Water Table Dynamics and Biogeochemical Cycling in a Shallow, Variably-Saturated Floodplain

comparison of soil saturated hydraulic conductivity under shallow well and guelph permeameter method above the water table

to design subsurface drainage systems, it is necessary to determine the saturated hydraulic conductivity of the soil. one of the most common methods for field measurement of this parameter is the shallow well pump-in test method. another method which has recently been introduced for the above measurement is the guelph permeameter method. both methods are used to measure the soil saturated hydra...

Modeling Variably Saturated Water Flow and Multicomponent Reactive Transport in Constructed Wetlands

important factors in controlling subsurface flow and/or contaminant transport, and/or evaluating regional and Constructed wetlands (CWs) are becoming increasingly popular global water cycles (Scanlon et al., 2002). worldwide for removing organic matter (OM), nutrients, trace elements, pathogens, or other pollutants from wastewater and/or runoff Many or most vadose zone models consider the trans...

Implementation of variably saturated flow into PHREEQC for the simulation of biogeochemical reactions in the vadose zone

Sensitivity and moment analyses of head in variably saturated regimes

A numerical approach for approximating statistical moments of hydraulic heads of variably saturated flows in multi-dimensional porous media is developed. The approximation relies on a first-order Taylor series expansion of a finite element flow model and an adjoint state numerical method for variably saturated flows to evaluate sensitivities. This approach can be employed to analyze uncertainti...

Marine biogeochemical cycling of mercury.