Showing papers on "Water scarcity published in 1969"

Water Supply Economics, Technology and Policy

Abstract: An attempt is made in this book to effect a major change, rather than merely a marginal modification in the trend of current practice and thought on water-supply problems. Since publication of the first edition of this book in 1960, the authors have reexamined water developments in their two major case-study areas: New York City and southern California. The evaluations and recommendations of the authors from the original book are further discussed here in twelve chapters: The Water Problem; Our Water Resources; The Present Picture; The Economics of Utilization of Existing Water Supplies; Criticisms of Market Allocations; The Political Allocation Process; Municipal Water Rates; Investment in Additional Water Supplies; The Practical Logic of Investment Efficiency Calculations;Technological Features and Costs of Alternative Supplies of Water; Water Law: Government Discretion or Property Rights; New York's ''Water Crisis'': Case Study of a Crucial Decision; Water for Southern California: Case Study of an Arid Region; and Some Controversial Conclusions and Their Implications. (MCW)

Predicting Effects of Water Shortage on Crop Yield

Abstract: This paper discusses the relationships existing between water use (expressed as evapotranspiration) and yields of alfalfa, wheat and grain sorghum. Data, assembled from a number of sources, is used to tentatively formulate water production functions in both absolute and relative forms. A detailed hypothetical example of use of such a function for water allocation and management planning for maximization of wheat production during a water shortage is given. The example serves to put into perspective the disproportionate importance which can attach to stored soil moisture and in-season precipitation when maximization of total production is the goal. Conclusions are basically that definition of water use-yield relationships can be done for certain crops from experimental data extant, and that the functions thus produced would greatly assist planners at all levels in making water allocation and management decisions, particularly in situations of water shortage.

Combined use of surface and ground water for the water supply to barcelona (spain)

Abstract: Summary The geological and hydrological caracteristics of the ground-water reservoirs used for the Barcelona water suply are described. The conection between surface and ground water is emphasized. Ground water meets about 50% of the courrent water demands for water suply to Barcelona Metropolitan area (500 hm3 for year or 360 MGD). Present and future problems such as water pollution and water shortage, legal cuestions and education are briefty touched upon. Finally the operational plan to solve or to avoid these problems is described This plan includes combined use of surface and sub-surface reservoirs for water concervation.