Relative Phosphorus Load Inputs from Wastewater Treatment Plants in a Northern Colorado Watershed

Son, Ji-Hee; Cowley, Cortney; Goodwin, Stephen; Arabi, Mazdak; Carlson, Kenneth

doi:10.2134/jeq2012.0349

Cited by 4 publications

(2 citation statements)

References 23 publications

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“…In the United States, water quality impacts from point sources (such as industrial effluent or wastewater treatment) have generally improved [Carpenter et al, 1998]. "Nonpoint" inputs are the majority of nutrient inputs to rivers [Carpenter et al, 2009;Son et al, 2013], but have proved extremely difficult to control through regulatory means [e.g., Jones, 2014]. Restoration, rehabilitation, or conservation of the river corridor (which we subsequently call "river corridor protection") is one approach government agencies and non-governmental organizations have used to try to control nonpoint nutrient loading to rivers [Wohl et al, 2015].…”

Section: Introductionmentioning

confidence: 99%

Phosphorus in the river corridor

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Wohl

Arabi

2016

Earth-Science Reviews

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River corridor protection has been adopted by government agencies and non-governmental organizations to try to control nonpoint nutrient loading to rivers. Yet, river corridor protection and modeling strategies developed on a national basis may not fully account for dynamics that have proven to be important controls on phosphorus in river corridors. These sources of uncertainty may have economic and environmental costs, yet we know of no previous works that have proposed a broad conceptual model of phosphorus dynamics in river corridors. In this review, we develop a conceptual model of phosphorus in the river corridor under natural conditions based on existing research by: (i) evaluating how processes and controls vary among distinct landscape characteristics and among distinct segments within river networks (e.g., in confined channels versus wide valleys); and (ii) determining whether some processes and controls are generally more dominant for some landscape types and river reaches. Finally, we provide an example application of the conceptual model, and identify key areas for future research. The review suggests that phosphorus dynamics in the river corridor, and their controls, may vary substantially across different landscape types and river reaches. However, the conceptual model outlined here illustrates how certain characteristics of landscape type, and abundance, transport, and transformation of phosphorus and reactive compounds, may help to predict important river corridor phosphorus dynamics. Use of this conceptual model can better inform numerical modeling of phosphorus dynamics and management of river corridors.

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Section: Introductionmentioning

confidence: 99%

Phosphorus in the river corridor

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Wohl

Arabi

2016

Earth-Science Reviews

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“…Escalation in mobilized pollutants can cause eutrophication of surface water bodies and other water quality concerns (Ergas et al 2010;Morgan et al 2012;Son et al 2013). Consequently, stormwater runoff volumes and pollutant loadings are increased.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Denitrification in Bioretention Using Woodchips as an Organic Carbon Source

Peterson

Igielski

Davis

2015

J. Sustainable Water Built Environ.

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Bioretention systems fundamentally lack the ability to effectively reduce total nitrogen concentrations from urban stormwater. Column tests were conducted to simulate a bioretention anoxic zone and evaluate the effects of stormwater retention time, limestone addition, and woodchip species, size, and mass percentage on the bioretention denitrification process. Denitrification of an artificial stormwater was demonstrated and appeared to follow first-order kinetics. A 0.8-day average retention time showed the highest nitrate removal percentage of 82.4 AE 0.4%. Willow Oak and Red Maple woodchips resulted in the highest total nitrogen removal efficiencies at 61.9 AE 0.8% and 61.8%, respectively; Wild Cherry, Virginia Pine, and American Beech were less effective. Smaller woodchips and higher woodchip mass percentage corresponded to greater nitrate removal efficiencies, but also higher organic nitrogen leaching. Media containing 4.5% 5-mm Willow Oak woodchips by mass represented optimum conditions. Adding limestone to raise the pH did not increase denitrification rates. Installing a first flush bioretention denitrification zone may represent a way to incorporate the longer retention times needed for denitrification.

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Massive land system changes impact water quality of the Jhelum River in Kashmir Himalaya

Rather

Rashid

Shahi

et al. 2016

Environ Monit Assess

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The pristine aquatic ecosystems in the Himalayas are facing an ever increasing threat from various anthropogenic pressures which necessitate better understanding of the spatial and temporal variability of pollutants, their sources, and possible remedies. This study demonstrates the multi-disciplinary approach utilizing the multivariate statistical techniques, data from remote sensing, lab, and field-based observations for assessing the impact of massive land system changes on water quality of the river Jhelum. Land system changes over a period of 38 years have been quantified using multi-spectral satellite data to delineate the extent of different anthropogenically driven land use types that are the main non-point sources of pollution. Fifteen water quality parameters, at 12 sampling sites distributed uniformly along the length of the Jhelum, have been assessed to identify the possible sources of pollution. Our analysis indicated that 18% of the forested area has degraded into sparse forest or scrublands from 1972 to 2010, and the areas under croplands have decreased by 24% as people shifted from irrigation-intensive agriculture to orchard farming while as settlements showed a 397% increase during the observation period. One-way ANOVA revealed that all the water quality parameters had significant spatio-temporal differences (p < 0.01). Cluster analysis (CA) helped us to classify all the sampling sites into three groups. Factor analysis revealed that 91.84% of the total variance was mainly explained by five factors. Drastic changes in water quality of the Jhelum since the past three decades are manifested by increases in nitrate-nitrogen, TDS, and electric conductivity. The especially high levels of nitrogen (858 ± 405 μgL(-1)) and phosphorus (273 ± 18 μgL(-1)) in the Jhelum could be attributed to the reckless application of fertilizers, pesticides, and unplanned urbanization in the area.

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Relative Phosphorus Load Inputs from Wastewater Treatment Plants in a Northern Colorado Watershed

Cited by 4 publications

References 23 publications

Phosphorus in the river corridor

Phosphorus in the river corridor

Enhanced Denitrification in Bioretention Using Woodchips as an Organic Carbon Source

Massive land system changes impact water quality of the Jhelum River in Kashmir Himalaya

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