Three dimensional zone of capture analysis for the A/M-area

Jackson, D. R.; Aleman, S.E.

doi:10.2172/572430

Cited by 8 publications

(16 citation statements)

References 2 publications

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“…(Looney and Phifer, 1994) The influence of RWM-16 in providing plume containment and control within the Southern Sector has been examined in the latest zone of capture analysis. (Jackson and Aleman, 1995) This analysis indicated that RWM-16 provides capture of only a portion of the groundwater plume that is currently located within the Southern Sector. The analysis revealed that in order to accomplish complete plume control and capture within the Southern Sector additional wells and extraction volume are required.…”

Section: Southern Sectormentioning

confidence: 96%

“…The system provides groundwater remediation via pump and treat technology for the Central A/M Area. (Jackson and Aleman, 1995) In addition to the dissolved plume present in the Central A/M Area, NAPL is present in both the unsaturated and saturated zones. (Looney et al, 1992) To address and remediate the NAPL in the unsaturated zone a series of soil vapor extraction units have been installed in the source zone regions along the process sewer line and beneath the M-Area Basin.…”

Section: Central Aim Areamentioning

confidence: 99%

“…As with the M 1 System, the performance and effectiveness of the A1 and A2 Systems has been evaluated through extensive groundwater modeling activities. (Jackson and Aleman, 1995) The approach SRS is taking in regards to Northern Sector remediation is to maximize mass removal in the Tertiary sediments using conventional pump and treat technologies. The goal of this program is to prevent the further downward migration of contaminants from the shallow Tertiary sediments to the deeper Cretaceous sediments.…”

Section: Northern Sectormentioning

confidence: 99%

“…The thickness was determined using the difference between Model Layer #2 and Model Layer #4 of the previously developed fully three-dimensional model. (Jackson and Aleman, 1995) The distribution of applied vertical thickness is presented in Figure 36, again referenced to the applied model domain. As shbwn in Table 6 the vertical thickness ranged from 29.2 to 93.4'with an average value of 57.7 feet.…”

Section: Boundary Conditionsmentioning

confidence: 99%

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Development of a Vertical Recirculation Well System for the A/M Area of the Savannah River Site

Jackson¹,

Looney²

1996

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Section: Southern Sectormentioning

confidence: 96%

Section: Central Aim Areamentioning

confidence: 99%

Section: Northern Sectormentioning

confidence: 99%

Section: Boundary Conditionsmentioning

confidence: 99%

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Development of a Vertical Recirculation Well System for the A/M Area of the Savannah River Site

Jackson¹,

Looney²

1996

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“…The central A/M Area is defined based upon zone of capture mcxleling for this system and its effectiveness has been evaluated through extensive groundwater modeling activities. (Papadopulos & Associates 1987, Haselow et.al 1991 Previous modeling activities evaluated the effectiveness of the pump& treat system (Jackson and Aleman, 1995) with regards to remediation goals in the Tertiary sediments. The previous investigation identified the 5, 15, and 30 year zone of capture in the "Middle Sand" aquifer zone, the Lost Lake aquifer zone, and in the M-Area aquifer zone.…”

Section: Pump and Treat Systemmentioning

confidence: 99%

Characterization Activities to Determine the Extent of DNAPL in the Vadose Zone at the A-014 Outfall of A/M Area

Jackson¹

2000

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Root systems of peanut cultivars respond differently to soil P availability to improve P uptake

Cordeiro,

Echer,

Rosolem

2024

J. Plant Nutr. Soil Sci.

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BackgroundPeanut (Arachis hypogaea L.) is regarded as a crop with high nutrient use efficiency, but there may be differences between cultivars. Furthermore, there is little information on the strategy of peanut cultivars to adapt to soil P availability and to what extent they explore non‐labile P pools.AimsOur objective was to evaluate growth, root morphology, enzymatic activity in the rhizosphere, and P uptake of peanut cultivars grown under different soil P status.MethodsThe study was conducted in a greenhouse in 6‐L pots. Soils with low P (without fertilization) and high P content (with fertilization) and seven peanut cultivars of different origins, different maturation groups, and release years were investigated. Peanut shoot yield, phosphorus uptake, root growth, soil P fractions as well as phosphatase activity in the rhizosphere soil were determined.ResultsIn P‐deficient soil, a higher dry matter yield was associated with longer root hairs and root length, which resulted in decreased soil non‐labile P was observed mainly with cultivars developed in Argentina (ARG‐medium‐old and ARG‐medium‐new) and the late maturity Brazilian cultivar (BR I‐late new). These cultivars adapted well to P deficiency and were less dependent on labile P. New Brazilian early and medium maturity cultivars developed less, shorter root hairs, and showed low acid phosphatase activity in the rhizosphere under P deficiency, resulting in lower P uptake and dry matter yield. Under high P availability, new Brazilian cultivars of medium and late maturity showed the highest dry matter yield (9.0 and 9.8 g plant−1, respectively) and longest roots, around 120 m plant−1. High P availability decreased root hairs in all cultivars.ConclusionOverall, the adaptation of peanut cultivars to P‐deficient soils was lower for the new mid‐ and early‐maturing Brazilian cultivars compared with the Argentinian and old or late‐maturing Brazilian cultivars. The main strategies of P‐efficient cultivars under low P availability are to increase root length, root hair length, and root hair density.

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Three dimensional zone of capture analysis for the A/M-area

Cited by 8 publications

References 2 publications

Development of a Vertical Recirculation Well System for the A/M Area of the Savannah River Site

Development of a Vertical Recirculation Well System for the A/M Area of the Savannah River Site

Characterization Activities to Determine the Extent of DNAPL in the Vadose Zone at the A-014 Outfall of A/M Area

Root systems of peanut cultivars respond differently to soil P availability to improve P uptake

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