Development of the techniques monitoring the forest dynamics at meso-scale using aerial photographs

开发利用航空照片监测中尺度森林动态的技术

基本信息

批准号：
13356003
负责人：
YAMAMOTO Shin-ichi
金额：
$ 29.95万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13356003/
关键词：
aerial photographs digital elevation models forest dynamics GIS OPS long term canopy dynamics meso-scale monitoring リモートセンシングレーザースキャナーギャップ GPS ニホンジカブナ枝葉クラスター

项目摘要

In order to develop techniques monitoring the forest dynamics at meso-scale using aerial photographs, following studies were performed ; 1) development of monitoring techniques by using OPS measurement on the ground survey and the aerial photographs, 2) inclusion of GIS method, and 3) application of these techniques and method to disturbed forested area and forest decline. Digital elevation models (DEM) of canopy surface (at the study sites of Mt.Tatera, Mt.Daisen and Mt.Ontake) and ground surface (only at Mt.Daisen site) were constructed by using aerial photographs. To validate the analyzing method adopted, a test plot, which was included in the study area, with topographic data obtained by ground survey, was used. From the results, the method adopted was ascertained to validate the present analysis. The conclusions of Mt Daisen's study are ; although temporal variation of gap formation and closure was correlated with the frequency and severity of typhoon attack, the results suggest that if the present situation will continue, this old-growth beech stand is going to be a open stand, contrary to previous other studies. GIS (Geographic Information System ; Arc View 3.2a / ESRI) was used for many analyses in this study. Recently, the possibility of determining canopy height by various airborne laser profiling and lidar systems has been examined. However, to date, insufficient data have been acquired using these systems for analyzing long-term canopy dynamics. Therefore, since archived aerial photographs are available for many areas, the method adopted in this study is useful for analyzing longterm canopy dynamics.

为了开发用于使用航空照片监测中尺度森林动态的技术，进行了研究； 1）通过在地面调查和航拍照片上使用OPS测量来开发监测技术，2）纳入GIS方法，3）将这些技术和方法应用于干扰森林区域和森林下降。冠层表面的数字抬高模型（DEM）（在Mt.tatera，Mt.Daisen和Mt.Ontake的研究地点）和地面（仅在Mt.Daisen位置）是通过使用航空照片构建的。为了验证所采用的分析方法，使用了一个测试图，该测试图已包含在研究区域中，并使用了地形数据获得的地形数据。从结果中，确定所采用的方法以验证当前的分析。 Daisen山研究的结论是；尽管间隙形成和封闭的时间变化与台风攻击的频率和严重程度相关，但结果表明，如果当前情况将继续，那么与以前的其他研究相反，这种古老的山毛榉架将是一个开放的立场。在本研究中，使用了GIS（地理信息系统； ARC View 3.2A / ESRI）进行许多分析。最近，已经检查了各种机载激光分析和激光雷达系统来确定树冠高度的可能性。但是，迄今为止，使用这些系统来分析长期冠层动力学的数据不足。因此，由于存档的航拍照片可用于许多领域，因此本研究中采用的方法可用于分析长期冠层动态。