Brackish marshes erode twice as fast as saline marshes in the Mississippi Delta region

2021 ◽  
Author(s):  
Kendall Valentine ◽  
Grayton Bruno ◽  
Tracy Elsey‐Quirk ◽  
Giulio Mariotti
Keyword(s):  
Mississippi Delta ◽  
Delta Region ◽  
Brackish Marshes

scholarly journals Assessment of Factors Contributing to Health Outcomes in the Eight States of the Mississippi Delta Region

2016 ◽  
Vol 13 ◽  
Author(s):  
Keith P. Gennuso ◽  
Amanda Jovaag ◽  
Bridget B. Catlin ◽  
Matthew Rodock ◽  
Hyojun Park
Keyword(s):  
Health Outcomes ◽  
Mississippi Delta ◽  
Delta Region

scholarly journals Evaluation of Different Crop Models for Simulating Rice Development and Yield in the U.S. Mississippi Delta

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1905
Author(s):  
Sanai Li ◽  
David Fleisher ◽  
Dennis Timlin ◽  
Vangimalla R. Reddy ◽  
Zhuangji Wang ◽  
...  
Keyword(s):  
Decision Support ◽  
Mississippi Delta ◽  
Rice Yield ◽  
Growing Season ◽  
The United States ◽  
Delta Region ◽  
Growth Duration ◽  
Cold Temperatures ◽  
Crop Models ◽  
General Response

The United States is one of the top rice exporters in the world, but warming temperatures and other climate trends may affect grain yield and quality. The use of crop models as decision support tools for a climate impact assessment would be beneficial, but suitability of models for representative growing conditions need to be verified. Therefore, the ability of CERES-Rice and ORYZA crop models to predict rice yield and growing season duration in the Mississippi Delta region was assessed for two widely-grown varieties using a 34-year database. CERES-Rice simulated growth duration more accurately than ORYZA as a result of the latter model’s use of lower cardinal temperatures. An increase in base and optimal temperatures improved ORYZA accuracy and reduced systematic error (e.g., correlation coefficient increased by 0.03–0.27 and root mean square error decreased by 0.3–1.9 days). Both models subsequently showed acceptable skill in reproducing the growing season duration and had similar performance for predicting rice yield for most locations and years. CERES-Rice predictions were more sensitive to years with lower solar radiation, but neither model accurately mimicked negative impacts of very warm or cold temperatures. Both models were shown to reproduce 50% percentile yield trends of more than 100 varieties in the region for the 34-year period when calibrated with two representative cultivars. These results suggest that both models are suitable for exploring the general response of multiple rice cultivars in the Mississippi Delta region for decision support studies involving the current climate. The response of rice growth and development to cold injury and high temperature stress, and variation in cultivar sensitivity, should be further developed and tested for improved decision making tools.

Disparities in breast cancer subtypes among women in the lower Mississippi Delta Region states

2019 ◽  
Vol 30 (6) ◽  
pp. 591-601 ◽  
Author(s):  
Whitney E. Zahnd ◽  
Recinda L. Sherman ◽  
Hillary Klonoff-Cohen ◽  
Sara L. McLafferty ◽  
Susan Farner ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Mississippi Delta ◽  
Breast Cancer Subtypes ◽  
Delta Region ◽  
Cancer Subtypes

Erosional furrows on continental shelf edge, Mississippi delta region

1981 ◽  
Vol 1 (1) ◽  
pp. 11-15 ◽  
Author(s):  
James M. Coleman ◽  
David B. Prior ◽  
Charles E. Adams
Keyword(s):  
Continental Shelf ◽  
Mississippi Delta ◽  
Shelf Edge ◽  
Delta Region

Bottom Furrows and Estimated Currents in the Mississippi Delta Region

1983 ◽  
Vol 23 (01) ◽  
pp. 177-183 ◽  
Author(s):  
Charles E. Adams ◽  
David B. Prior ◽  
James M. Coleman
Keyword(s):  
Boundary Layer ◽  
Free Stream ◽  
Mississippi Delta ◽  
Quantitative Information ◽  
Benthic Boundary Layer ◽  
Layer Model ◽  
Delta Region ◽  
Delta Area ◽  
Bottom Currents ◽  
Roll Vortices

Summary A simple model of a neutrally buoyant, steady-state benthic boundary layer is used to examine the relationships between the dimensions of secondary roll vortices in the boundary layer and the spacing of a system of bottom furrows located offshore of the Mississippi Delta. The mean free-stream flow velocity predicted by the model, which creates the desired ratio between those two parameters, is an estimate of the free-stream current speed necessary for furrow erosion. In the absence of direct current measurements, such estimates are of value not only for offshore design but also for planning subsequent current measurement programs. Introduction In a recent paper, a system of bottom furrows located in a reentrant at the continental shelf edge in the Mississippi Delta region was described. These furrows and other recognized sedimentary bedforms indicate that bottom processes associated with near-bottom currents are active in the area. Direct observations of bottom currents, however, are scarce. Intensive petroleum exploration activities are being conducted in the potentially productive offshore Mississippi Delta area. Bottom activity and sediment movement are critical factors in the design and placement of oil and gas production and transportation facilities. The bottom furrows provide evidence of the general nature of the operative bottom processes. Using an existing boundary layer model and furrow geometry, it is possible to extract some quantitative information about the currents believed to be responsible for the furrows. These estimates can provide an important parametric input to design studies. In this paper, bottom furrows in the Mississippi Delta region are summarized briefly and their presence is attributed to a secondary circulation consisting of a system of longitudinal roll vortices. A benthic boundary layer model that accounts for the effects of stable stratification on boundary layer structure is used to extract quantitative information on near-bottom currents. Background The Mississippi Delta furrows became known initially as a result of a systematic mapping survey of the offshore Mississippi River delta area by high-frequency echo sounder, subbottom profiler, and side-scan sonar from 1977 through 1979. Closely spaced survey lines [900 ft (275 m)] allowed the furrow distribution to be mapped by sonographic mosaicking techniques. Subsequent work has documented the presence of similar highly localized features 50 miles (80 km) to the west in the Mississippi Canyon, A bathymetric influence on furrow location is suggested by the absence of these features in the intervening topographically uniform bottom area. Erosional furrows have been observed in a number of different marine environments. SPEJ P. 177^

scholarly journals Estimating a Potential Cropland Supply Function for the Mississippi Delta Region

1980 ◽  
Vol 56 (4) ◽  
pp. 457 ◽  
Author(s):  
Robert N. Shulstad ◽  
Billy E. Herrington ◽  
Ralph D. May ◽  
E. Moye Rutledge
Keyword(s):  
Mississippi Delta ◽  
Supply Function ◽  
Delta Region

Stroke Prevention: Awareness of Risk Factors for Stroke Among African American Residents in the Mississippi Delta Region

2010 ◽  
Vol 102 (2) ◽  
pp. 84-94 ◽  
Author(s):  
Anthony M. Sallar ◽  
P. Bassey Williams ◽  
Ademola M. Omishakin ◽  
Debra Patton Lloyd
Keyword(s):  
Risk Factors ◽  
African American ◽  
Stroke Prevention ◽  
Mississippi Delta ◽  
Delta Region
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