ASSESSMENT OF WASTEWATER CONTAMINANT CONCENTRATION THROUGH THE VADOSE ZONE IN A SOIL AQUIFER TREATMENT SYSTEM

Simulation of Water and Contaminant Transport Through Vadose Zone - Redistribution System

Root Zone Soil Moisture Assessment Using Remote Sensing and Vadose Zone Modeling

Soil moisture is an important hydrologic state variable critical to successful hydroclimatic and environmental predictions. Soil moisture varies both in space and time because of spatio-temporal variations in precipitation, soil properties, topographic features, and vegetation characteristics. In recent years, airand space-borne remote sensing campaigns have successfully demonstrated the use of...

Vadose zone influences on aquifer parameter estimates of saturated-zone hydraulic theory

Aquifer drainage was numerically simulated by a coupled, unsaturated-saturated flow equation. The effect of the vadose zone on aquifer parameter predictions of classical hydraulic theory was investigated. Saturated-zone hydraulic theory was shown to be fairly robust in estimating the saturated hydraulic conductivity but less so in estimating drainable porosity, mainly because of the much tighte...

Biodegradation in the Vadose Zone

Colloid-facilitated Transport of Radionuclides through the Vadose Zone

Research Objectives: This project seeks to improve the basic understanding of colloid and colloid-facilitated transport of Cs in the vadose zone. The specific objectives are: • Determine the structure, composition, and surface charge characteristics of colloidal particles formed under conditions similar to those occurring during leakage of waste typical of Hanford tank supernatants into soils a...