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Mapping peatland disturbance in Ireland: an object oriented approach

机译：绘制爱尔兰泥炭地干扰图：一种面向对象的方法

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摘要

Peatlands contain large amounts of soil organic carbon. In a pristine state they sequester atmospheric carbon dioxide (CO_2), however, when they are disturbed they emit it. In Ireland peatlands are extensive and cover 20% of the national land area. They contain between 53% and 62% of the total national soil organic carbon. However, large areas of Irish peatlands have been disturbed by anthropogenic activity. This activity includes drainage, mechanical extraction and burning. These activities lead to the reduction of the resilience of the peatland to climate and environmental change and can lead to the increased vulnerability of the peatland carbon stock. In this research an object oriented approach is used to examine high resolution imagery of a raised bog in Ireland and to extract a map of disturbed peatlands. The object oriented approach is implemented in ArcGIS with high resolution Geoeye-1 satellite imagery. The main disturbance classes identified were rough grazing, pasture, molinia, coniferous forest, high bog, drained bog and scrub. The users accuracy for each individual class ranged from 66% to 92% and the overall accuracy assessment for the disturbance map 85%.
机译：泥炭地含有大量的土壤有机碳。在原始状态下，它们会隔离大气中的二氧化碳（CO_2），但是当它们受到干扰时，会释放出来。在爱尔兰，泥炭地面积很广，占全国土地面积的20％。它们包含全国土壤有机碳总量的53％至62％。但是，大面积的爱尔兰泥炭地已被人为活动所干扰。这项活动包括排水，机械提取和燃烧。这些活动导致泥炭地对气候和环境变化的适应力下降，并可能导致泥炭地碳储量的脆弱性增加。在这项研究中，采用了一种面向对象的方法来检查爱尔兰凸起的沼泽的高分辨率图像，并提取受干扰的泥炭地的地图。面向对象的方法是在ArcGIS中使用高分辨率Geoeye-1卫星图像实现的。确定的主要干扰类别是粗放牧，牧场，莫利尼亚，针叶林，高沼泽，排水沼泽和灌木丛。每个类别的用户准确度范围从66％到92％，而干扰图的整体准确度评估为85％。

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