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(1999)
Reducing nutrient loads, especially nitrate-nitrogen, to surface water, ground water & the Gulf of Mexico – Identifies and evaluates methods to reduce nutrient loads to surface water, ground
W. Mitsch, J. Day, J. Gilliam, P. Groffman, D. Hey, G. Randall, Naiming Wang (2001)
Reducing Nitrogen Loading to the Gulf of Mexico from the Mississippi River Basin: Strategies to Counter a Persistent Ecological Problem, 51
D. Goolsby, W. Battaglin, B. Aulenbach, Richard Hooper (2001)
Nitrogen input to the Gulf of Mexico.Journal of environmental quality, 30 2
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Surface water and sediment inflow and outflow for the Atchafalaya River Basin
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The Water EncyclopediaNuclear Technology, 12
(1999)
Nitrogen losses in water flowing through Louisiana swamps, In Rozas, L
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Soil survey of St. Martin Parish, Louisiana
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Treatment wetlands database now available
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Consequences of the 1993 Mississippi River flood in the Gulf of MexicoRegulated Rivers-research & Management, 14
D. Boesch (2002)
Challenges and opportunities for science in reducing nutrient over-enrichment of coastal ecosystemsEstuaries, 25
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Coastal Hypoxia: Consequences for Living Resources and Ecosystems. Coastal and Estuarine Studies 58
J. T. Watson, S. C. Reed, R. H. Kadlec, R. L. Knight, A. E. Whitehouse (1989)
Constructed Wetlands for Wastewater Treatment
P. Soranno, S. Hubler, S. Carpenter, R. Lathrop (1996)
Phosphorus Loads to Surface Waters: A Simple Model to Account for Spatial Pattern of Land UseEcological Applications, 6
D. Knight (2018)
Numerical Terradynamic Simulation Group 2-1985 Water and Nutrient Outflow From Contrasting Lodgepole Pine Forests in Wyoming
N. Rabalais, R. Turner, D. Justić, Q. Dortch, W. Wiseman, B. Gupta, D. Justić (1996)
Nutrient changes in the Mississippi River and system responses on the adjacent continental shelfEstuaries, 19
B. Arheimer, H. Wittgren (1994)
Modelling the effects of wetlands on regional nitrogen transportAMBIO: A Journal of the Human Environment, 23
R. H. Kadlec, R. L. Knight (1996)
Treatment Wetlands
S. Nixon, V. Lee (1986)
Wetlands and Water Quality. A Regional Review of Recent Research in the United States on the Role of Freshwater and Saltwater Wetlands as Sources, Sinks, and Transformers of Nitrogen, Phosphorus, and Various Heavy Metals.
D. Goolsby, W. Battaglin, G. Lawrence, R. Artz, B. Aulenbach, R. Hooper, D. Keeney, G. Stensland (1999)
Flux and Sources of Nutrients in the Mississippi-Atchafalaya River Basin
(1999)
Hypoxia solution through wetland restoration in America’s breadbasket
(1993)
Database: North American wetlands for water quality treatment
N. Rabalais, R. Turner, D. Scavia (2002)
Beyond Science into Policy: Gulf of Mexico Hypoxia and the Mississippi River, 52
Kevin Devito, Peter Dillon, B. Lazerte (1989)
Phosphorus and nitrogen retention in five Precambrian shield wetlandsBiogeochemistry, 8
S. Donner, M. Coe, J. Lenters, T. Twine, J. Foley (2002)
Modeling the impact of hydrological changes on nitrate transport in the Mississippi River Basin from 1955 to 1994Global Biogeochemical Cycles, 16
D. Dunn (1996)
Trends in nutrient inflows to the Gulf of Mexico from streams draining the conterminous United States, 1972-93Water-Resources Investigations Report
D. H. Knight, T. J. Fahey, S. W. Running (1985)
Factors affecting water and nutrient outflow from lodgepole pine forests in WyomingEcological Monographs, 55
S. Donner, C. Kucharik, M. Oppenheimer (2004)
The influence of climate on in‐stream removal of nitrogenGeophysical Research Letters, 31
C. Demas, Sebastian Brazelton, N. Powell (2002)
The Atchafalaya Basin : river of trees
J. Watson, S. Sherwood, R. Kadlec, Russell Knight, A. Whitehouse (2020)
Performance Expectations and Loading Rates for Constructed Wetlands
Freshwater diversions from the lower Mississippi River into the region’s wetlands have been considered an alternative means for reducing nitrogen loading. The Atchafalaya River Swamp, the largest freshwater swamp in North America, carries the entire discharge of the Red River and 30% of the discharge of the Mississippi River, but it is largely unknown how much nitrogen actually can be retained from the overflowing waters of the Mississippi–Atchafalaya River system. Nitrogen discharge from the upper Mississippi River Basin has been implicated as the major cause for the hypoxia in the Northern Gulf of Mexico, which threatens not only the aquatic ecosystem health, but also Louisiana’s fishery industry, among other problems. This study was conducted to determine the change in organic nitrogen mass as water flows through the Atchafalaya River Swamp and into the Gulf of Mexico. By utilizing the river’s long-term discharge and water quality data (1978–2002), monthly and annual organic nitrogen fluxes were quantified, and their relationships with the basin’s hydrologic conditions were investigated. A total Kjeldahl nitrogen (TKN) mass input–output balance between the upstream (Simmesport) and downstream (Morgan City and Wax Lake Outlet) locations was established to examine the organic nitrogen removal potential for this large swamp. The results showed that on average, TKN input into the Atchafalaya was 200 323 tons year−1 and TKN output leaving the basin was 145 917 tons year−1, resulting in a 27% removal rate of organic nitrogen. Monthly TKN input and output in the basin were highest from March to June (input vs. output: 25 000 vs. 18 000 tons month−1) and lowest from August to November (8000 vs. 6000 tons month−1). There was a large variation in both annual and inter-annual organic nitrogen removals. The variability was positively correlated with the amount of inflow water at Simmesport, suggesting that regulating the river’s inflow at the Old River flood control structures may help reduce nitrogen loading of the Mississippi River to the Gulf of Mexico. Furthermore, the in-stream loss of organic nitrogen indicates that previous studies may have overestimated nitrogen discharge from the Mississippi–Atchafalaya River system.
Hydrobiologia – Springer Journals
Published: Oct 7, 2005
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