Impacts of urban headwater disturbances on downstream sediment loading where streamside management zones for forest harvesting activities are present downstream

Cavus, Ilkim; Kalin, Latif; Kara, Ferhat

doi:10.1016/j.ijsrc.2017.04.003

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…For these rivers, elevated Al concentrations occur in the winter months and coincide with turbidity peaks. The source of these turbidity-driven Al peaks is likely anthropogenic activity within the catchments, which is associated with increased disturbance and runoff erosion. , …”

Section: Resultsmentioning

confidence: 99%

“…59 Anthropogenic land use is significantly positively correlated with riverine turbidity levels (Table 4). Anthropogenic land use typically increases soil disturbance and reduces forest cover, both of which can lead to increased runoff erosion, 59,60 resulting in elevated turbidity. Forest cover has moderate negative correlations with base cation concentrations (Table 4).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The source of these turbidity-driven Al peaks is likely anthropogenic activity within the catchments, which is associated with increased disturbance and runoff erosion. 59,60 Due to low particulate loads in most rivers across Nova Scotia, total fractions are often used as proxies for dissolved fractions, especially for TOC and DOC. 7 However, the high turbidity in our winter regime sites highlights that unfiltered samples should not be used as a proxy for dissolved load in these rivers.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Five Aluminum Seasonality Regimes Identified in Chronically Acidified Rivers of Nova Scotia

Rotteveel

Sterling

2019

Environ. Sci. Technol.

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Despite reductions in acidic deposition, high freshwater Al concentrations continue to threaten acidified ecosystems across the northern hemisphere. Seasonally elevated Al concentrations may pose a particular threat to freshwater organisms. Despite this threat, there is a lack of understanding about the timing and drivers of seasonal Al fluctuations. Here, we address this knowledge gap by identifying seasonal patterns of Al and their drivers in 16 rivers across Nova Scotia, Canada. We identify five distinct Al regimes with different timing of seasonally elevated Al concentrations. Regimes are distinguished by correlation strength and direction between Al and base cations, total organic carbon, turbidity, and discharge. Most notably, regimes are distinguished by a gradient of Al–base cation decoupling as Ca and Mg concentration approaches 1.4 mg L–1 and 0.6 mg L–1, respectively. Seasonally elevated Al concentrations exceeded the 0.1–0.2 mg L–1 World Health Organization drinking water guidelines in all regimes, and inorganic monomeric Al is projected to exceed the 15 μg L–1 threshold for aquatic health in most rivers. This research highlights the complexity of seasonal Al dynamics and the importance of understanding seasonal variation of Al to quantify the impact of Al on human health, water treatment, and aquatic organisms.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%