Scholarlink

<p>The agricultural expansion in the Cerrado biome is characterized by rapid human occupation and intensified economic activities associated with the conversion of native vegetation into extensive cropland for grain production. This study examines the physicochemical parameters and elemental distribution in surface waters of the Uruçuí-Preto River during the dry and rainy seasons in a watershed located within Brazil’s last agricultural frontier, where land-use intensification poses significant risks to water resources. Surface water samples were collected at 19 points along the river’s main channel over a complete hydrological year (January to December 2021). Physicochemical analyses—pH, electrical conductivity (EC), temperature, and dissolved oxygen (DO)—and the determination of Ca, Mg, P, K, Mn, Zn, Fe, and Cu were conducted to evaluate the influence of seasonality and land-use/land-cover changes. The results indicate that local climatic conditions strongly influence the concentration of these elements. Water quality in the watershed was not substantially compromised despite its proximity to agricultural areas. Canonical correlation analysis revealed that different land-use types, including croplands and pastures, were associated with several water variables, such as physicochemical parameters (pH, EC, and DO) and specific elements (e.g., Ca, P, and Zn). The study concludes that continuous water-quality monitoring is essential to mitigate the negative impacts of excessive agricultural inputs and urban pollution. Spatial and temporal variability analyses proved effective for ensuring the sustainability of water resources in the Uruçuí-Preto River watershed. Overall, the findings highlight the importance of adopting sustainable management practices to safeguard water quality in regions vulnerable to environmental degradation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Factors controlling the Geochemistry of the Uruçuí-Preto River Water in the Northeastern Brazilian Cerrado during a Complete Hydrological Cycle

  • 期刊论文

  • 发表日期：

    2025年12月12日

查看全文
  • Thaís Paula Martins Nunes,
  • Ozeas da Silva Costa Jr,
  • José Wellington Batista Lopes,
  • Luis Ricardo Romero Arauco,
  • Kaíque Mesquita Cardoso,
  • Pâmalla Graziely Carvalho Morais,
  • Paloma Cunha Saraiva,
  • Ingridi Antonia Matos de Souza,
  • Paula Nascimento Alves,
  • José Domingos Santos da Silva,
  • Cácio Luiz Boechat

摘要

The agricultural expansion in the Cerrado biome is characterized by rapid human occupation and intensified economic activities associated with the conversion of native vegetation into extensive cropland for grain production. This study examines the physicochemical parameters and elemental distribution in surface waters of the Uruçuí-Preto River during the dry and rainy seasons in a watershed located within Brazil’s last agricultural frontier, where land-use intensification poses significant risks to water resources. Surface water samples were collected at 19 points along the river’s main channel over a complete hydrological year (January to December 2021). Physicochemical analyses—pH, electrical conductivity (EC), temperature, and dissolved oxygen (DO)—and the determination of Ca, Mg, P, K, Mn, Zn, Fe, and Cu were conducted to evaluate the influence of seasonality and land-use/land-cover changes. The results indicate that local climatic conditions strongly influence the concentration of these elements. Water quality in the watershed was not substantially compromised despite its proximity to agricultural areas. Canonical correlation analysis revealed that different land-use types, including croplands and pastures, were associated with several water variables, such as physicochemical parameters (pH, EC, and DO) and specific elements (e.g., Ca, P, and Zn). The study concludes that continuous water-quality monitoring is essential to mitigate the negative impacts of excessive agricultural inputs and urban pollution. Spatial and temporal variability analyses proved effective for ensuring the sustainability of water resources in the Uruçuí-Preto River watershed. Overall, the findings highlight the importance of adopting sustainable management practices to safeguard water quality in regions vulnerable to environmental degradation.