scholarly journals High Water: Prolonged Flooding on the Deltaic Mississippi River

Eos ◽  
2020 ◽  
Vol 101 ◽  
Author(s):  
Nicole Gasparini ◽  
Brendan Yuill
Keyword(s):  
Land Use ◽  
Mississippi River ◽  
Management Practices ◽  
High Water ◽  
Changing Climate ◽  
Lower Mississippi River ◽  
Land Use Practices

Changing climate and land use practices are bringing extended periods of high water to the lower Mississippi River. New management practices are needed to protect people, industry, and the land.

scholarly journals Carbon Dioxide Emissions as Affected by Alternative Long-Term Irrigation and Tillage Management Practices in the Lower Mississippi River Valley

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
S. F. Smith ◽  
K. R. Brye
Keyword(s):  
Carbon Dioxide ◽  
Soil Respiration ◽  
Mississippi River ◽  
Management Practices ◽  
River Valley ◽  
Mississippi River Valley ◽  
Growing Seasons ◽  
Lower Mississippi River ◽  
Lower Mississippi River Valley

Ensuring the sustainability of cultivated soils is an ever-increasing priority for producers in the Lower Mississippi River Valley (LMRV). As groundwater sources become depleted and environmental regulations become more strict, producers will look to alternative management practices that will ensure the sustainability and cost-effectiveness of their production systems. This study was conducted to assess the long-term (>7 years) effects of irrigation (i.e., irrigated and dryland production) and tillage (conventional and no-tillage) on estimated carbon dioxide (CO2) emissions from soil respiration during two soybean (Glycine maxL.) growing seasons from a wheat- (Triticum aestivumL.-) soybean, double-cropped production system in the LMRV region of eastern Arkansas. Soil surface CO2fluxes were measured approximately every two weeks during two soybean growing seasons. Estimated season-long CO2emissions were unaffected by irrigation in 2011 (P>0.05); however, during the unusually dry 2012 growing season, season-long CO2emissions were 87.6% greater (P=0.044) under irrigated (21.9 Mg CO2ha−1) than under dryland management (11.7 Mg CO2ha−1). Contrary to what was expected, there was no interactive effect of irrigation and tillage on estimated season-long CO2emissions. Understanding how long-term agricultural management practices affect soil respiration can help improve policies for soil and environmental sustainability.

scholarly journals Impact of changing land use practices on nitrate export by the Mississippi River

2004 ◽  
Vol 18 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
Simon D. Donner ◽  
Christopher J. Kucharik ◽  
Jonathan A. Foley
Keyword(s):  
Land Use ◽  
Mississippi River ◽  
Nitrate Export ◽  
Land Use Practices

Urban Land Use, Water Quality, and Biological Conditions in the Lower Mississippi River Basin Bayous

Fisheries ◽  
2015 ◽  
Vol 40 (7) ◽  
pp. 334-335 ◽  
Author(s):  
Yushun Chen ◽  
Kathryn Herzog ◽  
Sagar Shrestha ◽  
Daniel Grigas ◽  
John Farrelly ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
River Basin ◽  
Mississippi River ◽  
Urban Land ◽  
Urban Land Use ◽  
Mississippi River Basin ◽  
Lower Mississippi River

scholarly journals The “Problem” of New Orleans and Diminishing Sustainability of Mississippi River Management—Future Options

Water ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 813
Author(s):  
John W. Day ◽  
Rachael Hunter ◽  
G. Paul Kemp ◽  
Matthew Moerschbaecher ◽  
Christopher G. Brantley
Keyword(s):  
New Orleans ◽  
Mississippi River ◽  
Coastal Wetlands ◽  
High Water ◽  
City Management ◽  
The Future ◽  
Lower Mississippi River ◽  
Coastal Louisiana ◽  
The City ◽  
Precipitation Events

Climate change forcings are having significant impacts in coastal Louisiana today and increasingly affect the future of New Orleans, a deltaic city mostly below sea level, which depends on levee and pumps to protect from a host of water-related threats. Precipitation has increased in the Mississippi River basin generally, increasing runoff, so that in recent years the Mississippi River has been above flood stage for longer periods of time both earlier and later in the year, increasing the likelihood that hurricane surge, traditionally confined to summer and fall, may compound effects of prolonged high water on river levees. The Bonnet Carré Spillway, just upstream of New Orleans has been operated more often and for longer periods of time in recent years than ever before in its nearly 100-year history. Because all rain that falls within the city must be pumped out, residents have been exposed to interior flooding more frequently as high-intensity precipitation events can occur in any season. A sustainable path for New Orleans should involve elevating people and sensitive infrastructure above flood levels, raising some land levels, and creating water storage areas within the city. Management of the lower Mississippi River in the future must include consideration that the river will exceed its design capacity on a regular basis. The river must also be used to restore coastal wetlands through the use of diversions, which will also relieve pressure on levees.

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