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首页> 外文会议>Geoscience and Remote Sensing Symposium, 1995. IGARSS '95. 'Quantitative Remote Sensing for Science and Applications', International >Monitoring Swiss alpine snow cover variations using digital NOAA-AVHRR data
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Monitoring Swiss alpine snow cover variations using digital NOAA-AVHRR data

机译：使用数字NOAA-AVHRR数据监测瑞士高山积雪的变化

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摘要

Within a research project and the programme for a Hydrologic Atlas of Switzerland, charts of the extent and the variations of the snow cover in Switzerland for two hydrologically and meteorologically different years were derived from digital NOAA-AVHRR data. During the two years, 32 satellite scenes were classified using supervised classification techniques. For the generation of the snow cover charts, up to 12 categories (several sub-categories for vegetation, water, snow, and clouds) were used. The final results were thematic maps differentiating between snow covered and non-snow covered (aper) areas. The snow cover charts were geocoded to the Swiss reference system using a ground-control-point approach allowing the superimposition onto a digital elevation model (DEM) and a digital boundary map of Switzerland within a geographic information system (GIS). Based on this data set, the snow coverage and its variations as well as the snowline for the two years under investigation were determined for several river basins in Switzerland. Furthermore, snow cover depletion curves for the two ablation periods, separately for several elevation zones, were generated which were necessary for snowmelt runoff computations in the Rhine-Felsberg basin using the SRM Model.
机译：在一项瑞士水文地图集的研究项目和计划中，从数字NOAA-AVHRR数据中得出了瑞士在两个水文和气象上不同年份的积雪范围和变化图。在这两年中，使用监督分类技术对32个卫星场景进行了分类。为了生成积雪图，最多使用了12个类别（植被，水，雪和云的几个子类别）。最终结果是区分积雪和非积雪（开口）区域的专题图。使用地面控制点方法将雪盖图地理编码到瑞士参考系统，从而可以在地理信息系统（GIS）中叠加到瑞士的数字高程模型（DEM）和数字边界图上。根据此数据集，确定了瑞士多个河流流域的积雪覆盖范围及其变化以及调查的两年的雪线。此外，分别针对几个高程区域生成了两个消融期的积雪枯竭曲线，这对于使用SRM模型计算莱茵-费尔斯贝格盆地融雪径流是必要的。

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