Hydrochemical variations and contaminant load in the Río Tinto (Spain) during flood events

Cánovas, Carlos Ruiz; Hubbard, Christopher G.; Álvarez, Manuel Olías; Nieto, José Miguel; Black, Stuart; Coleman, Max

doi:10.1016/j.jhydrol.2007.11.022

Cited by 103 publications

(69 citation statements)

References 56 publications

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“…Factors affecting sediment transport are now better known, however, processes governing metal concentrations in rivers and streams remain L. Palleiro et al: Hydroclimatic control of sediment and metal export relatively poorly understood, despite the importance of metals for aquatic ecosystems. Rainfall-runoff events were monitored in metallogenic (Cánovas et al, 2008), urban (McPherson et al, 2005) and agricultural areas , as well as in forest landscapes with serious problems of soil acidification (Borg and Johansson, 1989). However, rural catchment studies focusing on factors affecting metal loads during rainfall-runoff events are limited and most studies have not taken into account both hydrological and meteorological parameters, even though these are important for metal exportation.…”

Section: Introductionmentioning

confidence: 99%

Hydroclimatic control of sediment and metal export from a rural catchment in northwestern Spain

Palleiro

Rodríguez‐Blanco

Taboada-Castro

2014

Hydrol. Earth Syst. Sci.

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Abstract. This paper examines sediment and metal (Al, Fe, Mn, Cu, and Zn) exportation at different timescales (annual, seasonal and event) during a 3-year period (2005)(2006)(2007)(2008) in the Mero River headwater, a rural catchment under humid temperate climate. Interannual differences were found both in annual loads and their distributions throughout the year. At annual scale, sediment and particulate metal loads followed the same trend as streamflow, while dissolved metals showed different patterns. Runoff events contributed to 63 % of the total sediment load, whereas particulate and dissolved loads in events accounted for between 38-61 and 27-49 %, respectively. Runoff events were characterized by high variability in sediment and metal loads, a few events representing a high percentage of the metal exported. Sediment loads were related to maximum and initial discharge. Particulate metal loads were highly correlated with sediment loads, runoff being the hydrological variable that best explains the load of these metals. Dissolved metal loads displayed different patterns. Dissolved Al, showed a great correlation with runoff, while dissolved Mn with maximum discharge.

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Section: Introductionmentioning

confidence: 99%

Hydroclimatic control of sediment and metal export from a rural catchment in northwestern Spain

Palleiro

Rodríguez‐Blanco

Taboada-Castro

2014

Hydrol. Earth Syst. Sci.

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“…AMDs exposed environments are usually considered very toxic to biota as they are characterized, besides low pH values, by very high concentrations of metallic compounds (Leblanc et al, 1996). Such drainages are observed in ancient mining exploitations where oxidation of the extruded rocks leads to the production of sulfuric acid and mobilization of elements such as iron, copper, aluminum and arsenic into the percolating waters (Leblanc et al, 1996;Baker et al, 2004;Canovas et al, 2008). This process leads to a persistent contamination of downstream aquatic environments and is a major concern for environmental and public health in many countries.…”

Section: Introductionmentioning

confidence: 99%

In situ proteo-metabolomics reveals metabolite secretion by the acid mine drainage bio-indicator, Euglena mutabilis

et al. 2012

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Euglena mutabilis is a photosynthetic protist found in acidic aquatic environments such as peat bogs, volcanic lakes and acid mine drainages (AMDs). Through its photosynthetic metabolism, this protist is supposed to have an important role in primary production in such oligotrophic ecosystems. Nevertheless, the exact contribution of E. mutabilis in organic matter synthesis remains unclear and no evidence of metabolite secretion by this protist has been established so far. Here we combined in situ proteo-metabolomic approaches to determine the nature of the metabolites accumulated by this protist or potentially secreted into an AMD. Our results revealed that the secreted metabolites are represented by a large number of amino acids, polyamine compounds, urea and some sugars but no fatty acids, suggesting a selective organic matter contribution in this ecosystem. Such a production may have a crucial impact on the bacterial community present on the study site, as it has been suggested previously that prokaryotes transport and recycle in situ most of the metabolites secreted by E. mutabilis. Consequently, this protist may have an indirect but important role in AMD ecosystems but also in other ecological niches often described as nitrogen-limited.

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“…A longer dataset for Lion Creek (June to October 2015) confirms the association of increased specific conductivity with rainfall-runoff events (Johnston et al 2017). High river flows associated with rainfall-runoff events can substantially increase constituent concentrations and loads (Canovas et al 2008;Banks and Palumbo-Roe 2010;Gozzard et al 2011;Byrne et al 2013;Nordstrom et al 2015;Runkel et al 2016) in streams with extensive streamside tailings (e.g. .…”

Section: Effect Of Rainfall Runoff On Constituent Concentrations and mentioning

confidence: 99%

Synoptic Sampling and Principal Components Analysis to Identify Sources of Water and Metals to an Acid Mine Drainage Stream

Byrne

Runkel

Walton-Day

2016

Geological Society of America Abstracts With Programs

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Combining the synoptic mass balance approach with principal components analysis (PCA) can be an effective method for discretising the chemistry of inflows and source areas in watersheds where contamination is diffuse in nature and/or complicated by groundwater interactions. This paper presents a field-scale study in which synoptic sampling and PCA are employed in a mineralized watershed (Lion Creek, Colorado, USA) under low flow conditions to (i) quantify the impacts of mining activity on stream water quality; (ii) quantify the spatial pattern of constituent loading; and (iii) identify inflow sources most responsible for observed changes in stream chemistry and constituent loading. Several of the constituents investigated (Al, Cd, Cu, Fe, Mn, Zn) fail to meet chronic aquatic life standards along most of the study reach. The spatial pattern of constituent loading suggests four primary sources of contamination under low flow conditions. Three of these sources are associated with acidic (pH <3.1) seeps that enter along the left bank of Lion Creek. Investigation of inflow water (trace metal and major ion) chemistry using PCA suggests a hydraulic connection between many of the left bank inflows and mine water in the Minnesota Mine shaft located to the north-east of the river channel. In addition, water chemistry data during a rainfall-runoff event suggests the spatial pattern of constituent loading may be modified during rainfall due to dissolution of efflorescent salts or erosion of streamside tailings. These data point to the complexity of contaminant mobilisation processes and constituent loading in mining-affected watersheds but the combined synoptic sampling and PCA approach enables a conceptual model of contaminant dynamics to be developed to inform remediation.

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Hydrochemical variations and contaminant load in the Río Tinto (Spain) during flood events

Cited by 103 publications

References 56 publications

Hydroclimatic control of sediment and metal export from a rural catchment in northwestern Spain

Hydroclimatic control of sediment and metal export from a rural catchment in northwestern Spain

In situ proteo-metabolomics reveals metabolite secretion by the acid mine drainage bio-indicator, Euglena mutabilis

Synoptic Sampling and Principal Components Analysis to Identify Sources of Water and Metals to an Acid Mine Drainage Stream

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