Local-scale Solute Transport In
Variously Structured Soils Under
Continuous Flood Irrigation
Author(s)
A. Comegna, A. Coppola, A. Sommella & G. Severino
Abstract
This paper reports the results of research carried out to establish the possibility of
using Time Domain Reflectometry (TDR) technology in measuring
breakthrough curves of anion tracers such as chloride and bromide. The test
conditions adopted refer to the case of undisturbed porous media with bimodal
porosity under saturated-unsaturated conditions and to a liquid phase of assigned
chemical characteristics. The BTCs were measured with vertically installed TDR
probes. Interpretation of signal impedance was carried out in a similar fashion to
Kachanosky et al. so as to obtain estimates of the minimum impedance load Z0.
The measured BTCs were interpreted to estimate transport parameters by using a
two-parameter convective-dispersive model. Finally, a sensitivity analysis of the
hydrodynamic dispersion parameter as related both to the average pore water
velocity v, and TDR measurement errors were performed.
Keywords: solute transport models, chloride breakthrough curve, TDR
calibration.
1 Introduction
Contamination of groundwater has received considerable attention in recent
years because of concerns about degradation of this important source of fresh
water, with possible toxicological consequences. Contamination has often been
associated with point sources such as disposal sites or illegal dumping of
chemical and industrial wastes. More recently, non-point pollution has become
the center of increased attention by the research community, both in urban and
Keywords
solute transport models, chloride breakthrough curve, TDR
calibration.
Related Book
Other papers in this volume
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