Estimation of ratio of interception by shelterbelts from the saturated zone to evaporative loss

2012 ◽  
pp. 267-284 ◽  
Keyword(s):  
Saturated Zone ◽  
Evaporative Loss

Characteristics of Inverted Saturated Zone under Unclogged Streams

2021 ◽  
pp. 126288
Author(s):  
Dawei Cheng ◽  
Hongbin Zhan ◽  
Jie Li ◽  
Donghui Cheng
Keyword(s):  
Saturated Zone

scholarly journals Silicified serpentinite – a residuum of a Tertiary palaeo-weathering surface in the United Arab Emirates

2012 ◽  
Vol 150 (3) ◽  
pp. 385-395 ◽  
Author(s):  
ALICJA M. LACINSKA ◽  
MICHAEL T. STYLES
Keyword(s):  
United Arab Emirates ◽  
Middle Eocene ◽  
Temperate Climate ◽  
Mixing Zone ◽  
Saturated Zone ◽  
Near Surface ◽  
Silica Precipitation ◽  
Surface Mixing ◽  
Ph Conditions ◽  
Mineralizing Fluids

AbstractMineralogical studies of a silicified serpentinite from the United Arab Emirates throw light on the formative processes. The silicified serpentinite is a residuum of a palaeo-weathering surface that probably developed in a temperate climate with alternating wet and dry periods during middle Eocene to late Miocene times. The rock textures indicate that silicification occurred in a fluid-saturated zone. Silica precipitation is favoured at near-neutral pH. In this study we infer that these pH conditions of the mineralizing fluids could arise in a near-surface mixing zone where acidic meteoric and hyperalkaline groundwater fluids are mingled. This mingling is believed to have resulted from alternating processes of evaporation and precipitation that prevailed during dry and wet seasons, respectively. The silicified serpentinite is composed of > 95% quartz and exhibits a ghost texture of the protolith serpentinite. Preservation of the textures indicates an iso-volumetric grain-by-grain replacement by dissolution of Mg-silicate and simultaneous precipitation of either opal or microquartz as siliceous seeds. These were subsequently overgrown by silica that was probably remobilized from deeply weathered regolith elsewhere.

Chemical fate and transport in a domestic septic system: Unsaturated and saturated zone geochemistry

1994 ◽  
Vol 13 (2) ◽  
pp. 193-203 ◽  
Author(s):  
Sheryl R. Wilhelm ◽  
Sherry L. Schiff ◽  
William D Robertson
Keyword(s):  
Fate And Transport ◽  
Saturated Zone ◽  
Septic System ◽  
Chemical Fate

scholarly journals Estimation of evaporative loss based on the stable isotope composition of water using Hydrocalculator

2015 ◽  
Vol 523 ◽  
pp. 781-789 ◽  
Author(s):  
Grzegorz Skrzypek ◽  
Adam Mydłowski ◽  
Shawan Dogramaci ◽  
Paul Hedley ◽  
John J. Gibson ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Isotope Composition ◽  
Stable Isotope Composition ◽  
Evaporative Loss ◽  
Isotope Composition Of Water

Steady State Analysis of Heated Soil Vapor Extraction Process With Air Sparging

2005 ◽  
Author(s):  
P. M. Mohan Das ◽  
R. S. Amano ◽  
T. Roy ◽  
J. Jatkar
Keyword(s):  
Extraction Process ◽  
Soil Vapor Extraction ◽  
Air Sparging ◽  
Saturated Zone ◽  
Vapor Extraction ◽  
Combined System ◽  
Discrete Phase Modeling ◽  
Discrete Phase ◽  
Time Required ◽  
Heated Soil

Heated Soil Vapor Extraction (HSVE), developed by Advanced Remedial Technology is a Soil remediation process that has gained significant attention during the past few years. HSVE along with Air sparging has been found to be an effective way of remediating soil of various pollutants including solvents, fuels and Para-nuclear aromatics. The combined system consists of a heater/boiler that pumps and circulates hot oil through heating wells, a blower that helps to suck the contaminants out through the extraction well, and air sparging wells that extend down to the saturated region in the soil. Both the heating wells and extraction wells are installed vertically in the saturated region in contaminated soil and is welded at the bottom and capped at the top. The heat source heats the soil and the heat is transported inside the soil by means of conduction and convection. This heating of soil results in vaporization of the gases, which are then absorbed by the extraction well. Soil vapor extraction cannot remove contaminants in the saturated zone of the soil that lies below the water table. In that case air sparging may be used. In air sparging system, air is pumped into the saturated zone to help flush the contaminants up into the unsaturated zone where the contaminants are removed by SVE well. In this analysis an attempt has been made to predict the behavior of different chemicals in the unsaturated and saturated regions of the soil. This analysis uses the species transport and discrete phase modeling to predict the behavior of different chemicals when it is heated and absorbed by the extraction well. Such an analysis will be helpful in predicting the parameters like the distance between the heating and extraction wells, the temperature to be maintained at the heating well and the time required for removing the contaminants from the soil.

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