Geomorphological records of holocene climate pulses and anthropic actions: a comparison of coastal environmental systems in Brazil

• Grant number: 23/16236-5
• Support Opportunities: Regular Research Grants
• Start date: May 01, 2024
• End date: April 30, 2026
• Field of knowledge: Humanities - Geography - Human Geography
• Principal Investigator: Archimedes Perez Filho
• Grantee: Archimedes Perez Filho
• Host Institution: Instituto de Geociências (IG). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated researchers: André de Oliveira Souza ; Felipe Gomes Rubira ; Francisco Afonso Cavalcanti Júnior ; Luca Lämmle ; Vinícius Borges Moreira

Abstract

The current proposal is grounded in a systemic and geomorphological approach, specifically focusing on relief compartmentalization, surface structure of the landscape, and morphodynamics. The objective is to continue the discussions from previous projects with the intention to conclude ongoing works on the genesis and spatio-temporal transformation of fluvial, fluviomarine, and marine terraces, as well as alluvial fans, in coastal contexts in Northeast Brazil. The project also aims to understand the dynamics of surficial covers, emphasizing the fundamental characterization of the landscape's surface structure to address temporal and genetic gaps related to the evolution of terrace levels, alluvial fans, and their associated surficial covers. It seeks to establish connections between their genesis, climatic pulses, and more recent land use and occupation. In this context, coastal areas (Costa do Descobrimento - BA, Piranhas-Açu - RN, and the Western and Eastern Coasts of Maranhão - MA) were selected to compare the genetic understanding of the associated features, to test the main hypotheses raised. To achieve this objective, the techniques will encompass geotechnologies in the field of geosciences, integrating data from Optically Stimulated Luminescence (OSL) and 210Pb dating, 2D fractal analysis, and Deep Learning. Additionally, morphometric, morphoscopic, and granulometric analysis will be conducted. Finally, GPR will also be utilized. It is therefore believed that, due to the regional scope of the proposed analysis and the number of techniques employed, it will be possible to identify synchronic and diachronic elements in the genesis of the studied forms. The techniques and methodologies will provide knowledge of the particularities of the continental and coastal environmental dynamics that acted on the Brazilian territory at different times, contributing to the understanding of anthropic processes related to land use and occupation. (AU)