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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >A geomatics-based approach for the derivation of the spatial distribution of sediment transport processes in periglacial mountain environments
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A geomatics-based approach for the derivation of the spatial distribution of sediment transport processes in periglacial mountain environments

机译：基于地理学的方法得出冰川期山区环境中泥沙输送过程的空间分布

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Within this paper modern techniques such as satellite image analysis and tools provided by geographic information systems (GIS.) are exploited in order to extend and improve existing techniques for mapping the spatial distribution of sediment transport processes. The processes of interest comprise mass movements such as solifluction, slope wash, dirty avalanches and rock- and boulder falls. They differ considerably in nature and therefore different approaches for the derivation of their spatial extent are required. A major challenge is addressing the differences between the comparably coarse resolution of the available satellite data (Landsat TM/ETM+, 30 in x 30 m) and the actual scale of sediment transport in this environment. A three-stepped approach has been developed which is based on the concept of Geomorphic Process Units (GPUs): parameterization, process area delineation and combination. Parameters include land cover from satellite data and digital elevation model derivatives. Process areas are identified using a hierarchical classification scheme utilizing thresholds and definition of topology. The approach has been developed for the Karkevagge in Sweden and could be successfully transferred to the Rabotsbekken catchment at Okstindan, Norway using similar input data. Copyright (C) 2008 John Wiley & Sons, Ltd.
机译：在本文中，利用现代技术，例如卫星图像分析和地理信息系统（GIS。）提供的工具，以扩展和改进用于绘制沉积物输送过程空间分布图的现有技术。感兴趣的过程包括大量运动，例如溶蚀作用，边坡冲刷，肮脏的雪崩以及岩石和巨石坠落。它们在性质上有很大不同，因此需要不同的方法来推导其空间范围。一个主要的挑战是解决可用卫星数据的相对粗略分辨率（Landsat TM / ETM +，30 in x 30 m）与这种环境下泥沙输送的实际规模之间的差异。根据地貌过程单元（GPU）的概念，开发了一种三步方法：参数化，过程区域划分和组合。参数包括卫星数据和数字高程模型派生的土地覆盖。使用利用阈值和拓扑定义的分层分类方案来标识过程区域。该方法已经为瑞典的Karkevagge开发，可以使用类似的输入数据成功转移到挪威Okstindan的Rabotsbekken流域。版权所有（C）2008 John Wiley＆Sons，Ltd.

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