Salinization of stream water and groundwater at daily to decadal scales in a temperate climate DOI Creative Commons
Michelle D. Shattuck, Hannah M. Fazekas, Adam S. Wymore

et al.

Limnology and Oceanography Letters, Journal Year: 2023, Volume and Issue: 8(1), P. 131 - 140

Published: Jan. 9, 2023

Abstract Elevated salt concentrations in streams draining developed watersheds are well documented, but the effects of hydrologic variability and role groundwater surface water salinization poorly understood. To characterize these effects, we use long‐term data (12–19 yr) high‐frequency specific conductance (SPC) collected from 13 across New Hampshire, USA. Concentration–discharge ( C – Q ) relationships for chloride (Cl − derived SPC showed distinct seasonal variability. Diluting behavior was common, flushing occurred autumn winter, suggesting that both runoff contribute salts to streams. Long‐term show although extreme flood events initially reduced rural streams, recovered preflood conditions about a decade. Chronic Cl exceedances urban during all seasons. This research suggests variation stream flow, application deicing agents play freshwater salinization.

Language: Английский

Global river water quality under climate change and hydroclimatic extremes DOI
Michelle T. H. van Vliet, Josefin Thorslund, Maryna Strokal

et al.

Nature Reviews Earth & Environment, Journal Year: 2023, Volume and Issue: 4(10), P. 687 - 702

Published: Sept. 12, 2023

Language: Английский

Citations

148
In situ fluorescence measurements of dissolved organic matter: A review DOI
Elfrida M. Cârstea, Cristina L. Popa, Andy Baker

et al.

The Science of The Total Environment, Journal Year: 2019, Volume and Issue: 699, P. 134361 - 134361

Published: Sept. 10, 2019

Language: Английский

Citations

142
Prediction of stream nitrogen and phosphorus concentrations from high-frequency sensors using Random Forests Regression DOI Creative Commons
Joel W. Harrison, Mark A. Lucius,

Jeremy L. Farrell

et al.

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 763, P. 143005 - 143005

Published: Oct. 20, 2020

Language: Английский

Citations

85
Dissolved organic nitrogen in wastewater treatment processes: Transformation, biosynthesis and ecological impacts DOI
Zheng Fang, Jie Wang, Rui Xiao

et al.

Environmental Pollution, Journal Year: 2021, Volume and Issue: 273, P. 116436 - 116436

Published: Jan. 8, 2021

Language: Английский

Citations

74
Land Use Overrides Stream Order and Season in Driving Dissolved Organic Matter Dynamics Throughout the Year in a River Network DOI
Ashley A. Coble, Adam S. Wymore, Jody D. Potter

et al.

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(3), P. 2009 - 2020

Published: Jan. 10, 2022

Anthropogenic land use has increased nutrient concentrations and altered dissolved organic matter (DOM) character its bioavailability. Despite widespread recognition that DOM reactivity can vary temporally, the relative influence of stream order on characteristics is poorly understood across seasons entire flow regime. We examined 28-day bioavailable carbon (BDOC) a river network to determine roles in driving variability bioavailability throughout year. 1st-order streams was distinct from higher orders with lower DOC concentrations, less aromatic (specific ultraviolet absorbance at 254 nm (SUVA254)), more autochthonous (fluorescence index), recently produced (β/α) DOM. Across all months, primarily explained by use, rather than or season. Land most variation transitional winter months least during dry months. BDOC greater watersheds (SUVA254) recent allochthonous development impervious surface. With continued development, smallest impacted expected increase.

Language: Английский

Citations

44
A comprehensive review of catchment water quality monitoring using a tiered framework of integrated sensing technologies DOI Creative Commons

Joyce O’Grady,

Dian Zhang, Noel E. O׳Connor

et al.

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 765, P. 142766 - 142766

Published: Oct. 5, 2020

Due to the growing threat of climate change, new advances in water quality monitoring strategies are needed now more than ever. Reliable and robust practices can be used improve better understand catchment processes affecting quality. In recent years deployment long term in-situ sensors has increased temporal spatial data being obtained. Furthermore, development research into remote sensing using satellite aerial imagery been incrementally integrated catchments for areas that previously might have impossible monitor, producing high-resolution become imperative monitoring. The use modelling relevant as it enables prediction events before they occur so strategic plans put place deal with or prevent certain threats. This review highlights approaches employed currently examines potential integration these methods. A framework incorporate all obtain information about a its future will involve satellite, air borne devices analytics playing key role providing decision support tools. provides examples successful individual technologies, some combined identifies gaps should filled achieve an ideal observation system.

