2020
DOI: 10.5194/bg-2020-311
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Effects of land use and water quality on greenhouse gas emissions from an urban river system

Abstract: Abstract. Rivers act as a natural source of greenhouse gases (GHGs) that can be released from the metabolisms of aquatic organisms. Anthropogenic activities can largely alter the chemical composition and microbial communities of rivers, consequently affecting their GHG emissions. To investigate these impacts, we assessed the emissions of CO2, CH4, and N2O from Cuenca urban river system (Ecuador). High variation of the emissions was found among river tributaries that mainly depended on water quality and neighbo… Show more

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Cited by 7 publications
(6 citation statements)
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“…The average CO 2 flux in the River Kelvin was greater than in the Cuenca urbanized river basin in Ecuador (tropical climate, 3.28 ± 0.61 g C·m −2 ·d −1 from sites close to urban area (Ho et al, 2020), Table 5). In Cuenca River, DO may be the most important limitation on CO 2 concentration, as the lower DO concentration (<5.6 mg·L −1 ) may restrict the respiration rate.…”
Section: Discussionmentioning
confidence: 95%
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“…The average CO 2 flux in the River Kelvin was greater than in the Cuenca urbanized river basin in Ecuador (tropical climate, 3.28 ± 0.61 g C·m −2 ·d −1 from sites close to urban area (Ho et al, 2020), Table 5). In Cuenca River, DO may be the most important limitation on CO 2 concentration, as the lower DO concentration (<5.6 mg·L −1 ) may restrict the respiration rate.…”
Section: Discussionmentioning
confidence: 95%
“…However, CH 4 emission from the River Kelvin was much lower than from the Adyar River (Table 5) in India (Nirmal Rajkumar et al, 2008), which is highly-polluted because of extensive and unregulated domestic developments. The global warming potential of rivers increases sharply as river water quality degrades due to pollution (Ho et al, 2020). The Adyar River experienced severe hypoxia (DO: 31.4 ± 17.7%) and eutrophication in the watershed, making the river a zone of CH 4 production.…”
Section: Gas Emissions and Dissolved Carbon Exports To Outletmentioning
confidence: 99%
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