Altitude of the potentiometric surface in the Mississippi River Valley alluvial aquifer, spring 2020

McGuire, Virginia L.; Seanor, Ronald C.; Asquith, William H.; Strauch, Kellan R.; Nottmeier, Anna M.; Thomas, Judith C.; Tollett, Roland W.; Kress, Wade H.

doi:10.3133/sim3478

Cited by 3 publications

(9 citation statements)

References 23 publications

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“…This area is covered with dense agricultural activities and the irrigation water is mostly (98%) supplied from groundwater withdrawn from the alluvial aquifer [ 8 , 18 , 19 , 20 ]. MAP is a humid region but because it receives most of its rainfall outside of the growing season, groundwater and surface water are the main sources of water for irrigation purposes.…”

Section: Methodsmentioning

confidence: 99%

“…Situated in the northern portion of the MAP from approximately Vicksburg, Mississippi then north through the valley is underlain by the Mississippi River Valley Aquifer (MRVA). This aquifer is one of the heaviest pumped groundwater systems in the United States [ 21 ] and is connected to surface-water features in some regions and unconnected in others at least during part of the year, given spring 2020 groundwater and surface water measurements [ 8 , 22 , 23 ]. The alluvial aquifer is composed of Quaternary-age sands and gravel deposited after Wisconsin glaciation, making it an ideal surficial aquifer with many high-yield wells [ 18 , 20 ].…”

Section: Methodsmentioning

confidence: 99%

“…Despite this amount of rainfall each year in the Mississippi Delta, and the existence of the Mississippi River in the area, the groundwater resources are under stress since more than 90% of its supply is being used for irrigation purposes which have resulted in significant areas of water level decline in parts of the aquifer. In terms of the volume of pumped water for irrigation purposes, the Ogallala aquifer of the High Plains region is the most productive agricultural aquifer in the U.S. followed by LMRAA and California’s Central Valley aquifers as the second productive agricultural aquifers [ 8 , 22 , 23 ]. According to [ 23 ] in 2005, 11 billion gallons of groundwater was pumped from the aquifers in the Mississippi embayment.…”

Section: Methodsmentioning

confidence: 99%

“…There are large depressions in the potentiometric-surface map in the Delta region in the Mississippi Alluvial Plain (MAP) [ 8 ]. The largest depression in the potentiometric surface is in the central part of the Delta region (west of Leflore County and east of Sunflower County), and the flow of water in the Delta region is toward this large depression.…”

Section: Introductionmentioning

confidence: 99%

“…Unlike other research that has used a time series of GRACE images and used different models for downscaling the images, we focus on one image from April 2020 and use specifically RFM to downscale the GRACE mascon image. According to [ 8 ], there is a large depression in Sunflower and Leflore counties in the Mississippi Delta region in 2020 as shown in Figure 1 . We aim to find out if we can see this depression in the GRACE mascon downscaled image for 2020 or not.…”

Section: Introductionmentioning

confidence: 99%

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Using Downscaled GRACE Mascon Data to Assess Total Water Storage in Mississippi Alluvial Plain Aquifer

Ghaffari,

Easson,

Yarbrough

et al. 2023

Sensors

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The importance of high-resolution and continuous hydrologic data for monitoring and predicting water levels is crucial for sustainable water management. Monitoring Total Water Storage (TWS) over large areas by using satellite images such as Gravity Recovery and Climate Experiment (GRACE) data with coarse resolution (1°) is acceptable. However, using coarse satellite images for monitoring TWS and changes over a small area is challenging. In this study, we used the Random Forest model (RFM) to spatially downscale the GRACE mascon image of April 2020 from 0.5° to ~5 km. We initially used eight different physical and hydrological parameters in the model and finally used the four most significant of them for the final output. We executed the RFM for Mississippi Alluvial Plain. The validating data R2 for each model was 0.88. Large R2 and small RMSE and MAE are indicative of a good fit and accurate predictions by RFM. The result of this research aligns with the reported water depletion in the central Mississippi Delta area. Therefore, by using the Random Forest model and appropriate parameters as input of the model, we can downscale the GRACE mascon image to provide a more beneficial result that can be used for activities such as groundwater management at a sub-county-level scale in the Mississippi Delta.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Using Downscaled GRACE Mascon Data to Assess Total Water Storage in Mississippi Alluvial Plain Aquifer

Ghaffari,

Easson,

Yarbrough

et al. 2023

Sensors

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The LTAR Cropland Common Experiment in the Lower Mississippi River Basin

Locke,

Witthaus,

Lizotte

et al. 2024

J of Env Quality

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The Lower Mississippi River Basin‐Long‐Term Agroecosystem Research Site (LMRB‐LTAR) encompasses six states from Missouri to the Gulf of Mexico and is coordinated by the USDA‐ARS National Sedimentation Laboratory, Oxford, MS. The overarching goal of LTAR is to assess regionally diverse and geographically scalable farming practices for enhanced sustainability of agroecosystem goods and services under changing environment and resource‐use conditions. The LMRB‐LTAR overall goal is to assess sustainable row crop agricultural production systems that integrate regional environmental and socioeconomic needs. Primary row crops in the region include soybeans, corn, cotton, rice, and sugarcane with crop rotations influenced by commodity crop price and other factors. The field‐scale common experiment (CE) includes four row crop farms (26–101 ha) established in 2021 and 2023. Three fields are managed with alternative practices, including reduced tillage, cover crops, and automated prescription irrigation, and three fields are managed with prevailing farming practices, consisting of conventional tillage, no cover crop, and nonprescription irrigation. Treatment effects on crop productivity, soil quality, water use efficiency, water quality, and carbon storage are assessed. Research from the LMRB CE will deliver outcomes linked to overarching LTAR network goals, including innovative agricultural systems, strengthened partnerships, data management technologies, and precision environmental tools.

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Simulating groundwater flow in the Mississippi Alluvial Plain with a focus on the Mississippi Delta

Leaf,

Duncan,

Haugh

et al. 2023

Scientific Investigations Report

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The authors would also like to acknowledge Jonathan (JP) Traylor, Moussa Guira and Wade Kress (of the U.S. Geological Survey [USGS]) for technical discussions that shaped the model development. Martha Nielsen (USGS) and Daniel Abrams (Illinois State Water Survey) provided thoughtful review comments that greatly improved the quality of the report. Sam Rendon (USGS) worked on a Hydrologic Engineering Center River Analysis System (HEC-RAS) simulation of interior streams in the Mississippi Delta as a potential alternative method for simulating stream stage. Aaron Heldmyer (USGS) selected and compiled the downscaled General Circulation Model outputs for the future climate scenarios. Steve Westenbroek (USGS) ran a version of the Soil-Water-Balance code model with each set of downscaled climate output and provided us with the results.

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Altitude of the potentiometric surface in the Mississippi River Valley alluvial aquifer, spring 2020

Cited by 3 publications

References 23 publications

Using Downscaled GRACE Mascon Data to Assess Total Water Storage in Mississippi Alluvial Plain Aquifer

Using Downscaled GRACE Mascon Data to Assess Total Water Storage in Mississippi Alluvial Plain Aquifer

The LTAR Cropland Common Experiment in the Lower Mississippi River Basin

Simulating groundwater flow in the Mississippi Alluvial Plain with a focus on the Mississippi Delta

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