Arising from the Department of Defense's mandate to incorporate biodiversity in lands under its control, the study presented in this volume assesses the natural areas of the Upper San Pedro River Basin in the US and Mexico, its current and historic uses, and the needs of wildlife associated with the area. The assessment is presented along with a series of possible models for the area, based on development, water, vegetation, and other factors. The possible models and their various permutations are presented graphically using GIS-based simulation modeling. The study was carried out by researchers at several major institutions including the Harvard U. Graduate School of Design, the Desert Research Institute, the U. of Arizona, the Instituto del Medio Ambiente y el Desarrollo Sustentable del Estado de Sonora, and branches of the US Army. Annotation (c) Book News, Inc., Portland, OR (booknews.com)