Procedure for quantifying a solute flux to a shallow perched water table

Geoderma ◽  
2007 ◽  
Vol 138 (1-2) ◽  
pp. 57-64 ◽  
Author(s):  
T.J. Gish ◽  
K.-J.S. Kung
Keyword(s):  
Water Table ◽  
Solute Flux ◽  
Perched Water ◽  
Perched Water Table

Numerical analysis of one-dimensional decay of a perched water table

1978 ◽  
Vol 36 (1-2) ◽  
pp. 109-119 ◽  
Author(s):  
K.K. Watson ◽  
F.D. Whisler ◽  
A.A. Curtis
Keyword(s):  
Numerical Analysis ◽  
Water Table ◽  
One Dimensional ◽  
Perched Water ◽  
Perched Water Table

Perched Water Table Responses to Forest Clearing in Northern Idaho

2004 ◽  
Vol 68 (1) ◽  
pp. 168-174 ◽  
Author(s):  
S. L. Rockefeller ◽  
P. A. McDaniel ◽  
A. L. Falen
Keyword(s):  
Water Table ◽  
Perched Water ◽  
Forest Clearing ◽  
Perched Water Table ◽  
Northern Idaho

Estimating the Contribution of a Perched Water Table to the Seasonal Evapotranspiration of Cotton 1

1979 ◽  
Vol 71 (6) ◽  
pp. 1056-1060 ◽  
Author(s):  
W. W. Wallender ◽  
D. W. Grimes ◽  
D. W. Henderson ◽  
L. K. Stromberg
Keyword(s):  
Water Table ◽  
Perched Water ◽  
Perched Water Table

Soil Moisture Analyses to Locate Shallow Ground Water: A Solution to a Vexing Problem

2001 ◽  
Author(s):  
Lloyd E. Deuel ◽  
George H. Holliday
Keyword(s):  
Soil Moisture ◽  
Water Table ◽  
Unsaturated Flow ◽  
Particle Density ◽  
Field Capacity ◽  
Degree Of Saturation ◽  
Monitoring Wells ◽  
Perched Water ◽  
Perched Water Table ◽  
Potential Contaminant

Abstract EPA and most States require a hydrogeologic assessment of contaminated sites to identify and characterize the upper most aquifer and potential pathways for contamination. The advancement of soil borings, followed by the completion of monitoring wells in boreholes is often the first step in direct site characterization. These monitoring wells have the potential to contaminate deeper ground waters; if the site has a contaminated seasonal perched water table from which water is allowed to enter the borehole before the well is cased. This condition is particularly troublesome when a temporary monitoring well is used for assessment purposes and contaminate concentrations are compared to maximum concentration limits (MCLs) for drinking water. A seasonal or permanent perched water table may be contaminated, but separated and protected from deeper useable groundwater by the unsaturated ‘vadose’ zone. The lack of saturation in the vadose naturally restricts the movement of water due to unsaturated flow dynamics and the corresponding flux of soluble constituents irrespective of attenuating reactions with soil. This paper presents a method of distinguishing saturated zones from unsaturated zones by comparative analysis of existing soil moisture and the field capacity or 33.3 kPa (1/3 bar) moisture equivalent. Moisture measurements are made for core samples collected in continuous fashion to a selected depth and sample interval determined by the use and sensitivity required in the interpretation of the data. Soil moisture profiles in conjunction with geophysical measurements of bulk density and particle density allow determination of volume wetness and degree of saturation. Additionally, these data are used to assess the movement of water in the soil profile and potential contaminant migration to useable groundwater. The authors have used this technique to differentiate vadose zones sandwiched between seasonal perched water and even thin continuous saturated zones from useable groundwater. Actual field data are presented to demonstrate the ease with which false positive results are generated that portends an adverse impact to groundwater and the need for costly risk reduction analysis or remediation.

Perched Water Table Fluctuation Compared to Streamflow

1975 ◽  
Vol 39 (2) ◽  
pp. 343-348 ◽  
Author(s):  
W. E. Palkovics ◽  
G. W. Petersen ◽  
R. P. Matelski
Keyword(s):  
Water Table ◽  
Water Table Fluctuation ◽  
Perched Water ◽  
Perched Water Table

scholarly journals Impact of compaction on two sensitive forest soils in Lorraine (France) assessed by the changes occurring in the perched water table

2019 ◽  
Vol 437 ◽  
pp. 380-395
Author(s):  
P. Bonnaud ◽  
Ph. Santenoise ◽  
D. Tisserand ◽  
G. Nourrisson ◽  
J. Ranger
Keyword(s):  
Water Table ◽  
Forest Soils ◽  
Perched Water ◽  
Perched Water Table

Regenerating Wet Sites with Bare-Root and Containerized Loblolly Pine Seedlings¹

1987 ◽  
Vol 11 (1) ◽  
pp. 52-56 ◽  
Author(s):  
J. L. Yeiser ◽  
J. L. Paschke
Keyword(s):  
Water Table ◽  
Loblolly Pine ◽  
Seedling Survival ◽  
Test Site ◽  
First Year ◽  
Perched Water ◽  
Perched Water Table ◽  
Containerized Seedlings ◽  
Pine Seedlings ◽  
Bare Root

Abstract Seedling survival on a 1983 planted test site with a perched water table was 99% for both containerized and bare-root seedlings planted in May after the perched water table receded and 15% for seedlings planted in February while soils were saturated. Also, differences in survival forMay 1984 plantings on an upland flatwoods site, a terrace along an ephemeral stream, and a river floodplain site, indicate that each site possesses inherent properties uniquely influencing seedling survival. After the perched water table had receded, first-year mean survival of containerized seedlings was 19% higher than for bare-root seedlings. Some families showed tolerance to excessive soil moisture and are probably well suited for general planting on wet sites. The higher cost of containerized seedlings can be justified if a replant or marginal survival can be avoided. SouthJ. Appl. For. 11(1): 52-56.

Non Monotonic Imbibition Profiles and Transition to a Perched Water Table in a Gradually Layered Soil

2012 ◽  
pp. 167-174 ◽  
Author(s):  
Marco Peli ◽  
Stefano Barontini ◽  
Thom Bogaarda ◽  
Baldassare Bacchi ◽  
Roberto Ranzi
Keyword(s):  
Water Table ◽  
Layered Soil ◽  
Perched Water ◽  
Perched Water Table
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