ABSTRACT

Using ALS LIDAR DEM and OpenStreetMap data we visualise in ArcGIS the geomorphic features of a large, lowland river which flows through the area impacted by urbanisation of a big city – the capital of Poland. We present on one map the main geomorphological surfaces and their exact boundaries: valley edge, terrace front and floodplain juxtaposed with buildings and the main transportation corridors. We identify convex aeolian and fluvial landforms: dunes, levees, sandy lobes including crevasse splays, ridges between swales, sandy bars, islands; and concave erosional landforms: floodplain channels, crevasse channels, oxbow lakes, palaeo-meanders, tributary channels, and chute channels. We draw implications for flood management, geo-archaeology geo-heritage conservation. We search for traces of extreme flood events in the Holocene, also on the higher terraces which the river developed by its deposition in the Pleistocene.

摘要

使用ALS LIDAR DEM和OpenStreetMap数据，我们在ArcGIS中可视化了一条大的低地河流的地貌特征，这些河流流经受大城市-波兰首都城市化影响的区域。我们在一张地图上显示了主要的地貌表面及其确切的边界：山谷边缘，阶地前缘和泛​​滥平原与建筑物和主要交通走廊并列。我们识别出凸出的风沙和河流地貌：沙丘，堤防，沙裂，包括裂隙八达通，大沼泽地之间的山脊，沙洲，岛屿；和凹状侵蚀地貌：洪泛区河道，裂隙河道，牛弓湖，古弯道，支流河道和溜槽河道。我们对洪水管理，地质考古和地理遗产保护提出了一些建议。我们在全新世寻找极端洪水事件的痕迹，