Eos,Vol. 81, No. 28, July 11,2000

SECTION NEWS G E O M A G N E T I S M & P A L E O M A G N E T I S M

P L A N E T A R Y S C I E N C E S

Editor: Lisa R. Gaddis, Astrogeology Program, USGS, Flagstaff, AZ 86001 USA; Tel: +1-520-556-7053; Fax: +1-520-556-7014; Section President James W.Head III; Section Secretary, John F Mustard

Outstanding Student Paper Awards PAGE 312

The Planetary Sciences Section presented two outstanding student paper awards at the 2000 Spring Meeting in Washington, D.C., last June.

Devon M. Burr presented a poster titled "Improved Discharge Calculations for the Cer­

berus Region, Mars." Devon received her B.S. from the United States Naval Acade­my in 1989, a M A . from St. John's College in 1996, and a M.S. from the Uni­versity of Iowa in 1998. She is working

toward a Ph.D. at the University of Arizona in Tucson under the supervision of Professors Victor Baker and Alfred McEwen on flood geomorphology of Iceland and Mars.

Kathryn E. Fishbaugh presented a paper titled "Comparison of the North and South

Polar Caps of Mars: New Insights from Mars Orbiter Laser Altimeter (MOLA) Data." Kathryn received her B A . in astronomy and physics from Boston University in 1998, and recently

received her Sc.M. in geology from Brown University. She is presently working toward a Ph.D. in geology under the supervision of Professor James W Head, III at Brown Univer­sity in Providence, Rhode Island. Kathryn's research interests include the geologic histo­ry of the northern and southern polar caps of Mars and their relationship to the geolog­ic history of the planet as a whole.

Outstanding Student Paper Award

The Geomagnetism & Paleomagnetism Sec­tion presented an outstanding student paper award to Arlo B. Weil at the 2000 Spring Meet­ing in Washington, D.C., last June.

Editor: John A. Stamatakos, CNWRA, Southwest Research Institute, San Antonio, TX 78238 USA; Tel: +1-210-522-5247; Fax: +1-210-522-5155; Section President, William Lowrie; Section Secretary, Catherine G. Constable

Arlo B. Weil presented a paper titled "A SEM and Rock Magnetic Perspective of

Orogen-Related Remagnetizations: Characterization of Magnetic Mineralogy and Granulometry of Devonian Lime­stones from North­ern Spain." Arlo received his under­graduate degree in 1993 from the

University of Oregon, and his M.S. degree from the University of Michigan in 1997. He is currently completing his Ph.D. at the University of Michigan under the guidance of Professors Rob Van derVoo and Ben van der Pluijm. Arlo's interests range from fold-and-thrust belt kinematics and remagnetization of carbonates to Proterozoic paleogeography and the Rodinia supercontinent.

BOOK REVIEWS Optimal Management of Flow in Groundwater Systems PAGE 315

r j p r j n DAVID P. AHLFELD mj AND ANN E. MULLIGAN Academic Press, San Diego, California, 185 pp., ISBN 0-12-044830-0, 0-12-044831-9 (CD-ROM), 1999, $59.95.

Groundwater simulation models are physi­cally based mathematical models derived from Darcys law and the law of conservation of mass.Various established solution techniques utilizing either the finite difference or the finite element method, or a combination of both, are available for solving the governing equation of the model, provided that model parameters and initial and boundary condi­tions are properly specified.With the advance-

HBi;

ment of numerical computing and various user-friendly interface software, groundwater simulation models are now commonly used by groundwater planners to assist in the deci­sion making in a variety of water resources management problems.

In simulation,groundwater models are used to predict (1) the hydraulic or water quality response of the aquifer system to a set of pumping and recharge schedules and (2) the probable hydrologic and environmental impacts associated with groundwater develop­ment. Because it can only consider a limited number of management alternatives, the simu­lation approach generally does not identify the optimal pumping/recharge schedules in the context of all the objectives and constraints. A recent advancement in groundwater modeling has been the development of management models that combine optimization and simula­tion. In contrast to simulation, optimization models identify optimal planning, design,and operational policies for the groundwater

system. And because the simulation model is incorporated in a constraint set of the management model, the optimal decisions not only define the optimal pumping/recharge schedules, but also predict the time and spatial variation in the hydraulic head.

Now we have the publication of Optimal Management of Flow in Groundwater Systems. The major contribution of this book is that it combines optimization methods with numeri­cal models for the management of groundwa­ter flow.The resulting management model provides a quantitative tool for optimizing the groundwater system within the context of the specified objective function and constraints. The book presumes that the reader is generally familiar with groundwater simulation models and the fundamental principles of ground­water flow and contaminant transport.

The book, as the title implies, considers only groundwater flow. Most of the examples are predicated on the concept of hydraulic gradient control. However, post-optimization analysis can be carried out to verify the transport of contaminants. If necessary, the constraints specified in the hydraulic gradient control formulation can be modified and the management model solved again.The con­cept and methodology are clearly presented.