摘要
以祁连山区天涝池流域的青海云杉为研究对象,使用数码相机对林冠进行拍照,获取林分结构在不同太阳位置下的数码照片,利用图像处理方法估算不同图像的空隙度.研究结果表明林下某一固定位置的空隙度随着太阳位置的变化有较大的时间变异.提供了一种将太阳位置因素考虑到空隙度测定中的方法,为生态水文模型的研究提供高精度参数.
Qinghai spruce (Picea crassifolia) in the Qilian Mountains was selected as a research object. Digital photo of stand structure under the different solar position was acquired by taking photos of crown canopy using digital camera, the canopy openness under the different solar position was figured out by editing photos. The re- sult showed that the canopy openness has quite large variation with variations of sun's positions, in turn there has different light distribution in forest floor. We provided a new method to determinate the canopy openness, in hope to provide accurate estimation method of the parameter for ecohvdroloQical models.
出处
《兰州大学学报(自然科学版)》
CAS
CSCD
北大核心
2016年第5期628-633,共6页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(91425301)
关键词
数码照片
太阳位置
林分空隙度
青海云杉
祁连山
digital photo
sun position
canopy openness
Qinghai spruce
Qilian Mountain
作者简介
赵传燕(1963-),女,山东曹县人,教授,博士研究生导师,e-mail:nanzhr@lzb.ac.cn,研究方向为生态水文,通信联系人.