Identification of recharge zones in the Lower Mississippi River alluvial aquifer using high-resolution precipitation estimates

Dyer, Jamie; Mercer, Andrew E.; Rigby, James R.; Grimes, Alexandria

doi:10.1016/j.jhydrol.2015.07.016

Cited by 17 publications

(8 citation statements)

References 21 publications

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“…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%

“…Although the MRVA is geologically a confined aquifer, it behaves as an unconfined aquifer regarding replenishing its water supply where surface water may or may not be hydrologically connected to the aquifer. This means that it is replenished directly from surface water (rivers and precipitation infiltration) with different recharge rate which depends on the precipitation characteristics, topography, vegetation coverage, depth to groundwater, and soil conditions [ 22 ]. In some areas of the aquifer, it exhibits confined or semiconfined conditions at least during part of the year.…”

Section: Methodsmentioning

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%

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 aquifer thickness can range from 25 feet to 150 feet [ 51 ]. The Lower Mississippi River Valley Alluvial aquifer is the one of the heavily used aquifer in the United States [ 53 ].…”

Section: Methodsmentioning

confidence: 99%

A Bayesian framework to unravel food, groundwater, and climate linkages: A case study from Louisiana

2020

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Advancing our understanding of the connections among groundwater, food, and climate is critical to meet global food demands while optimizing water resources usage. However, our understanding of the linkages among groundwater, food, and climate is still limited. Here, we offer a Bayesian framework to simulate crop yield at a regional scale and quantify its relationships and associated uncertainty with climate, groundwater, agricultural, and energyrelated variables. We implemented the framework in the rice-producing regions of Louisiana from 1960-2015. To build a parsimonious model, we used a probability-based variable selection approach to detect the key drivers of rice yield. Rice yield increased, groundwater declined, and area planted declined or did not change over 56yrs. The number of irrigation wells, groundwater level, air temperature, and area planted were found to be the key drivers of rice yield. The regression coefficients showed that rice yield was positively related to groundwater level, and negatively related to area planted and the number of irrigation wells. The limited influence of N fertilizer was noted on rice yield for the period when fertilizer data were available. The inverse relationship between rice yield and area planted pointed to the adaption of efficient crop management practices that maintained or increased yield, despite the decline in area planted. The farmers' ability to install irrigation wells during droughts sustained the yields over long-term but not short-term. This decline in rice yield in response to drought over the short-term might explain the negative relation between yield and irrigation wells. Overall, this work highlighted the uncertainty in relationships between rice yield and key drivers and quantified the intimate connection between food and groundwater. This work may have implications for managing two highly competing commodities (i.e., groundwater and food) in agricultural regions.

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“…Consequently, an all-encompassing approach to water management is required to slow and reverse aquifer depletion. On the water supply side, artificial aquifer recharge projects [9,10] and the use of alternative surface and recycled water sources [11,12] are considered key components to the solution. On the water demand side, agricultural practices that increase water-use efficiency and reduce overall water use without significant reductions in yields or farmer profits have been proposed to slow the rates of depletion [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Irrigation Water Management Tools and Alternative Irrigation Sources Trends and Perceptions by Farmers from the Delta Regions of the Lower Mississippi River Basin in South Central USA

et al. 2022

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This article describes the opinions and perceptions of farmers on water management tools that conserve groundwater and on alternative sources of water for irrigation. The analysis is based on a survey of producers (N=466) across the Lower Mississippi River Basin (LMRB) areas of Arkansas, Louisiana, Mississippi, and Missouri. Summary statistics of practice usage across the region and for each state are presented. A Poisson count model is applied to the data to identify factors that influence the number of groundwater-conserving practices employed. The number of irrigated acres, years of farming, annual income level, perception of groundwater problems, and participation in conservation programs have statistically significant association with the number of practices employed. Years of farming experience is the only factor negatively associated with the number of practices employed, while participation in conservation programs has the largest magnitude effect on that number. These results provide evidence that sponsored conservation programs increase the number of conservation practices adopted by farmers. This insight is useful for producer collectives, policy makers, and program managers to design and target of conservation programs across the LMRB.

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Identification of recharge zones in the Lower Mississippi River alluvial aquifer using high-resolution precipitation estimates

Cited by 17 publications

References 21 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

A Bayesian framework to unravel food, groundwater, and climate linkages: A case study from Louisiana

Irrigation Water Management Tools and Alternative Irrigation Sources Trends and Perceptions by Farmers from the Delta Regions of the Lower Mississippi River Basin in South Central USA

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