Friesen et al. (2025) Uso Intensivo Do Aquífero Cárstico Em Colombo-Pr Através De Poços Tubulares: Riscos E Desafios Para a Sustentabilidade Hídrica

Identification

• Journal: Caderno Intersaberes
• Year: 2025
• Date: 2025-10-31
• Authors: Ana Carolina Kowalski Friesen, André Francisco Matsuno Da Frota
• DOI: 10.22169/cadernointer.v14n53.3642

Research Groups

• Centro Universitário Internacional Uninter (Brazil)

Short Summary

This study analyzes the environmental and socioeconomic impacts of intensive groundwater exploitation in the karst aquifer of Colombo, Paraná, Brazil, exacerbated by climate change. It identifies the consequences of overexploitation, such as groundwater level decline, land subsidence, and water quality degradation, and proposes sustainable management strategies based on hydrogeological studies and public policies.

Objective

• To analyze the effects of overexploitation of the karst aquifer in Colombo, Paraná, identify sustainable management strategies, and propose measures based on hydrogeological studies and public policies, using both qualitative and quantitative approaches.

Study Configuration

• Spatial Scale: Municipality of Colombo, Paraná, Brazil, focusing on the Karst Aquifer which covers approximately 86.77 square kilometers (44% of the municipal territory) within the larger 4,500 square kilometer aquifer system of the Curitiba Metropolitan Region.
• Temporal Scale: Analysis of data and events primarily from 2018 to 2024, with specific focus on prolonged drought periods between 2019 and 2021, and historical subsidence cases from 1995 to 1998.

Methodology and Data

• Models used:
  • Methods for hydraulic parameter determination: Theis and Cooper-Jacob (for pumping tests).
  • Water balance calculation for hydrogeological compartments.
• Data sources:
  • Bibliographic review of scientific articles, books, and reports on water resource management and karst aquifers.
  • Documentary research of official regulations and legislation related to groundwater exploitation (national, state, and municipal).
  • Secondary data from public agencies:
    • Brazilian Institute of Geography and Statistics (IBGE), including the 2022 Census.
    • Paraná Institute of Water and Land (IAT-PR), including monthly reports on well drilling permits (Anuências, Outorgas Prévias, Outorgas de Direito, Uso Independente de Outorga) from 2018 to 2024.
    • Paraná Institute for Economic and Social Development (IPARDES).
    • National Water Agency (ANA).
    • Confederation of Agriculture and Livestock of Brazil (CNA).
    • Climatempo for climatological data.
  • Hydrogeological studies and water quality data from specific wells in the Tumiri and Fervida basins.

Main Results

• Intensive exploitation of the karst aquifer in Colombo, Paraná, has led to significant environmental and socioeconomic impacts, including groundwater level decline, land subsidence, and water quality degradation.
• Prolonged drought periods between 2019 and 2021, linked to La Niña, exacerbated the water crisis, leading to critical water scarcity recognized by the National Water Agency (ANA).
• The number of groundwater well drilling permits in Colombo showed a growing trend between 2018 and 2024, with a peak of 30 movements in 2021.
• The karst aquifer is highly vulnerable due to its high infiltration rate and a relatively short response time to precipitation (approximately 45 days in Fervida basin and 75 days in Tumiri basin).
• Water quality analyses in wells from the Tumiri and Fervida basins revealed concentrations of total coliform bacteria (7.4 NMP and 121.1 NMP, respectively) and nitrate (NO3-) levels up to 10.1 milligrams per liter in Fervida, nearing the World Health Organization's potable water limit of 10 milligrams per liter, indicating potential contamination.
• Between 1995 and 1998, the region experienced land subsidence and collapse, causing cracks in roads and damage to residences, associated with well pumping.
• Excessive pumping has caused the drying of important natural springs, land collapses, and the degradation of water quality, impacting domestic supply, irrigation, and aquaculture (fish farming lakes turned into sinkholes).

Contributions

• Provides a comprehensive analysis of the impacts of karst aquifer overexploitation in a specific, vulnerable urban-rural interface (Colombo, Paraná).
• Synthesizes hydrogeological data, climate information, and regulatory frameworks to highlight the urgency of sustainable water management.
• Proposes concrete measures for sustainable management, including the development of vulnerability maps, revision of well location methods, establishment of protection perimeters, and improved hydraulic parameter determination for water balance calculations.
• Emphasizes the need for stricter enforcement of existing legislation and the mandatory involvement of qualified professionals (e.g., geologists) in well drilling to ensure the safety and sustainability of groundwater resources.

Funding

Not explicitly mentioned in the paper.

Citation

@article{Friesen2025Uso,
  author = {Friesen, Ana Carolina Kowalski and Frota, André Francisco Matsuno Da},
  title = {Uso Intensivo Do Aquífero Cárstico Em Colombo-Pr Através De Poços Tubulares: Riscos E Desafios Para a Sustentabilidade Hídrica},
  journal = {Caderno Intersaberes},
  year = {2025},
  doi = {10.22169/cadernointer.v14n53.3642},
  url = {https://doi.org/10.22169/cadernointer.v14n53.3642}
}

Generated by BiblioAssistant using gemini-2.5-flash (Google API)