Hydrogeochemical and environmental water quality standards in the overlap between high mountainous natural protected areas and copper mining activities (Mapocho river upper basin, Santiago, Chile)

Valenzuela-Díaz, Martín J.; Navarrete-Calvo, Alvaro; Caraballo, Manuel A.; McPhee, James; García, Andreína; Correa-Burrows, José Pablo; Navarro-Valdivia, Leonardo

doi:10.1016/j.jhydrol.2020.125063

Cited by 11 publications

(3 citation statements)

References 18 publications

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“…Valenzuela‐Diaz et al. (2020) found increases in median SO 4 and Cu concentrations in the Yerba Loca tributary of the Mapocho River, central Chile, from 2001 to 2017, with magnitudes similar to those reported by Flores et al. (2017).…”

Section: Introductionsupporting

confidence: 60%

“…Thies et al (2007) observed an increase in SO 4 of ∼9 mg/L/yr in fall from 1985 to 2005 in the Rasass See, an alpine lake in South Tyrol, Italy. Valenzuela-Diaz et al (2020) found increases in median SO 4 and Cu concentrations in the Yerba Loca tributary of the Mapocho River, central Chile, from 2001 to 2017, with magnitudes similar to those reported by Flores et al (2017). Finally, upward trends have been inferred (but not verified) at two additional sites in the Pyrenees, northern Spain, based on indirect observations, including expanding streambed precipitates (Zarroca et al, 2021) and increasing metal concentrations in recent lake sediments (Zaharescu et al, 2016).…”

Section: Introductionmentioning

confidence: 67%

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Climate‐Driven Increases in Stream Metal Concentrations in Mineralized Watersheds Throughout the Colorado Rocky Mountains, USA

Manning,

Petach,

Runkel

et al. 2024

Water Resources Research

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Increasing stream metal concentrations apparently caused by climate warming have been reported for a small number of mountain watersheds containing hydrothermally altered bedrock with abundant sulfide minerals (mineralized watersheds). Such increases are concerning and could negatively impact downstream ecosystem health, water resources, and mine‐site remediation efforts. However, the pervasiveness and typical magnitude of these trends remain uncertain. We aggregated available streamwater chemistry data collected from late summer and fall over the past 40 years for 22 mineralized watersheds throughout the Colorado Rocky Mountains. Temporal trend analysis performed using the Regional Kendall Test indicates significant regional upward trends of ∼2% of the site median per year for sulfate, zinc, and copper concentrations in the 17 streams affected by acid rock drainage (ARD; median pH ≤ 5.5), equivalent to concentrations roughly doubling over the past 30 years. An examination of potential load trends utilizing streamflow data from eight “index gages” located near the sample sites provides strong support for regionally increasing sulfate and metal loads in ARD‐affected streams, particularly at higher elevations. Declining streamflows are likely contributing to regionally increasing concentrations, but increasing loads appear to be on average an equal or greater contributor. Comparison of selected site characteristics with site concentration trend magnitudes shows the highest correlation for mean annual air temperature and mean elevation (R2 of 0.42 and 0.35, respectively, with all others being ≤0.14). Future research on climate‐driven controlling mechanisms should therefore focus on processes such as melting of frozen ground directly linked to site mean temperature and elevation.

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Section: Introductionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 67%

Climate‐Driven Increases in Stream Metal Concentrations in Mineralized Watersheds Throughout the Colorado Rocky Mountains, USA

Manning,

Petach,

Runkel

et al. 2024

Water Resources Research

View full text Add to dashboard Cite

show abstract

“…However, it is challenging to link mining discharges to concentrations in surface waters since high concentrations could also be associated with natural conditions (Bokar et al 2020), pollution from agriculture (Donoso, Cancino, and Magri 1999), and abandoned tail deposits from old mining activities (Oyarzún et al 2012). Consequently, it is necessary to establish how mining production changes the concentrations of pollutants in water bodies to identify the damage generated by the activity (Valenzuela-Díaz et al 2020) and thus avoid attributing environmental damage to the natural conditions of the study area. This study economically evaluates the externalities to health and agricultural production caused by copper mining in the regions of Coquimbo, Valparaíso, and O’Higgins in Chile.…”

mentioning

confidence: 99%

An Economic Evaluation of the Health and Agricultural Damages Caused by Copper Mining in Chile

Campos

Mardones

2022

Lat. Am. res. rev.

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This study assesses the environmental damage caused by copper mining on surface water bodies in Chile. The few official records on the discharges and concentrations of arsenic and copper only allow for identifying the impacts of some mining operations in the regions of Coquimbo, Valparaíso, and O’Higgins. The economic valuation is carried out through the impact pathway approach, which relates copper production, discharges, concentrations, and dose-response coefficients to establish effects on health and agriculture. The results show that the economic damage due to water pollution occurs mainly in the regions of Coquimbo and O’Higgins. The above is explained because the greatest externalities are generated in agricultural areas, while the damage to health is low because of the small population exposed (97.6% versus 2.4%). Finally, total damages represent 0.43%, 0.26%, and 0.0001% of copper sales in the mining operations analyzed in the regions of Coquimbo, O’Higgins, and Valparaíso, respectively.

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Ecological Risk Assessment of Heavy Metal Pollution in Water Resources

Singh,

Babu

2023

Metal Organic Frameworks for Wastewater Contaminant Removal

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Hydrogeochemical and environmental water quality standards in the overlap between high mountainous natural protected areas and copper mining activities (Mapocho river upper basin, Santiago, Chile)

Cited by 11 publications

References 18 publications

Climate‐Driven Increases in Stream Metal Concentrations in Mineralized Watersheds Throughout the Colorado Rocky Mountains, USA

Climate‐Driven Increases in Stream Metal Concentrations in Mineralized Watersheds Throughout the Colorado Rocky Mountains, USA

An Economic Evaluation of the Health and Agricultural Damages Caused by Copper Mining in Chile

Ecological Risk Assessment of Heavy Metal Pollution in Water Resources

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