Environmental vulnerability to linear erosive processes in Brazilian Cerrado

IF 5.7 1区农林科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Catena Pub Date : 2025-10-01 DOI:10.1016/j.catena.2025.109496

Melina Fushimi , Viviane Capoane , Caio Augusto Marques dos Santos

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引用次数: 0

Abstract

In recent decades, land use and cover by pasture and, more recently, by soybean cultivation, have intensified and/or triggered accelerated erosive processes in the Brazilian Cerrado. Thus, the aim of this study was to analyze the environmental vulnerability to linear erosive processes based on aspects of landform (compartments of relief and slope), soil, and land use and cover in a region of the Brazilian Cerrado, between 1985 and 2022. Mapping of environmental vulnerability to linear erosive processes was carried out in 1985 and 2022, based on the Analytic Hierarchy Process (AHP), fieldwork, and soil collection at three points, enabling identification of three levels of environmental vulnerability: low, medium, and high. Areas with low environmental vulnerability presented the smallest percentage area (15.10% in 1985 and 12.85% in 2022) and was related to flat tops of hills, remaining Cerrado vegetation of forest and savanna formations, and sandy soils. The medium environmental vulnerability showed an increase in area of 7.18% in the period analyzed and the main cause for this was deforestation for pasture and soybean plantations. The high environmental vulnerability was significant, with 47.09% and 42.16% of the total area in 1985 and 2022, respectively, and including areas of steep slopes, clayey and shallow soils, pasture, and exposed soil. Given these results, it is concluded that the various phytophysiognomies of the Cerrado are being deforested by anthropogenic activities, which are the main factor in accelerated erosion. Therefore, there is an urgent need to implement soil conservation techniques and recover degraded areas, in addition to more effective environmental management.

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巴西塞拉多地区线性侵蚀过程的环境脆弱性

近几十年来，在巴西塞拉多，牧场的土地利用和覆盖以及最近的大豆种植加剧和/或引发了加速的侵蚀过程。因此，本研究的目的是分析1985年至2022年间巴西塞拉多地区地形（地形和坡度）、土壤、土地利用和覆盖等方面对线性侵蚀过程的环境脆弱性。1985年和2022年，基于层次分析法（AHP）、实地调查和三个地点的土壤收集，对线性侵蚀过程的环境脆弱性进行了映射，从而确定了低、中、高三个级别的环境脆弱性。低环境脆弱性区所占比例最小（1985年为15.10%，2022年为12.85%），与平顶山、剩余塞拉多植被（森林和稀树草原）和沙质土壤有关。中等环境脆弱性的面积在分析期内增加了7.18%，其主要原因是放牧和大豆种植的毁林。高环境脆弱性显著，1985年和2022年分别占总面积的47.09%和42.16%，包括陡坡区、粘浅土区、牧场区和暴露土区。鉴于这些结果，可以得出结论，塞拉多的各种植物地貌正在被人为活动砍伐，这是加速侵蚀的主要因素。因此，除了更有效的环境管理外，迫切需要实施土壤保持技术和恢复退化地区。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catena 环境科学-地球科学综合

CiteScore

10.50

自引率

9.70%

发文量

816

审稿时长

54 days

期刊介绍： Catena publishes papers describing original field and laboratory investigations and reviews on geoecology and landscape evolution with emphasis on interdisciplinary aspects of soil science, hydrology and geomorphology. It aims to disseminate new knowledge and foster better understanding of the physical environment, of evolutionary sequences that have resulted in past and current landscapes, and of the natural processes that are likely to determine the fate of our terrestrial environment. Papers within any one of the above topics are welcome provided they are of sufficiently wide interest and relevance.