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A new method for creating maps of artificially drained areas in large river basins based on aerial photographs and geodata

机译:基于航空摄影和地理数据的大型流域人工流域地图创建的新方法

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With regard to the creation of river basin plans and programmes of measures according to the EU Water Framework Directive, the importance of model-supported analyses of nutrient inputs into aquatic systems and the localization of source areas is increasing. Especially in lowland regions artificial drainage installations play a major role, but little information exists concerning their location within larger river basins. Therefore, artificially drained lands were identified by interpreting aerial photographs and typical site conditions of the drained plots were derived. A GIS-based approach was then developed, which allows the delineation of artificially drained lands by combining various site conditions like soil properties and land use type. After checking the validity of a derived map for the River Ems basin (12 940 kmpo) with small-scale drainage installation maps, the approach was applied to northwestern Germany (98 000 kmpo). This was followed by a discussion of results and uncertainties. Copyright pb 2008 John Wiley & Sons, Ltd.
机译:关于根据欧盟水框架指令制定流域计划和措施计划,由模型支持的对水生系统营养输入和源区本地化分析的重要性日益增加。尤其是在低地地区,人工排水装置起着主要作用,但是关于它们在较大流域中的位置的信息很少。因此,通过解释航空照片来识别人工流失的土地,并得出流失地块的典型场地条件。然后开发了一种基于GIS的方法,该方法可以通过结合各种场地条件(如土壤性质和土地利用类型)来描绘人工流失的土地。在用小型排水安装图检查了Ems河盆地(12 940 kmpo)的派生图的有效性之后,将该方法应用于德国西北部(98 000 kmpo)。随后讨论结果和不确定性。版权所有pb 2008 John Wiley&Sons,Ltd.

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