Language: Английский

Citations

52
The increasing water clarity of Tibetan lakes over last 20 years according to MODIS data DOI Creative Commons
Chong Liu, Liping Zhu, Junsheng Li

et al.

Remote Sensing of Environment, Journal Year: 2020, Volume and Issue: 253, P. 112199 - 112199

Published: Nov. 27, 2020

Language: Английский

Citations

52
Dissolved Organic Carbon and Nitrate Concentration‐Discharge Behavior Across Scales: Land Use, Excursions, and Misclassification DOI Creative Commons
Hannah M. Fazekas, Adam S. Wymore, William H. McDowell

et al.

Water Resources Research, Journal Year: 2020, Volume and Issue: 56(8)

Published: Aug. 1, 2020

Abstract High‐frequency in situ sensors have enabled researchers to measure solute concentrations at a time scale that captures the variability stream discharge. We analyzed discrete samples and high‐frequency series of solutes characterize how nitrate (NO 3 − ) fluorescent dissolved organic matter (fDOM; proxy for carbon) respond changes discharge annual intra‐annual timescales across network New Hampshire, USA. NO fDOM exhibited highly variable concentration‐discharge (c‐Q) behavior scales. Transport limitation, source chemostatic were observed occur within among years all our study watersheds. Annual assessment c‐Q misclassified streams 31% time, as step missed seasonal event‐induced shifts dynamics. In some instances, anomalous events lasting less than 5% year determine site. Catchment land use appeared drive watersheds relationships their temporal variability. Forested had draining with more development greater behavior. Sample frequency impacts hydrologic systems are characterized extrapolating from alone can bias interpretations dynamics understanding transport.

Language: Английский

Citations

45
Effects of Reversal of Water Flow in an Arctic Floodplain River on Fluvial Emissions of CO2 and CH4 DOI
Karel Castro‐Morales,

Anna Canning,

Arne Körtzinger

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2021, Volume and Issue: 127(1)

Published: Dec. 23, 2021

Abstract When organic matter from thawed permafrost is released, the sources and sinks of greenhouse gases (GHGs), like carbon dioxide (CO 2 ) methane (CH 4 in Arctic rivers will be influenced future. However, temporal variation, environmental controls, magnitude riverine GHGs are largely unknown. We measured situ high resolution concentrations CO , CH oxygen (O Ambolikha River northeast Siberia between late June early August 2019. During this period, supersaturated decreased steadily by 90% 78%, respectively, while O increased 22% were driven decreasing water temperature. Estimated gas fluxes indicate that during 2019, significant emissions sustained, possibly external terrestrial flooding, or due to lateral exchange with gas‐rich downstream‐flowing water. In July August, river reversed its flow constantly limited at site. The composition dissolved microbial communities analyzed discrete samples also revealed a shift. Furthermore, cumulative total (36.8 gC‐CO m −2 nearly five times lower than uptake adjacent floodplain. Emissions (0.21 gC‐CH 16 floodplain emissions. Our study hydraulic connectivity land freshet, reversing directions streams summer, regulate replenishment

Language: Английский

Citations

35
Strong Dynamics in Tidal Marsh DOC Export in Response to Natural Cycles and Episodic Events From Continuous Monitoring DOI Creative Commons
Alana Menendez, Maria Tzortziou, Patrick J. Neale

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2022, Volume and Issue: 127(7)

Published: June 17, 2022

Abstract The role of tidal wetlands as hotspots for carbon and nutrient exchange with adjacent waters has been well documented, but large uncertainties remain regarding the physical biogeochemical controls on these fluxes, which have significant implications coastal cycling budgets. This study elucidates variability in lateral wetland dissolved organic (DOC) fluxes tidally, seasonally, during extreme weather events a brackish within sub‐estuary northwestern Chesapeake Bay, USA. Continuous from wetland‐draining creek were calculated based DOC concentrations ([DOC]) estimated using optical physicochemical properties measured situ concurrent water flow data. Mean export was found to be 8.59 (±1.20) kg C ( n = 1,128) cycle −1 annual flux 200.66 (±28.09) g m −2 yr . Peaks associated Hurricane Joaquin 2015, where just two cycles accounted ∼5% export. Analysis quality measurements reveal seasonal dependencies. Highest [DOC] largest low versus high tide differences observed summer, corresponding more fresh plant biomass its mobilization, consistent results Fourier transform ion cyclotron resonance mass spectrometry. Despite summer highs [DOC], monthly greatest early fall due higher flows. presented here is than previously reported this system, highlighting importance continuous monitoring under wide range environmental conditions.

Language: Английский

Citations

23