Abstract This article seeks to contribute to the understanding of the dynamics and evolution of landforms, on a regional scale, from the application of morphometric indexes and structural analyzes, in the eastern portion of the Borborema Highlands, Northeast Brazil. The aim of this analysis is to minimize the subjectivities of the classifications and morphological hierarchies in the region in question. We sought to relate the morphology of the eastern sector of Borborema Highlands and the drainages that flow into the Atlantic, thus obtaining a morphometric indicator that would establish, in a quantitative fashion, how this relationship presents itself in the geomorphological landscape, in addition to proposing numerical and morphological thresholds that permitted the delimitation of the Highlands eastern escarpment. For that, the SL/K index was applied, based on HACK (1973) original propositions, subsequently adapted by Seeber and Gornitz (1983), in order to identify sectors of major regional gradient breaks. The Hypsometric Integral values were also obtained in search for correlations between drainage erosion capacity and regional flexural and tectonic influences. Distance measurements between anomalous sectors and base levels on the coast were added. The indexes were applied to the main watersheds that drain the eastern escarpment of the Borborema Highlands: Paraiba (PBW), Goiana (GOW), Capibaribe (CAW), Ipojuca (IPW), Sirinhaem (SIW), Una (UNW) and Mundau (MUW). It was observed that the sectors identified as regional breaks on relief levels are found at different elevations, varying between 150m and 275m, instead of 200m as traditionally designated by regional literature. It was also observed that on the Transversal Zone, between Patos and Pernambuco lineaments, only one major regional gradient break occur, whereas to the south of the Pernambuco Shear Zone more than one regional breaks were found, indicating a predominantly flexural influence in the first context and a more brittle in the second. As for the Hypsometric Integral, it was observed that the relationship commonly made between its values and evolutionary stages in the Davisian sense were not found.

中文翻译：

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形态测量技术在巴西东北部、东部悬崖上的排水点划界中的应用

摘要 本文旨在通过应用形态测量指标和结构分析，在巴西东北部 Borborema 高地东部地区理解区域尺度上的地貌动态和演化。该分析的目的是尽量减少相关地区的分类和形态层次的主观性。我们试图将 Borborema 高地东段的形态与流入大西洋的排水系统联系起来，从而获得一个形态测量指标，以定量的方式确定这种关系如何在地貌景观中呈现出来，此外还提出了允许划定高地东部悬崖的数值和形态阈值。为了那个原因，SL/K 指数基于 HACK (1973) 的原始命题，随后由 Seeber 和 Gornitz (1983) 改编，以识别主要区域梯度断裂的扇区。在寻找排水侵蚀能力与区域弯曲和构造影响之间的相关性时，还获得了 Hypsometric Integral 值。增加了异常扇区和海岸基平面之间的距离测量值。这些指数应用于排出 Borborema 高地东部悬崖的主要流域：帕拉伊巴 (PBW)、戈亚纳 (GOW)、卡皮巴里贝 (CAW)、伊波茹卡 (IPW)、西林海姆 (SIW)、乌纳 (UNW) 和 Mundau ( MUW）。据观察，在不同海拔处发现被确定为区域性救济水平中断的扇区，在 150m 和 275m 之间变化 而不是区域文献传统上指定的 200m。还观察到，在横向带上，在帕托斯和伯南布哥线之间，只有一个主要的区域梯度断裂发生，而在伯南布哥剪切带以南发现了不止一个区域断裂，表明在第一种情况下主要是弯曲影响第二个更脆。至于 Hypsometric Integral，据观察没有发现它的值与戴维斯意义上的进化阶段之间普遍存在的关系。表明在第一种情况下主要是弯曲影响，而在第二种情况下则更脆。至于 Hypsometric Integral，据观察没有发现它的值与戴维斯意义上的进化阶段之间普遍存在的关系。表明在第一种情况下主要是弯曲影响，而在第二种情况下则更脆。至于 Hypsometric Integral，据观察没有发现它的值与戴维斯意义上的进化阶段之间普遍存在的关系。