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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Monitoring and reconstructing past biogeomorphic succession within fluvial corridors using stereophotogrammetry
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Monitoring and reconstructing past biogeomorphic succession within fluvial corridors using stereophotogrammetry

机译：使用立体摄影测量技术监测和重建河流走廊内过去的生物地貌演替

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摘要

Past fluvial biogeomorphic succession dynamics, i.e. reciprocal interactions and adjustments between vegetation growth and fluvial landform construction, were monitored and reconstructed using stereophotogrammetry. The four-dimensional spatio-temporal stereophotogrammetric analyses were based on the use of archival analogue and digital aerial photographs. First, we tested the relevance of the technique to produce floodplain digital terrain models (DTMs) and cover height models (CHMs) of the dynamic River Allier, France, and compared the models derived from photogrammetric procedures to field measurements for CHMs and to LiDAR data for DTMs. Automatic photogrammetric procedures tended to create inaccurate digital models with production of outliers, incomplete sectors and areas of confusion especially for analogue stereo-pairs. Expert correction using stereoscopic viewing improved the vertical accuracy of the digital models, but the vegetation height tended to be underestimated: approximately 0.50m for vegetation heights less than 10m, up to 1.50m for tree heights higher than 25m. Second, we applied this method to a wooded point bar located on the channelized River Garonne, France. At the scale of the point bar, accurate biogeomorphic maps that show terrain and vegetation height changes in all three spatial dimensions were produced and accurate vegetation growth curves from the early stages of establishment until maturity were extracted. Assuming that a set of conditions is satisfied (e.g. spatial scale of investigation, quality of the photographs), our results show that the photogrammetric method applied in this research can be used operationally to detect and quantify present fluvial biogeomorphic dynamics (i.e. changes of topography and vegetation canopy height) within fluvial corridors of temperate rivers with satisfactory accuracy. Copyright (c) 2016 John Wiley & Sons, Ltd.
机译：过去的河流生物地貌演替动力学，即植被生长与河流地貌建设之间的相互影响和调节，都通过立体摄影测量法进行了监测和重建。三维时空立体摄影测量分析是基于档案模拟和数字航空照片的使用。首先，我们测试了该技术在法国动态河Allier上产生洪泛区数字地形模型（DTM）和覆盖高度模型（CHM）的相关性，并比较了摄影测量程序衍生的模型与CHM的现场测量结果以及LiDAR数据用于DTM。自动摄影测量程序往往会创建异常的数字模型，从而产生异常值，不完整的扇区和混乱的区域，尤其是模拟立体声对。使用立体观察的专家校正提高了数字模型的垂直精度，但是植被高度往往被低估：对于小于10m的植被高度约为0.50m，对于大于25m的树木高度可达1.50m。其次，我们将此方法应用于位于法国通道河加龙河上的树木繁茂的尖桩。在该点的范围内，绘制了精确的生物地貌图，显示了所有三个空间维度上的地形和植被高度变化，并提取了从建立初期到成熟的准确植被生长曲线。假设满足一组条件（例如调查的空间规模，照片的质量），我们的结果表明，本研究中应用的摄影测量方法可用于检测和量化当前河流生物地貌动力学（即地形和地形变化）。温河沿河走廊内的植被冠层高度）具有令人满意的精度。版权所有（c）2016 John Wiley＆Sons，Ltd.

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