辐射传输模式利用Landsat TM影像对广东省桉树林区域尺度的蒸散量进行了分析计算,蒸散量计算的参照物为同区域的天然混交林。实验结果显示:1)两类林区的区域蒸散量与归一化植被指数NDVI呈正相关关系,且增长率相近;2)相同地理环境条件下,桉树林区蒸散发量要大于天然混交林区,当植被指数为0.4时,24小时ET相差约0.18mm。以上结果说明桉树林在广东省这类湿润气候区依然存在生长优势,生长过程相对天然混交林将消耗更多的水分,并对该区域的水循环过程产生影响。

     

    Abstract: A compare experiment is set to study the Evapotranspiration of eucalyptus in Guangdong Province. Remote sensing image (Landsat TM) is used to retrieval evapotranspiration of eucalyptus forest and natural mixed forest based PT-T and SBDART model. The experimental final results show that: 1)regional evapotranspiration and vegetation index (NDVI) are positive correlation in both types of forests; 2)On the same geographical and environmental conditions, the eucalyptus forest region has a stronger evapotranspiration phenomenon than natural mixed forest region. When the NDVI was 0.4, the difference of 24 hour ET is about 0.18mm.The research notes that the eucalyptus forest still has growth vigor in humid climate areas of Guangdong. The region of the eucalyptus forest will consumes more water with the fast growth process than the natural mixed forest, and further impacts on the process of regional water circulation.

     

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