Spatio-temporal critical source area patterns of runoff pollution from agricultural practices in the Colombian Andes

Uribe, Natalia; Srinivasan, Raghavan; Corzo, Gerald; Arango, David Alberto García; Solomatine, Dimitri

doi:10.1016/j.ecoleng.2020.105810

Cited by 12 publications

(3 citation statements)

References 42 publications

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“…On the other hand, in the central area of the study area, characterized by scattered rural dwellings and small, low-density populations, the lowest nitrate concentrations www.nature.com/scientificreports/ were detected (< 5 mg/L). Temporally, the highest nitrate concentration rates occurred during the wet period, which could be linked to the increased use of pesticides, typical in Colombian agriculture practices 76 . Lastly, shallow groundwater acidification was observed particularly concentrated between the Sogamoso River and the Lebrija River (Fig.…”

Section: Effect Of Land-use/landcover On Groundwater Qualitymentioning

confidence: 95%

Assessment of groundwater quality for human consumption and its health risks in the Middle Magdalena Valley, Colombia

Lora-Ariza,

Piña,

Donado

2024

Sci Rep

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Groundwater is the primary source of water for people living in rural areas, especially during seasons when surface water is contaminated or unavailable. In Colombia, people use groundwater as drinking water without additional treatment. In addition, there is no infrastructure for wastewater collection and sewage treatment in the region of the Middle Magdalena Valley. The current study aims to evaluate the quality of groundwater in this region to determine any potential health hazards associated with its consumption. To reach the objective, three (3) physicochemical and microbiological sampling campaigns were carried out during different hydrological periods. A total of 428 groundwater samples were analyzed for over 28 parameters. The results were compared with the water quality standards proposed by the US EPA and Colombian regulations for human consumption. The analysis revealed the presence of total and fecal coliforms in 89% and 58% of the analyzed samples, respectively, identifying them as the main contaminants in groundwater. Furthermore, the pH levels did not meet the standards set by the US EPA in 33.8% of the cases and by Colombian regulations in 31.02%. Additionally, 32.8%, 17.6%, 14.3%, and 10.9% of the samples failed to meet the established thresholds for apparent color, magnesium, iron, and nitrates, respectively, under both standards. Moreover, only the analyses of selenium, mercury, and zinc complied with the quality standards under both regulatory frameworks. Based on the Colombian Drinking-Water Quality Risk Index (CDWQRI-IRCA), the risk associated with water quality meant for human consumption was assessed. The results showed that over 84% of the samples analyzed posed a high risk to human health, 4.6% posed a medium risk, 5.5% posed a low risk, and only 5.7% posed no risk at all. Additionally, official mortality statistics for children under four years old were reviewed, which revealed two deaths in 2019 due to Acute Diarrheal Disease (ADD) caused by consumption of contaminated water. Therefore, it is crucial to implement water treatment systems, establish aqueducts in rural areas, and conduct rigorous and systematic monitoring of drinking water to ensure it is safe for human consumption. It is also important to track morbidity and mortality rates associated with water consumption.

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Section: Effect Of Land-use/landcover On Groundwater Qualitymentioning

confidence: 95%

Assessment of groundwater quality for human consumption and its health risks in the Middle Magdalena Valley, Colombia

Lora-Ariza,

Piña,

Donado

2024

Sci Rep

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“…The average concentration-based methods are commonly not consummate for eutrophication evaluation because the non-point source nutrient pollutants (e.g., TN and TP) discharged into the waters will not only fluctuate greatly with different water regimes due to seasonal changes [18,19] but also show great spatial variability due to the impact of the surrounding environment of lakes and reservoirs [1,20]. The distribution of nutrients in lakes and reservoirs [21] and the differences of environmental factors such as water temperature [22] and pH [23] will further affect the composition and distribution of planktonic algae community [24].…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Variations of Water Quality and Planktonic Algal Communities in Qingshan Reservoir, China

Yan¹,

Xu²,

Yang³

et al. 2023

Pol. J. Environ. Stud.

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Based on the monitoring data of conventional water quality in Qingshan Reservoir from 2018 to 2019, principal component analysis (PCA) and comprehensive nutritional status index (TLI) are used to evaluate water quality, planktonic algal communities, and eutrophication degree of Qingshan reservoir. The results showed that: 1) from 2018 to 2019, the annual average TLI is 56.54, indicating that the reservoir is in a slightly eutrophic state, which is conducive to algae growth; 2) the water quality of Qingshan Reservoir has obvious temporal and spatial variability: the water environment quality commonly decreased in the order winter>spring>autumn>summer, and exit zone>buffer zone>entry zone; meanwhile, the algal biomass in summer and autumn was significantly higher than that in spring and winter, and most of the algae were concentrated in the surface water except in January and decreased with the increase of depth; And related to the water quality environment, the biomass of cyanobacteria and green algae in Qingshan Reservoir is relatively high in summer, while diatom is the dominant species in spring and winter. We come to the conclusion that targeting at region and time will be more effective for the treatment of reservoir eutrophication.

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“…In river ecosystems, environmental and biological factors act at multiple spatial and temporal scales, influencing the distribution patterns of aquatic biodiversity. In this regard, most studies on aquatic macroinvertebrates focus on large spatial and temporal scales [1][2][3], and only few on smaller scales [4,5]. Ecological or hydrological processes acting at larger scales shape smaller-scale habitats, resulting in a nested hierarchy of interconnected habitats where species become more and more specialised as habitat conditions become site-specific [6].…”

Section: Introductionmentioning

confidence: 99%

Habitat Suitability Curves for Freshwater Macroinvertebrates of Tropical Andean Rivers

Vázquez

Vimos-Lojano

Hampel

2020

Water

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Sustainable river management requires a thorough understanding of the response of aquatic biota to riverine microhabitat variability. The purpose of this study was to assess macroinvertebrate hydraulic-habitat suitability in Ecuadorian Andean rivers to support habitat modelling for sustainable ecosystem management. 597 macroinvertebrate samples were collected from ten sampling stations the Yanuncay River, Ecuador. Physical, chemical, hydraulic and habitat variables were measured/calculated. Froude number, Reynolds number, substrate index and algae coverage were major drivers of macroinvertebrate response, and were used to develop suitability curves for Baetodes, Andesiops, Camelobaetidius, Ecuaphlebia, Anacroneuria, Atopsyche, Simulium and Palpomyia using General Additive Models. Standardised density contours of taxa as functions of hydraulic and habitat variables were also developed. Taxonomic response was related to body structures/shapes and feeding habits. Baetodoes, Simulium, Anacroneuria and Atopsyche preferred fast flowing waters, and thus, they could be significantly affected in case of flow reduction. Similar habitat suitability curves were developed from the main river and the tributaries, possibly due to the short distance between the sampling stations. This study fills a major knowledge gap by developing macroinvertebrate habitat suitability curves for future physical habitat simulations and environmental flow assessments in the Andean region.

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Spatio-temporal critical source area patterns of runoff pollution from agricultural practices in the Colombian Andes

Cited by 12 publications

References 42 publications

Assessment of groundwater quality for human consumption and its health risks in the Middle Magdalena Valley, Colombia

Assessment of groundwater quality for human consumption and its health risks in the Middle Magdalena Valley, Colombia

Spatio-Temporal Variations of Water Quality and Planktonic Algal Communities in Qingshan Reservoir, China

Habitat Suitability Curves for Freshwater Macroinvertebrates of Tropical Andean Rivers

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