Ground water. Volume 31. N 3 / Грунтовые воды. Том 31. Номер 3

Guest Editorial — God Didn’t Make Those Little DNAPLS Andrew W. Stone
Risk-Based Evaluation of Ground-Water Contamination by Agricultural Pesticides    P. Varshney, U. S. Tim & С. E. Anderson
Agrotechnically Induced Salinization in the Unsaturated Zone of Loessial Soils, N.W. Negev, Israel    M. Magaritz & A. Nadler
A Simple Analytical Approach for Predicting Nitrate Concentrations in Pumped Ground Water    D. N. Lerner & К. T Papatolios
Vadose Zone Fertilizer-Derived Nitrate and <5 l5N Extracts    M. J. Herbel & R. J. Spalding
The Annual Regime of Shallow Ground-Water Levels in Poland    Wojciech Chelmicki
Estimation of Dispersion Parameters for Two-Dimensional Plumes    S. Zou & A. Parr
Estimating Movement of Ground Water from a Pond or Large-Radius Conduit    T. Brikowski
Coupled Simulation-Optimization Modeling for
Municipal Ground-Water Supply Protection    M.D. Varljen & J. M. Shafer
Fate of Organochlorine Compounds During Aquifer
Storage and Recovery: The Las Vegas Experience    C.J. Miller, L. G. Wilson, G. L. Amy & K. Brothers
Urban Ground-Water Pollution: A Case Study
from Coventry, United Kingdom     M. M. Nazari, M. W. Burston, P. K. Bishop & D. N. Lerner
In Situ Soil Remediation Using Vapor Extraction Wells, Development and Testing of a
Three-Dimensional Finite-Difference Model     M. Sepehr& Z. A. Samani
Modeling Vapor Extraction and General Transport in the
Presence of NAPL Mixtures and Nonideal Conditions    D. A. Benson, D. Huntley & P. C. Johnson
Design and Evaluation of a Mesoscale Model
Vadose Zone and Ground-Water System    J.R. Lawrence, B. N. Zanyk, M. J. Hendry, G. M. Wolfaardt, R. D. Robarts & D. E. Caldwell
Extension of the Method of Characteristics for
Simulation of Solute Transport in Three Dimensions    C. Zheng
Sampling Colloids and Colloid-Associated
Contaminants in Ground Water    D. A. Backhus, J. N. Ryan, D. M. Groher, J. K. MacFarlane & P. M. Gschwend
A Geographic Information System (GIS) User Interface for Delineating Wellhead Protection Areas    H. S. Rifai, L. A. Hendricks, K. Kilborn & P. B. Bedient
Computer Notes — Simulation of Cylindrical Flow to a Well Using the U.S. Geological Survey Modular
Finite-Difference Ground-Water Flow Model     Т.Е. Reilly & A. W. Harbaugh
Discussion of Papers
Historical Perspectives    John H. Tellam
New Books
Selected New Publications    Adrian P. Visocky
Ground-Water Employment Opportunities Student Section Professional Services