Urbanization Impacts Dissolved Organic Matter Concentration and Quality in a Southeastern United States Watershed

ACS ES&T Water, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 22, 2025

Blackwater rivers are named due to their exceptionally high concentrations of chromophoric dissolved organic matter (CDOM). They the predominant lotic ecosystem in United States Southeastern Coastal Plain, a region experiencing some nation's highest rates development. This study assessed variability DOM concentration and composition across forested urbanized blackwater systems coastal South Carolina, U.S. Dissolved carbon nutrient as well absorbance fluorescence optical properties reveal that urban sites have lower concentrations, elemental ratios, less complex DOM. In contrast, an order magnitude higher, elevated molecular size dominated by refractory terrestrial-like Urban were observed more similar brown water than rural systems. These findings suggest urbanization ecosystems results export simpler, labile DOM, potentially lowering oxygen increasing atmospheric emissions other negative impacts. To protect systems, baseline must be established decipher impacts on quality naturally occurring versus anthropogenic activities properly assign classifications these diverse

Language: Английский

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Intra-annual and ecoregional differences in physico-chemical data between blackwater and non-blackwater streams in the coastal plains of South Carolina

Frontiers in Water, Journal Year: 2025, Volume and Issue: 7

Published: Feb. 26, 2025

In the coastal plains of southeastern United States, blackwater streams are relatively common. South Carolina, many naturally occurring have been identified over decades water monitoring, particularly when they fail to meet chemistry expectations originally set based on non-blackwater streams. The Carolina Department Environmental Services has collected extensive, often monthly, data from both and systems throughout Southeastern Plains (SEP) Middle Atlantic Coastal Plain (MACP) ecoregions. Using these data, we compared seasonal patterns in parameters between Examining monthly ecoregions site types (blackwater vs. non-blackwater), observed that pH, total alkalinity, phosphorus differed by ecoregion type. For parameters, however, differences were stronger than any This work certain can distinguish streams, but it also shown even within one state, not a monolith. They vary underlying characteristics broader region which located. results this research relevant entire SEP MACP jointly include parts 11 U.S. states. Results likely other rivers contiguous States globally, extent relevance will require additional research. From management perspective, demonstrated Omernik Level III offer scale-appropriate means grouping similar conducive management. framework supports collaborative exchange information across political boundaries. includes globally among entities with homologous

Language: Английский

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In‐situ measurement of dissolved organic carbon and total organic carbon in fresh surface waters: Lab validation of a portable field meter

River Research and Applications, Journal Year: 2024, Volume and Issue: unknown

Published: June 30, 2024

Abstract Nonliving organic matter, including carbon, in freshwater systems provides energy inputs to food webs and supports various ecosystem functions. Unusually high carbon levels can occur naturally aquatic habitats such as wetlands blackwater rivers streams. However, values may also be due anthropogenic influences. In recent years, increasing of have been observed suggested drivers brownification increased observation foam on surface waters. Total (TOC) dissolved (DOC) are not commonly included field studies ecosystems because sampling logistics resources required for laboratory measurement. As a potential alternative analysis, we evaluated the effectiveness portable meter by comparing results data collected situ. Comparisons were made at 43 water sites across northern West Virginia. At each these sites, measurement was recorded using Real TOC/DOC Field Meter, sample transported Shimadzu TOC‐V analyzer. Data from site compared bivariate analysis concordance correlation matched pairs. Poor agreement existed between lab measurements, so novel model created laboratory‐derived further comparison. Substantial accuracy achieved new model. This suggests that Meter is viable instrument aid monitoring management decisions.

Language: Английский

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Influence of Physiographic Region on Pathogen Concentrations Between Stream Types

Water, Journal Year: 2024, Volume and Issue: 16(22), P. 3218 - 3218

Published: Nov. 8, 2024

Predicting public health risk associated with exposure to and recreational use of surface waters is often challenging due substantial variability in concentrations pathogenic bacteria, even among seemingly similar streams. In this study, we document significant differences the water common bacteria indicators Escherichia coli fecal coliform between two major stream types—blackwater redwater streams (p < 0.001). We propose present evidence that these findings result from natural biogeochemical variation physiographic regions These suggest type may influence degree waterborne pathogens disease. Future research needed assess whether inclusion assessments can improve modeling mapping.

Language: Английский

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Groundwater Quality Variations during Wet and Dry Seasons in Agricultural and Forested Areas in the Philippines

Water Resources, Journal Year: 2024, Volume and Issue: 51(S2), P. S293 - S305

Published: Dec. 1, 2024

Language: Английский

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