ABSTRACT

The article presents changes in the topography of the Toruń area due to the degradation of dunes by human activity, and a reconstruction of their earlier location and morphology. The reconstruction was made on the basis of historical maps and plans from the end of the eighteenth century, as well as contemporary cartographic materials and digital terrain models (DTM). Analysis of the sources showed that the main period of anthropogenic degradation of dunes in the city was the second half of the twentieth century. The balance of changes in the share of dunes within city limits is estimated to be a decrease of about 26.5% over the study period, and by around 60.2% in the part that is presently urbanised.

摘要

本文介绍了由于人类活动导致的沙丘退化，托伦地区地形的变化，以及沙丘早期位置和形态的重建。重建是根据18世纪末的历史地图和计划以及现代制图材料和数字地形模型（DTM）进行的。资料来源分析表明，该城市沙丘人为退化的主要时期是20世纪下半叶。在研究期内，沙丘份额变化在城市范围内的平衡估计减少了约26.5％，而在目前城市化的部分中减少了约60.2％。