Characterization of preferential solute transport in soil
نویسنده
چکیده
CHAPTER L GENERAL INTRODUCTION 1 [ntroduction I Dissertation Organization 4 References 5 CHAPTER 2. EVALUATION OF A SIMPLE METHOD FOR ESTIMATING SOLUTE TRANSPORT PAR.\>4ETERS: LABORATORY STUDIES 9 Abstract 9 [ntroduction 10 Materials and Methods 13 Results and Discussion 16 Conclusions 22 References 23 CHAPTER 3. A TIME DOMAIN REFLECTOMETRY METHOD TO MEASURE IMMOBILE WATER CONTENT AND MASS EXCHANGE COEFFICIENT 35 Abstract 35 Introduction 36 Materials and Methods 41 Results and Discussion 47 Conclusions 49 References 50
منابع مشابه
Estimation of zeolite application effect on solute transport parameters at different soils using HYDRUS-1D model
ABSTRACT-Application of models for simulation of solute and pollutants transport in soil can reduce time and costs for remediation process. HYDRUS-1D model was developed to simulate the one–dimensional flow of soil water, heat, solute and viruses in variably saturated–unsaturated porous media. The objective of this investigation is to determine the solute transport parameters in disturbed soil ...
متن کاملCharacterization of preferential flow in undisturbed, structured soil columns using a vertical TDR probe.
Rapid movement of agricultural chemicals through soil to groundwater via preferential flow pathways is one cause of water contamination. Previous studies have shown that time domain reflectometry (TDR) could be used to characterize solute transport in soil. However, previous studies have only scarcely addressed preferential flow. This study presents an extended application of TDR for determinin...
متن کاملبررسی اثر ساختمان خاک بر منحنی رخنه بروماید در شرایط رطوبتی اشباع و غیراشباع
In this study, the effect of soil structure under saturated and unsaturated flow conditions on nonreactive bromide (BR) transport was investigated. The soil structure treatments consisted of undisturbed columns (prismatic and granular structures), and disturbed columns (single- grain structure). A constant concentration (C0= 0.005 M) of bromide was supplied on the surface of the columns in a st...
متن کاملDye staining and excavation of a lateral preferential flow network
Papers published in Hydrology and Earth System Sciences Discussions are under open-access review for the journal Hydrology and Earth System Sciences Abstract Preferential flow features have been found to be important for runoff generation, solute transport, and slope stability in many areas around the world. Although many studies have identified the particular characteristics of individual feat...
متن کاملA preferential flow leaching index
[1] The experimental evidence suggests that for many chemicals surface runoff and rapid preferential flow through the shallow unsaturated zone are significant pathways for transport to streams and groundwater. The signature of this is the episodic and pulsed leaching of these chemicals. The driver for this transport is the timing and magnitude of rainfall events which trigger rapid flow and the...
متن کامل