Describes the lessons learned of the six-year California drought (1987-1992). This report will improve the mgmt. of water resources during future droughts in California & other states. These lessons capture the views of some 100 interviewed participants representing 57 organizations in California that manage or influence the mgmt. of water. The participating organizations represented Fed., state, regional, & local water supply agencies as well as environmental, private & governmental entities that influence water management in the state.

Describes methods for improving water mgmt. during drought developed during a 4-year study. The methods were tested & refined in 4 filed studies in different parts of the country, in which teams of water managers & users worked together to reduce drought impacts. This report explains the procedure for coop. Fed.-state Drought Preparedness Studies, to indicate how these studies relate to the longstanding principles & guidance for Fed. water resources investigations, & to indicate the means of implementing conclusions arrived at in any given region. Tables.

This report is designed to help water managers & planners who are not expert in modeling, & modeling experts in one area who are interested in surveying available models in another area. Covers: model development & distribution org's.; general-purpose software; demand forecasting & balancing supply with demand; water distribution system models; ground water models; watershed runoff models; stream, hydraulics models; river & reservoir water quality models; & reservoir/river system operation models. Inventory of selected models appendix. Tables.

Most of the world's freshwater resources in the liquid state (i.e. not in glaciers and polar caps) are underground. As the population grows and demand for water rises, reliance on groundwater increases. In many cases the groundwater underlies boundaries, or is part of a hydraulic system that crosses boundaries. In such cases there is always the danger that the 'prisoner's dilemma' will run its course and all parties will compete over who will pump the most water, ultimately destroying the storage potential to the detriment of future generations of all parties reliant on the groundwater. This book explores the options and means for averting this all too realistic scenario by managing these shared groundwater resources. Nowhere is the likelihood of excessive use of groundwater greater than in the water-scarce Middle East, and especially in the Israeli-Palestinian case. Here both sides are heavily reliant on a shared aquifer, the Mountain aquifer. This book is the outcome of a seven-year effort to find ways to manage the Mountain aquifer, perhaps the most important resource shared by Israelis and Palestinians. As part of this cooperative study, four workshops were held in which a selected number of Palestinian, Israeli, and foreign experts were invited. The chapters in this book were originally presented in one of these workshops. To these papers introductory and concluding chapters were added.